WO1996027223A2 - Polarized fiber laser source - Google Patents
Polarized fiber laser source Download PDFInfo
- Publication number
- WO1996027223A2 WO1996027223A2 PCT/US1996/002626 US9602626W WO9627223A2 WO 1996027223 A2 WO1996027223 A2 WO 1996027223A2 US 9602626 W US9602626 W US 9602626W WO 9627223 A2 WO9627223 A2 WO 9627223A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laser
- polarization
- light
- fiber
- along
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06712—Polarising fibre; Polariser
Definitions
- Such prior art laser sources do not provide a simple inexpensive means for controlling the polarization state of the output light from the laser.
- Such polarization control of the output light from the fiber laser is desirable if the fiber laser is used as a source to provide light to polarization sensitive fiber components such as fiber couplers, waveguide devices, or polarization sensitive optical modulators. Also, having polarization control is useful if a plurality of fiber lasers output lights are to be combined.
- Fig. 2 is a schematic block diagram of a polarization controlled master oscillator power amplifier (MOPA) arrangement, in accordance with the present invention.
- MOPA master oscillator power amplifier
- Fig. 3 is a schematic block diagram of a polarization controlled external cavity semi- conductor laser, in accordance with the present invention.
- Fig. 4 is a schematic block diagram of a polarization controlled distributed feedback fiber laser, in accordance with the present invention.
- a polarization controlled fiber laser 10 includes a predetermined length of optical fiber 12 having Bragg gratings 14,16 embedded in the core of the fiber a predetermined distance apart along the fiber 12. Between the gratings 14,16 is a region of fiber 18 of which all or a portion thereof is doped with a predetermined rare-earth dopant (or gain or active medium), e.g., Erbium, Neodymium, etc., which acts as a laser cavity. Also, the section of fiber where the gratings are located may also be doped if desired.
- a predetermined rare-earth dopant or gain or active medium
- a Bragg grating is a periodic variation in refractive index of the fiber core which has a reflectivity profile which reflects a predetermined narrow wavelength band of light and passes all other wavelengths.
- the gratings 14,16 have a grating spacing so as to provide a peak reflectivity at a lasing wavelength ⁇ L (e.g., 1550 nanometers, for an erbium-doped cavity) of the fiber laser.
- the gratings 14,16 and the doped fiber cavity 18 make up the three fundamental elements of a typical fiber laser, such as is described in U.S. Patent No. 5,305,335, entitled “Single Longitudinal Mode Pumped Optical Waveguide Laser Arrangement", to Ball et al, and U.S. Patent No. 5,317,576, entitled “Continuously Tunable Single-Mode Rare-Earth Doped Pumped Laser Arrangement", to Ball et al., as well as U.S. Patent No. 5,237,576 entitled “Article Comprising an Optical Fiber Laser” to DiGiovanni, all of which are incorporated herein by reference.
- the gain medium then emits photons at the lasing wavelength ⁇ , as indicated by a line 24.
- the light 24 is incident on an embedded angled (or slanted) fiber Bragg grating tap 26 having an angle ⁇ (relative to the longitudinal axis of the fiber) and a spacing D between peaks in the refractive index perturbation, so as to efficiently couple light at the lasing wavelength(s) ⁇ L and at one polarization out of the fiber core, as indicated by a line 28 (discussed more hereinafter) .
- the grating tap 26 is written into the fiber core in a manner similar to that discussed in U.S. Patent No.
- the light 24 within the laser cavity is composed of light which has polarization components along two optical orthogonal polarization states (or axes or modes) , i.e., the "s" polarization state as indicated by a dot 30 and/or the orthogonal "p" polarization state as indicated by a line 32.
- the grating tap 26 acts as a polarizing element by reflecting a predetermined amount, e.g., 2%, of the incident radiation in the "s" polarization while reflecting a minimal amount, ' e.g., less than 0.1%, of incident radiation in the "p” polarization.
- the light 28, which is tapped-out of the laser cavity consists primarily of light polarized along the "s" polarization state, as indicated by a dot 34. Accordingly, light which passes through the slanted grating tap 26, as indicated by a line 36, has a preferential polarization along the "p" polarization state, as indicated by a line 38. Therefore, the light 36 that passes through the grating tap 26 will be 98% of the "s" polarized light that was incident on the grating tap 26 and 99.9% of the "p" polarized incident light on the grating tap 26. Other grating tap percentages may be used if desired, as discussed hereinafter.
- the gratings 14,16 for a fiber laser are designed to have a narrow reflection wavelength at the lasing wavelength ⁇ L .
- the front grating 14 reflects 98% of light at the lasing wavelength ⁇ and the back grating 16, from which the output laser light exits, typically reflects 98% of the cavity light 36 at the lasing wavelength ⁇ L .
- Other percent reflectivities may be used if desired.
- the light 36 at the lasing wavelength ⁇ L that passes through the back grating 16 exits the laser as output laser light, as indicated by a line 40.
- a predetermined amount of the cavity light 36 reflects off the back grating 16, as indicated by a line 44.
- the light 44 is incident on the grating tap 26 which reflects the aforementioned predetermined amount of light at the lasing wavelength out of the cavity, as indicated by a line 46 having a polarization along the "s" polarization state, as indicated by a dot 48.
- the portion of the light 44 which passes through the grating tap 26, as indicated by a line 50 is primarily polarized along the "p" polarization state, as indicated by the line 32.
- the loss of light oscillating in the laser cavity is lower for the "p" polarized light than the "s" polarized light.
- the "s" polarized light is essentially suppressed from lasing because the fiber laser will lase on the most efficient optical longitudinal mode.
- the loss in the "s" polarization is increased such that the lasing threshold is not achieved, whereas the "p" polarization mode is above the lasing threshold. Consequently, the output laser light 40 exiting the cavity is "p" polarized, as indicated by a line 52.
- the grating tap 26 introduces more than 1% single pass loss into the cavity.
- Other grating lengths and/or ⁇ n/n may be used if desired. It is known in the art how to fabricate grating taps to couple-out a predetermined amount of incident light. In general, the longer the grating tap, the more light that is coupled-out of the cavity.
- the "stronger" the grating tap i.e., the larger the change in refractive index of the grating
- the more light that is coupled-out of the cavity is provided in Copending US Patent Application, Serial No. (UTC Docket No. R-3912), entitled, “Single Polarization Fiber and Amplifier", filed contemporaneously herewith.
- intracavity loss that must be introduced to suppress the unwanted polarization state from lasing is determined by the particular laser design; however, a 1% single pass loss should be sufficient to ensure single polarization output for a short fiber laser, e.g., less than 10 cm. More specifically, as is known, suppression of adjacent longitudinal modes is achieved by use of Bragg grating reflectors having narrow bandwidth, typically 0.1 to 0.2 nanometer (nm) full-width-half-max, thereby providing substantially single mode fiber laser operation. Because the degree of differential loss that is required to suppress one polarization state from lasing should be substantially less than that required to suppress adjacent longitudinal lasing modes of the fiber laser.
- 1% single-pass loss for the grating tap 26 should be sufficient to ensure single polarization of the output laser light 40 and less than 1% loss may likely be sufficient in many instances.
- a short slanted grating tap exhibits polarization sensitive reflection as is discussed in the article: G. Meltz et al, "In-fiber Bragg Grating Tap", Optical Fiber Communication Conference, 1990 Technical Digest Series, Vol. 1 (Jan. 1990) .
- a short (5 mm) grating tap was formed in a polarization maintaining fiber to illustrate this principle.
- the sensitivity of the slanted grating tap 26 to the polarization of incident light is related to the optical theory on Brewster' s angle.
- the grating 26 reflects light polarized normal to the plane of incidence (or parallel to the reflecting surface of the tap, or "s" polarized in Fig. 1), independent of the angle of incidence.
- light polarized parallel to the plane of incidence (or normal to the reflecting surface, or "p” polarized in Fig. 1) and incident on the grating at the Brewster' s angle is transmitted with minimal reflection.
- the angle of the grating tap 26 should be set such that the cavity light incident on the grating tap is incident on the tap at the Brewster' s angle.
- the Brewster' s angle for a small fractional refractive index change ( ⁇ n/n) at the reflection interface e.g., 0.05-0.1% (which is typical for a Bragg grating)
- ⁇ n/n fractional refractive index change
- 0.05-0.1% which is typical for a Bragg grating
- the angle is close to 45 degrees.
- the grating tap 26 will typically be set at about 45 degrees from the longitudinal axis of the fiber so as to allow the tap to reflect only light polarized parallel to the reflecting surface of the grating tap.
- Other values for the angle ⁇ of the tap 12 may be used if desired based on the ⁇ n for the grating tap used in a given case.
- the polarization controlling concept of the present invention applies equally well to fiber laser cavities which use more conventional mirrors, such as dielectrics or other reflecting surfaces, for optical cavity feedback.
- the fiber grating tap of the present invention could also be used to control the polarization of a fiber ring resonator in the same way as it is used to control the polarization of a standing wave laser cavity of Fig. 1.
- the grating tap 26 is shown to be in the center of the laser cavity 18, it may be placed anywhere along the laser cavity between the two reflectors 14,16.
- the invention can be used to control the polarization for a multiple longitudinal lasing mode fiber laser, provided that sufficient loss is introduced in one polarization mode for selected longitudinal modes so that such longitudinal modes are below the lasing threshold such and do not lase.
- the invention will work equally well with single or multiple longitudinal mode fiber lasers.
- the fiber laser may be made of polarization preserving (or maintaining) fiber. In that case, the lasing polarization can be easily identified at the end of the fiber for connection to down-steam optical components.
- the fiber laser may be made of a fiber having more than one spatial mode (i.e., multi-spatial mode fiber) . In that case, the polarization of light propagating along each mode may be coupled out of the laser by one or more slanted grating taps (depending on the magnitude of the difference between the optical frequency associated with each spatial mode and the bandwidth of the grating tap) in a manner similar to that described in US Patent No. 5,048,913, entitled "Optical Waveguide Embedded Transverse Spatial Mode Discrimination Filter", to Meltz et al.
- the invention will work equally well in a Master Oscillator Power Amplifier (MOPA) arrangement, similar to that described in copending US Patent Application, Serial No. 08/013,490, "Embedded Bragg Gating Pumped Optical Waveguide Laser Source/Power Amplifier Arrangement", to Ball et al.
- MOPA Master Oscillator Power Amplifier
- the polarization controlled fiber laser 10 is connected to an optical isolator 100.
- the output of the isolator 100 is connected to a optical fiber amplifier 102, which comprises an optical fiber doped with a rare-earth dopant (or gain medium) , e.g., erbium.
- a rare-earth dopant or gain medium
- the isolator 100 prevents light emitted from the amplifier 102 from entering and disrupting the operation of the fiber laser 10.
- the light 40 comprises light at the pump wavelength ⁇ P that was not absorbed by the gain medium in the fiber laser 10 as well as light at the lasing wavelength ⁇ L .
- the light 40 exits the fiber laser 10, passes through the isolator 100 and enters the amplifier
- the fiber amplifier 102 has a grating tap 108, similar to the tap 26 within the fiber laser 10, which extends along the entire length or a substantial portion of the length of the fiber amplifier 102.
- the tap 108 similar to the tap 26, is oriented at an angle and has a grating spacing so as to couple light 110 out of the fiber 102 having one polarization (e.g., dot 111) and pass the light 104 having the orthogonal polarization (e.g., line 112).
- the polarization of the light 40 exiting the fiber laser 10 is aligned with the polarization axis which is passed by the amplifier 102.
- the opposite polarizations may be used, if desired.
- Use of the grating tap 108 allows only the polarization of the output light 40 from the laser 10 to be passed by the amplifier 102, thereby ensuring that the output light 104 will be polarized along the same polarization mode as the output of the laser 10 (i.e., along line 112). Also, if the light 40 from the laser 10 had some component in the undesired polarization, the tap 108 will further attenuate that component at the output.
- the fiber 102 may be polarization preserving (or maintaining) fiber.
- tap need not extend over the entire length of the fiber amplifier.
- the continuous grating tap 108 in the MOPA amplifier 102 is also discussed in copending US Patent Application, Serial No. (UTC Docket No. R-3912), entitled, "Single Polarization Fiber and Amplifier", filed contemporaneously herewith.
- a conventional fiber laser without polarization control may be used instead of using the polarization controlled fiber laser 10 as the fiber laser in Fig. 2, a conventional fiber laser without polarization control may be used.
- the light 40 would be elliptically polarized and the grating tap 108 would couple at a predetermined portion of laser light along one polarization (e.g., dot 111) and pass the other polarization mode (e.g., line 112) .
- the output light 104 would have a preferential polarization along the line 112.
- a semiconductor laser 190 e.g., a laser diode
- the laser diode 190 has a front facet 202 and a rear facet 204.
- the front facet 202 is coated with an anti-reflection (AR) coating which allows laser light within the semiconductor laser 190 to not be reflected by the front facet 202.
- An optical fiber 206 is connected to the laser diode front facet 202 at one end and has a straight grating 210 embedded at the opposite end.
- the grating 210 acts as one laser cavity reflector, and the facet 204 is the other reflector.
- An angled grating tap 212 is embedded in the fiber 208 and reflects one polarization (e.g., a dot 213) out of the fiber 208 as indicated by lines 214, 216. Consequently, the external cavity semiconductor laser will have more loss along one polarization than the other and lase on the less lossy polarization mode.
- the output light 218 will be polarized along one polarization (e.g., the line 280) .
- the fiber 208 is typically not a gain medium.
- the invention will also work equally well with a distributed feedback laser.
- the pump light 20 from the pump source 22 is provided to a fiber 250 having 2 gratings 252,254 which extend from opposite ends of the fiber 250 toward the middle thereof, but end a predetermined distance 11 from each other, e.g., one quarter of a lasing wavelength, so as to support single longitudinal mode lasing, similar to that discussed in the articles: J. Kringlebotn et al, "Er+3:Yb+3 -Codoped Fiber Distributed-Feedback Laser", Optics Letters, Vol. 19, No. 24, pp 2101- 2103 (Dec. 1994); and H.
- An angled grating tap 256 similar to the tap 26, extends over the entire length of the fiber 250 and is oriented at an angle and has a grating spacing so as to a couple-out light 258 of one polarization (e.g., a dot 260) and pass light of the other polarization (a line 262) at the lasing wavelength.
- a couple-out light 258 of one polarization e.g., a dot 260
- a line 262 pass light of the other polarization
- the gratings 252,254 may be replaced with one continuous grating without the quarter wavelength gap. This typically results in multiple longitudinal mode lasing.
- the lasing frequency (or wavelength) for each polarization mode will be different due to cavity birefringence, the difference between the lasing frequencies for the two polarization modes depends on the amount of fiber birefringence and is typically small.
- the slanted grating may be designed for maximum reflectivity at the lasing frequency associated with the polarization mode being coupled-out of the cavity (and that will not lase) .
- any solid optical waveguide e.g., a planar, rib, or channel waveguide, instead of an optical fiber.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69604569T DE69604569T2 (en) | 1995-03-02 | 1996-02-27 | POLARIZED FIBER LASER SOURCE |
CA002212444A CA2212444C (en) | 1995-03-02 | 1996-02-27 | Polarized fiber laser source |
JP52638296A JP3833708B2 (en) | 1995-03-02 | 1996-02-27 | Polarized fiber laser source |
EP96907896A EP0812484B1 (en) | 1995-03-02 | 1996-02-27 | Polarized fiber laser source |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/398,206 US5511083A (en) | 1995-03-02 | 1995-03-02 | Polarized fiber laser source |
US08/398,206 | 1995-03-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1996027223A2 true WO1996027223A2 (en) | 1996-09-06 |
WO1996027223A3 WO1996027223A3 (en) | 1996-10-10 |
Family
ID=23574431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/002626 WO1996027223A2 (en) | 1995-03-02 | 1996-02-27 | Polarized fiber laser source |
Country Status (7)
Country | Link |
---|---|
US (1) | US5511083A (en) |
EP (1) | EP0812484B1 (en) |
JP (1) | JP3833708B2 (en) |
CA (1) | CA2212444C (en) |
DE (1) | DE69604569T2 (en) |
ES (1) | ES2140070T3 (en) |
WO (1) | WO1996027223A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19925686A1 (en) * | 1999-06-04 | 2000-12-14 | Zeiss Carl Jena Gmbh | Fibre laser for video projector etc, has polarizing fibre e.g. spliced onto end of lasing optical fibre |
US7120340B2 (en) | 2003-06-19 | 2006-10-10 | Corning Incorporated | Single polarization optical fiber laser and amplifier |
Families Citing this family (83)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9409033D0 (en) * | 1994-05-06 | 1994-06-29 | Univ Southampton | Optical fibre laser |
NO302441B1 (en) * | 1995-03-20 | 1998-03-02 | Optoplan As | Fiber optic end-pumped fiber laser |
US5757832A (en) * | 1995-04-27 | 1998-05-26 | Canon Kabushiki Kaisha | Optical semiconductor device, driving method therefor and light source and opitcal communication system using the same |
US5600665A (en) * | 1995-07-28 | 1997-02-04 | Hughes Aircraft Company | Multiple output fiber laser with passive frequency control and method |
US5647038A (en) * | 1995-08-30 | 1997-07-08 | Hughes Aircraft Company | Narrow bandwidth Bragg grating reflector for use in an optical waveguide |
US6111681A (en) | 1996-02-23 | 2000-08-29 | Ciena Corporation | WDM optical communication systems with wavelength-stabilized optical selectors |
US5699377A (en) * | 1996-04-30 | 1997-12-16 | E-Tek Dynamics, Inc. | Narrow linewidth, stabilized semiconductor laser source |
US5754718A (en) * | 1996-08-26 | 1998-05-19 | Jds Fitel Inc. | Hybrid optical filtering circuit |
US6016375A (en) * | 1997-01-08 | 2000-01-18 | Hill; Kenneth O. | Wavelength selective fiber to fiber optical tap |
US7576909B2 (en) * | 1998-07-16 | 2009-08-18 | Imra America, Inc. | Multimode amplifier for amplifying single mode light |
US7656578B2 (en) * | 1997-03-21 | 2010-02-02 | Imra America, Inc. | Microchip-Yb fiber hybrid optical amplifier for micro-machining and marking |
WO1999027619A2 (en) * | 1997-10-01 | 1999-06-03 | Scientific-Atlanta, Inc. | Multi-mode fiber lasers |
US6041070A (en) | 1997-11-14 | 2000-03-21 | Sdl, Inc. | Resonant pumped short cavity fiber laser |
US5982963A (en) * | 1997-12-15 | 1999-11-09 | University Of Southern California | Tunable nonlinearly chirped grating |
US6915040B2 (en) | 1997-12-15 | 2005-07-05 | University Of Southern California | Devices and applications based on tunable wave-guiding bragg gratings with nonlinear group delays |
US6453093B2 (en) * | 2000-01-07 | 2002-09-17 | Univerisity Of Southern California | Tunable optical dispersion-slope compensation based on a nonlinearly-chirped bragg grating |
US6330383B1 (en) | 1998-02-20 | 2001-12-11 | University Of Southern California | Disperson compensation by using tunable nonlinearly-chirped gratings |
US6122299A (en) * | 1997-12-31 | 2000-09-19 | Sdl, Inc. | Angled distributed reflector optical device with enhanced light confinement |
US6768825B2 (en) | 1998-05-06 | 2004-07-27 | Weatherford/Lamb, Inc. | Optical sensor device having creep-resistant optical fiber attachments |
US6507693B2 (en) | 1998-05-06 | 2003-01-14 | Cidra Corporation | Optical filter device having creep-resistant optical fiber attachments |
JP3250609B2 (en) * | 1998-07-01 | 2002-01-28 | 日本電気株式会社 | Laser oscillation device, laser knife |
US6330257B1 (en) | 1998-08-06 | 2001-12-11 | Sdl, Inc. | Polarization-insensitive laser stabilization using multiple waveguide gratings |
US6188712B1 (en) | 1998-11-04 | 2001-02-13 | Optigain, Inc. | Asymmetrical distributed feedback fiber laser |
US6275512B1 (en) | 1998-11-25 | 2001-08-14 | Imra America, Inc. | Mode-locked multimode fiber laser pulse source |
US6278811B1 (en) | 1998-12-04 | 2001-08-21 | Arthur D. Hay | Fiber optic bragg grating pressure sensor |
US6982996B1 (en) | 1999-12-06 | 2006-01-03 | Weatherford/Lamb, Inc. | Large diameter optical waveguide, grating, and laser |
US6490931B1 (en) | 1998-12-04 | 2002-12-10 | Weatherford/Lamb, Inc. | Fused tension-based fiber grating pressure sensor |
DE69923783D1 (en) | 1998-12-04 | 2005-03-24 | Weatherford Lamb | PRESSURE SENSOR WITH BRAGG GRILLE |
US6810178B2 (en) * | 1998-12-04 | 2004-10-26 | Cidra Corporation | Large diameter optical waveguide having blazed grating therein |
CN1153054C (en) | 1998-12-04 | 2004-06-09 | 塞德拉公司 | Bragg grating pressure sensor |
JP2002533779A (en) | 1998-12-04 | 2002-10-08 | シドラ コーポレイション | Fiber grating housed in a tube |
DE69942749D1 (en) | 1998-12-04 | 2010-10-21 | Cidra Corp | VOLTAGE INSULATED TEMPERATURE SENSOR WITH BRAGG GRILLE |
WO2000033034A1 (en) | 1998-12-04 | 2000-06-08 | Cidra Corporation | Pressure-isolated bragg grating temperature sensor |
US6229827B1 (en) | 1998-12-04 | 2001-05-08 | Cidra Corporation | Compression-tuned bragg grating and laser |
US6621957B1 (en) | 2000-03-16 | 2003-09-16 | Cidra Corporation | Temperature compensated optical device |
US6243515B1 (en) * | 1999-06-18 | 2001-06-05 | Trw Inc. | Apparatus for optically pumping an optical fiber from the side |
ATE357759T1 (en) * | 1999-08-13 | 2007-04-15 | California Inst Of Techn | FREQUENCY LOCKING DEVICE IN A FIBER. |
US6996316B2 (en) * | 1999-09-20 | 2006-02-07 | Cidra Corporation | Large diameter D-shaped optical waveguide and coupler |
US6439055B1 (en) | 1999-11-15 | 2002-08-27 | Weatherford/Lamb, Inc. | Pressure sensor assembly structure to insulate a pressure sensing device from harsh environments |
US6626043B1 (en) * | 2000-01-31 | 2003-09-30 | Weatherford/Lamb, Inc. | Fluid diffusion resistant glass-encased fiber optic sensor |
EP1287591A1 (en) * | 2000-06-07 | 2003-03-05 | CARL ZEISS JENA GmbH | Laser with a fiber optical waveguide |
EP1293018B1 (en) * | 2000-06-20 | 2004-10-13 | Evotec OAI AG | Fiber laser |
US6815828B1 (en) * | 2000-07-18 | 2004-11-09 | Northrop Grumman Corporation | Large multi-function integrated circuit device |
WO2002063248A2 (en) | 2001-02-06 | 2002-08-15 | Weatherford/Lamb, Inc. | Highly sensitive cross axis accelerometer |
US7088877B2 (en) * | 2001-06-13 | 2006-08-08 | Intel Corporation | Method and apparatus for tuning a bragg grating in a semiconductor substrate |
US7006537B2 (en) * | 2001-08-07 | 2006-02-28 | Hrl Laboratories, Llc | Single polarization fiber laser |
US6816514B2 (en) | 2002-01-24 | 2004-11-09 | Np Photonics, Inc. | Rare-earth doped phosphate-glass single-mode fiber lasers |
US6882664B2 (en) * | 2002-02-28 | 2005-04-19 | Lucent Technologies Inc. | Laser with internally coupled pump source |
EP1343227B1 (en) * | 2002-03-06 | 2006-04-26 | Aston University | Generating electronic carrier signals in the optical domain |
US6788727B2 (en) * | 2002-06-13 | 2004-09-07 | Intel Corporation | Method and apparatus for tunable wavelength conversion using a bragg grating and a laser in a semiconductor substrate |
US6950577B2 (en) * | 2002-07-01 | 2005-09-27 | Intel Corporation | Waveguide-based Bragg gratings with spectral sidelobe suppression and method thereof |
JP4007118B2 (en) * | 2002-08-12 | 2007-11-14 | 住友電気工業株式会社 | Light emitting device, optical module, and grating chip |
US7245792B2 (en) * | 2002-08-16 | 2007-07-17 | Intel Corporation | Silicon-based tunable single passband optical filter |
EP1458067B1 (en) * | 2003-03-03 | 2006-12-13 | Alcatel | Multiple output raman fiber laser with stable and small output power for seed applications |
US7689087B2 (en) * | 2003-03-21 | 2010-03-30 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Industry, Through The Communications Research Centre Canada | Method of changing the birefringence of an optical waveguide by laser modification of the cladding |
DK200301835A (en) * | 2003-12-11 | 2005-06-12 | Koheras As | Single frequency thulium fiber laser |
WO2005074573A2 (en) | 2004-01-30 | 2005-08-18 | Nufern | Method and apparatus for providing light having a selected polarization with an optical fiber |
US7724422B2 (en) * | 2004-01-30 | 2010-05-25 | Nufern | Method and apparatus for providing light having a selected polarization with an optical fiber |
US20050242287A1 (en) * | 2004-04-30 | 2005-11-03 | Hosain Hakimi | Optical terahertz generator / receiver |
US20050280887A1 (en) * | 2004-06-02 | 2005-12-22 | Betin Alexander A | Outcoupler with bragg grating and system and method using same |
US7197209B2 (en) * | 2004-07-15 | 2007-03-27 | Bae Systems Information And Electronic Systems Integration Inc. | Optical distribution system for sensors |
US7590155B2 (en) * | 2004-08-05 | 2009-09-15 | Jian Liu | Hybrid high power laser to achieve high repetition rate and high pulse energy |
GB0500277D0 (en) * | 2005-01-07 | 2005-02-16 | Southampton Photonics Ltd | Apparatus for propagating optical radiation |
CN101253659B (en) * | 2005-08-29 | 2010-12-29 | 松下电器产业株式会社 | Fiber laser and optical device |
WO2007066747A1 (en) * | 2005-12-09 | 2007-06-14 | Matsushita Electric Industrial Co., Ltd. | Fiber laser |
WO2008049187A1 (en) | 2006-10-25 | 2008-05-02 | Lxsix Photonics, Inc. | Tilted grating sensor |
US7949215B2 (en) * | 2008-04-18 | 2011-05-24 | Ofs Fitel, Llc | Apparatus for side fire fiber lasers |
US8272236B2 (en) | 2008-06-18 | 2012-09-25 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Industry, Through The Communications Research Centre Canada | High temperature stable fiber grating sensor and method for producing same |
JP5224213B2 (en) * | 2008-09-19 | 2013-07-03 | 学校法人近畿大学 | Fiber optic gyro |
US20100078412A1 (en) * | 2008-09-30 | 2010-04-01 | Caterpillar Inc. | Hybrid welding method |
JP2011114061A (en) * | 2009-11-25 | 2011-06-09 | Fujikura Ltd | Laser oscillator and mode filter |
KR20140026522A (en) * | 2011-04-25 | 2014-03-05 | 오에프에스 피텔 엘엘씨 | Raman distributed feedback fiber laser and high power laser system using the same |
US9575209B2 (en) | 2012-12-22 | 2017-02-21 | Halliburton Energy Services, Inc. | Remote sensing methods and systems using nonlinear light conversion and sense signal transformation |
US9091785B2 (en) | 2013-01-08 | 2015-07-28 | Halliburton Energy Services, Inc. | Fiberoptic systems and methods for formation monitoring |
US20140198377A1 (en) * | 2013-01-15 | 2014-07-17 | Omron Corporation | Laser oscillator |
US10241229B2 (en) | 2013-02-01 | 2019-03-26 | Halliburton Energy Services, Inc. | Distributed feedback fiber laser strain sensor systems and methods for subsurface EM field monitoring |
US9557439B2 (en) | 2014-02-28 | 2017-01-31 | Halliburton Energy Services, Inc. | Optical electric field sensors having passivated electrodes |
WO2016085511A1 (en) | 2014-11-26 | 2016-06-02 | Halliburton Energy Services, Inc. | Onshore electromagnetic reservoir monitoring |
US9651706B2 (en) | 2015-05-14 | 2017-05-16 | Halliburton Energy Services, Inc. | Fiberoptic tuned-induction sensors for downhole use |
WO2017014773A1 (en) | 2015-07-22 | 2017-01-26 | Halliburton Energy Services, Inc. | Electromagnetic monitoring with formation-matched resonant induction sensors |
CN106001926B (en) * | 2016-06-23 | 2018-02-27 | 长春理工大学 | The laser of view-based access control model sensing-real-time automaton of electric arc combined welding and its welding method |
JP2020134722A (en) * | 2019-02-20 | 2020-08-31 | 株式会社フジクラ | Optical device and laser device |
CN110380326B (en) * | 2019-07-29 | 2020-10-23 | 武汉电信器件有限公司 | Optical signal output device and method, and storage medium |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3543509A1 (en) * | 1985-12-10 | 1987-06-11 | Philips Patentverwaltung | Arrangement for frequency stabilization and bandwidth narrowing of lasers, especially semiconductor lasers |
EP0486930A2 (en) * | 1990-11-20 | 1992-05-27 | General Instrument Corporation Of Delaware | Laser with longitudinal mode selection |
US5166940A (en) * | 1991-06-04 | 1992-11-24 | The Charles Stark Draper Laboratory, Inc. | Fiber laser and method of making same |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0191063B1 (en) * | 1984-08-13 | 1992-05-13 | United Technologies Corporation | Method for impressing grating within fiber optics |
US5048913A (en) * | 1989-12-26 | 1991-09-17 | United Technologies Corporation | Optical waveguide embedded transverse spatial mode discrimination filter |
US5317576A (en) * | 1989-12-26 | 1994-05-31 | United Technologies Corporation | Continously tunable single-mode rare-earth doped pumped laser arrangement |
US5042897A (en) * | 1989-12-26 | 1991-08-27 | United Technologies Corporation | Optical waveguide embedded light redirecting Bragg grating arrangement |
US5305335A (en) * | 1989-12-26 | 1994-04-19 | United Technologies Corporation | Single longitudinal mode pumped optical waveguide laser arrangement |
US5061032A (en) * | 1989-12-26 | 1991-10-29 | United Technologies Corporation | Optical waveguide embedded light redirecting and focusing bragg grating arrangement |
US5103456A (en) * | 1990-07-30 | 1992-04-07 | Spectra Diode Laboratories, Inc. | Broad beam laser diode with integrated amplifier |
GB2254183B (en) * | 1991-03-27 | 1995-01-18 | Marconi Gec Ltd | An amplifier/filter combination |
US5237576A (en) * | 1992-05-05 | 1993-08-17 | At&T Bell Laboratories | Article comprising an optical fiber laser |
US5422897A (en) * | 1994-01-28 | 1995-06-06 | British Telecommunications Public Limited Company | Two-stage mono-mode optical fibre laser |
-
1995
- 1995-03-02 US US08/398,206 patent/US5511083A/en not_active Expired - Lifetime
-
1996
- 1996-02-27 CA CA002212444A patent/CA2212444C/en not_active Expired - Lifetime
- 1996-02-27 EP EP96907896A patent/EP0812484B1/en not_active Expired - Lifetime
- 1996-02-27 ES ES96907896T patent/ES2140070T3/en not_active Expired - Lifetime
- 1996-02-27 DE DE69604569T patent/DE69604569T2/en not_active Expired - Lifetime
- 1996-02-27 JP JP52638296A patent/JP3833708B2/en not_active Expired - Lifetime
- 1996-02-27 WO PCT/US1996/002626 patent/WO1996027223A2/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3543509A1 (en) * | 1985-12-10 | 1987-06-11 | Philips Patentverwaltung | Arrangement for frequency stabilization and bandwidth narrowing of lasers, especially semiconductor lasers |
EP0486930A2 (en) * | 1990-11-20 | 1992-05-27 | General Instrument Corporation Of Delaware | Laser with longitudinal mode selection |
US5166940A (en) * | 1991-06-04 | 1992-11-24 | The Charles Stark Draper Laboratory, Inc. | Fiber laser and method of making same |
Non-Patent Citations (4)
Title |
---|
ELECTRONICS LETTERS, 9 JUNE 1994, UK, vol. 30, no. 12, ISSN 0013-5194, pages 972-973, XP002008679 KRINGLEBOTN J T ET AL: "Highly-efficient, low-noise grating-feedback Er/sup 3+/:Yb/sup 3+/ codoped fibre laser" * |
IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 6, no. 2, 1 February 1994, pages 192-194, XP000439747 BALL G A ET AL: "60 MW 1.5 M SINGLE-FREQUENCY LOW-NOISE FIBER LASER MOPA" * |
OPTICAL FIBER COMMUNICATION CONFERENCE. (OFC), SAN FRANCISCO, JAN. 22 - 26, 1990, vol. 1, 22 January 1990, INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, page 24 XP000146226 MELTZ G ET AL: "IN-FIBER BRAGG GRATING TAP" * |
OPTICS LETTERS, vol. 19, no. 24, 15 December 1994, pages 2101-2103, XP000485804 KRINGLEBOTN J T ET AL: "ER3+:YB3+-CODOPED FIBER DISTRIBUTED-FEEDBACK LASER" * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19925686A1 (en) * | 1999-06-04 | 2000-12-14 | Zeiss Carl Jena Gmbh | Fibre laser for video projector etc, has polarizing fibre e.g. spliced onto end of lasing optical fibre |
US7120340B2 (en) | 2003-06-19 | 2006-10-10 | Corning Incorporated | Single polarization optical fiber laser and amplifier |
US7496244B2 (en) | 2003-10-30 | 2009-02-24 | Corning Incorporated | Method for generating a linear single polarization output beam |
Also Published As
Publication number | Publication date |
---|---|
DE69604569T2 (en) | 2000-01-27 |
JPH11501158A (en) | 1999-01-26 |
CA2212444C (en) | 2005-05-24 |
ES2140070T3 (en) | 2000-02-16 |
US5511083A (en) | 1996-04-23 |
JP3833708B2 (en) | 2006-10-18 |
WO1996027223A3 (en) | 1996-10-10 |
DE69604569D1 (en) | 1999-11-11 |
EP0812484B1 (en) | 1999-10-06 |
CA2212444A1 (en) | 1996-09-06 |
EP0812484A2 (en) | 1997-12-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5511083A (en) | Polarized fiber laser source | |
EP0813759B1 (en) | Dual-wavelength pumped low noise waveguide laser | |
EP0767979B1 (en) | Fibre grating stabilized diode laser | |
CA2309892C (en) | Fibre grating stabilized diode laser | |
US5771251A (en) | Optical fibre distributed feedback laser | |
EP0812039B1 (en) | Fiber light source with multimode fiber coupler | |
US5422897A (en) | Two-stage mono-mode optical fibre laser | |
US5905745A (en) | Noise suppression in cladding pumped fiber lasers | |
US6373867B1 (en) | Generation of a wavelength-tunable laser oscillation in a wave-guiding gain medium based on passive mode lock | |
EP1636883B1 (en) | Multiple emitter side-pumping method and apparatus for fiber lasers | |
US4942582A (en) | Single frequency solid state laser | |
EP0784362B1 (en) | Rare-earth doped lithium niobate DBR laser | |
WO2001086766A1 (en) | Semiconductor or solid-state laser having an external fiber cavity | |
US20030021302A1 (en) | Raman cascade light sources | |
WO2000027001A1 (en) | Asymmetrical distributed feedback fiber laser | |
US5644589A (en) | Solid state laser optimized for multimode operation | |
Lovseth et al. | Analysis of multiple wavelength DFB fiber lasers | |
WO2002093697A2 (en) | Fiber laser having a suppressor | |
JP3380749B2 (en) | Fiber grating stabilized diode laser | |
WO1999027619A2 (en) | Multi-mode fiber lasers | |
GB2239733A (en) | A laser oscillator | |
WO2007100341A2 (en) | Grazing incidence slab semiconductor laser system and method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): CA JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
AK | Designated states |
Kind code of ref document: A3 Designated state(s): CA JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref document number: 2212444 Country of ref document: CA Ref country code: CA Ref document number: 2212444 Kind code of ref document: A Format of ref document f/p: F |
|
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 1996 526382 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1996907896 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1996907896 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996907896 Country of ref document: EP |