CN100442613C - A high power narrow linewidth full solid state pulse 910nm laser system - Google Patents
A high power narrow linewidth full solid state pulse 910nm laser system Download PDFInfo
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- CN100442613C CN100442613C CNB2006101188579A CN200610118857A CN100442613C CN 100442613 C CN100442613 C CN 100442613C CN B2006101188579 A CNB2006101188579 A CN B2006101188579A CN 200610118857 A CN200610118857 A CN 200610118857A CN 100442613 C CN100442613 C CN 100442613C
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Abstract
The related high-power narrow-linewidth full-solid impulse 910nm laser system comprises: a laser pumping system included a tuning-Q Nd:YAG laser and a frequency multiplier and a pumping beam shaping/coupling system to output 532nm pumping light, a Ti laser resonant cavity, and an outside-cavity feed light injection system contained a 910nm laser diode. Wherein, the Ti resonant cavity comprises in turn an I/O plane mirror, a first reflector, a concave reflector with two Ti crystals on light arms, and a second reflector. This invention is compact, reliable, and high efficient.
Description
Technical field
The present invention relates to laser, particularly a kind of high power narrow linewidth complete solid state pulse 910nm laser system.
Background technology
Bluish-green laser is communicated by letter under water, application potential is big in the marine exploration.In order to reduce sunlight background, wish that the wavelength of transmitting illuminant can be corresponding with the wavelength 455nm of caesium (Cs) atom filtering device, and have beam quality and higher laser energy preferably.Laser to submarine target communication and differential absorption lidar in, not only require to have Wavelength stabilized high energy laser, and require laser beam divergent angle less, laser facula should be even as far as possible.
Obtain the reliable 455nm laser output of efficient stable, wherein a kind of approach eaily is to realize that by frequency multiplication this just needs a kind of laser of the 910nm of being output as wavelength.Titanium gem crystal has good physics and optical characteristics and the wideest lasers range, and tunable range is 700nm～1050nm, can obtain best bluish-green laser output after nonlinear optical frequency conversion.
General straight chamber and the annular chamber of adopting of titanium precious stone laser resonant cavity, but in straight chamber owing to exist the space to burn empty phenomenon, had a strong impact on output beam quality.And general used annular chamber owing to can not further improve the absorption efficiency of pump light, causes power output also lower, does not satisfy the demand of some practical application.
Summary of the invention
The objective of the invention is in order to improve bluish-green laser power output and beam quality, a kind of high power narrow linewidth complete solid state pulse 910nm laser system is provided, this laser system should be able to be eliminated the spatial hole burning phenomenon, improve the overall conversion efficiency of laser, improve output power of laser and beam quality, should have compact conformation, volume is little, efficient is high, the life-span is long, characteristics such as working stability.
Technical solution of the present invention is:
A kind of high power narrow linewidth complete solid state pulse 910nm laser system, comprise the laser pumping system, titanium precious stone laser resonant cavity and exocoel seed light injected system, be characterized in that described titanium precious stone laser resonant cavity is successively by an input and output level crossing, first plane mirror, the four mirror ring cavity structures that the concave mirror and second plane mirror are formed, on two smooth arms of described concave mirror, put first titanium gem crystal and second titanium gem crystal respectively, described laser pumping system is by the Nd:YAG laser of transferring Q, frequency multiplier and pump beam shaping and coupled system are formed, and the 532nm pump light of its output divides two bundles to inject from the end face of described first titanium gem crystal and second titanium gem crystal respectively; Described exocoel seed light injected system comprises that wavelength is the laser diode of 910nm, and the 910nm laser that this laser diode sends is injected by described input and output level crossing.
Described titanium gem crystal central axis is perpendicular to crystallographic axis, two logical light end faces cut with Brewster's angle, and the normal and the crystallographic axis of two logical optical surfaces are in the same plane, pump light becomes 61.2 ° of angles with the normal of the logical optical surface of titanium gem crystal, the logical light face normal of oscillation light exit direction and titanium gem crystal becomes 60.4 °, after the shaping of pump light process telescopic system, two titanium gem crystals are carried out both-end pumping, guarantee that pump energy density is lower than the damage threshold of crystal.
Described laser pumping system transfers Nd:YAG laser, frequency multiplier and pump beam shaping and the coupled systems of Q to form by a cover or two covers.
It is long to have chosen certain chamber, under the prerequisite that guarantees enough laser output powers, has guaranteed output laser pulse width 18ns, satisfies instructions for use.
The present invention has the following advantages:
1, utilizes the gain waveguide effect of titanium gem crystal, designed four mirror ring cavity structures, can obtain high efficiency titanium precious stone laser output.If increase the energy of pump light simultaneously, only need to guarantee that facula area is enough big, can not surpass the crystal damage threshold value, just can obtain more high-power laser output.
2, use bicrystal in this annular chamber, pump light divides two bundle end pumping crystal, can effectively improve the power output of laser; The cutting of titanium gem crystal Brewster's angle obtains polarised light output;
3, two titanium gem crystals are positioned over two arms respectively about axial symmetry in the concave mirror.Pump light by first plane mirror, concave mirror and second plane mirror to the crystal end-face pumping, the pumping end surface base mould radius is size on an equal basis, has improved overall pump light absorption efficiency.
4, use titanium precious stone laser resonant cavity output beam quality height, adopt the exocoel seed light to inject simultaneously, can obtain narrow linewidth, narrow pulsewidth, the 910nm laser of high light beam quality satisfies the needs of practical application.
Description of drawings
Fig. 1 is the The general frame of high power narrow linewidth complete solid state pulse 910nm laser system of the present invention.
Fig. 2 is the light channel structure schematic diagram of titanium precious stone laser ring resonator among the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
See also Fig. 1 and Fig. 2 earlier, by Fig. 1 and Fig. 2 as can be seen, high power narrow linewidth complete solid state pulse 910nm laser system of the present invention, comprise the laser pumping system, titanium precious stone laser resonant cavity IV and exocoel seed light injected system V, described titanium precious stone laser resonant cavity IV is successively by an input and output level crossing 1, first plane mirror 2, the four mirror ring cavity structures that the concave mirror 4 and second plane mirror 3 are formed, on two smooth arms of described concave mirror 4, put first titanium gem crystal 5 and second titanium gem crystal 6 respectively, described laser pumping system is transferred the Nd:YAG laser I of Q by two covers, frequency multiplier II and pump beam shaping and coupled system III form, and the 532nm pump light of its output injects from the end face of described first titanium gem crystal 5 and second titanium gem crystal 6 respectively; Described exocoel seed light injected system V comprises that wavelength is the laser diode of 910nm, and the 910nm laser that this laser diode sends is injected by described input and output level crossing 1.
Described titanium gem crystal central axis is perpendicular to crystallographic axis c, two logical light end faces cut with Brewster's angle, and the normal and the crystallographic axis c of two logical optical surfaces are in the same plane, pump light becomes 61.2 ° of angles with the normal of the logical optical surface of titanium gem crystal, the logical light face normal of oscillation light exit direction and titanium gem crystal becomes 60.4 °, after the shaping of pump light process telescopic system, two titanium gem crystals are carried out both-end pumping, guarantee that pump energy density is lower than the damage threshold of crystal.
Inject along one road laser output of laserresonator by two 45 ° of plane total reflective mirrors by exocoel seed injected system V, can obtain the capable ripple running of titanium jewel resonant cavity, obtain narrow linewidth, high light beam quality, 910nm laser output efficiently, the live width of control output laser.
The following concrete enforcement parameter of example for this reason:
Pumping transfers the Nd:YAG laser of Q to export the single pulse energy 2000mJ of 1064nm wavelength, repetition rate 10Hz, the about 8ns of pulsewidth with two covers.Use the ktp crystal frequency multiplication, obtain 532nm green light pulse energy 1000mJ.Two block specifications are the titanium gem crystal of φ 10 * 20mm, upper laser level life-span τ
0=3.2 μ s, crystal is to the absorption coefficient=1.0cm of pump light
-1, quantum efficiency 90%, doping content N
0=3.33 * 10
19Cm
-3Pump light is adjusted to after the suitable spot size end pumping from two titanium gem crystals by pumping coupling system.Resonant cavity adopts four mirror annular chambers, wherein forms the long 1331mm in chamber by a plane total reflective mirror, concave mirror that is all-trans, two planes cutting mirror that is all-trans.Use the laser diode of 910nm single longitudinal mode to carry out the exocoel injection as seed light source.Rate equation analysis according to the four-level laser system is calculated, when energy is the 532nm green glow pumping of 1000mJ, can obtain this moment resonant cavity and can export 240mJ, pulsewidth is the 910nm pulse laser output of 18ns, and the Best Coupling output rating of outgoing mirror is 74.4%.
Shows that through on probation the present invention has compact conformation, volume is little, efficient is high, the life-span is long, characteristics such as working stability can be used for the laser of frequency multiplication generation 455nm, have wide practical use in space technology, air pollution detection and military field.
Claims (3)
1, a kind of high power narrow linewidth complete solid state pulse 910nm laser system, comprise the laser pumping system, titanium precious stone laser resonant cavity (IV) and exocoel seed light injected system (V), it is characterized in that described titanium precious stone laser resonant cavity (IV) is successively by an input and output level crossing (1), first plane mirror (2), the four mirror ring cavity structures that a concave mirror (4) and second plane mirror (3) are formed, on two smooth arms of described concave mirror (4), put first titanium gem crystal (5) and second titanium gem crystal (6) respectively, described laser pumping system is by the Nd:YAG laser (I) of transferring Q, frequency multiplier (II) and pump beam shaping and coupled system (III) are formed, and the 532nm pump light of this laser pumping system output injects from the end face of described first titanium gem crystal (5) and second titanium gem crystal (6) respectively; Described exocoel seed light injected system (V) comprises that wavelength is the laser diode of 910nm, and the 910nm laser that this laser diode sends is injected by described input and output level crossing (1).
2, the complete solid state pulse 910nm laser system of high power narrow linewidth according to claim 1, the central axis that it is characterized in that described first titanium gem crystal and second titanium gem crystal is respectively perpendicular to the crystallographic axis of described first titanium gem crystal and the crystallographic axis of described second titanium gem crystal, the two logical light end faces separately of described first titanium gem crystal and second titanium gem crystal cut with Brewster's angle, and the normal of the two logical light end faces separately of described first titanium gem crystal and second titanium gem crystal is in the same plane with the crystallographic axis of described first titanium gem crystal and the crystallographic axis of described second titanium gem crystal respectively, pump light becomes 61.2 ° of angles with the normal of the logical light end face separately of described first titanium gem crystal and second titanium gem crystal, the oscillation light exit direction becomes 60.4 ° of angles with the normal of the logical light end face separately of described first titanium gem crystal and second titanium gem crystal, after the shaping of pump light process telescopic system, described first titanium gem crystal and second titanium gem crystal are carried out both-end pumping, guarantee that pump energy density is lower than the damage threshold of described first titanium gem crystal and second titanium gem crystal.
3, the complete solid state pulse 910nm laser system of high power narrow linewidth according to claim 1 is characterized in that described laser pumping system transfers Nd:YAG laser (I), frequency multiplier (II) and pump beam shaping and the coupled systems (III) of Q to form by a cover or two covers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101188579A CN100442613C (en) | 2006-11-29 | 2006-11-29 | A high power narrow linewidth full solid state pulse 910nm laser system |
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| CNB2006101188579A CN100442613C (en) | 2006-11-29 | 2006-11-29 | A high power narrow linewidth full solid state pulse 910nm laser system |
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| CN1964144A CN1964144A (en) | 2007-05-16 |
| CN100442613C true CN100442613C (en) | 2008-12-10 |
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| CN106025783A (en) * | 2016-06-06 | 2016-10-12 | 中国工程物理研究院应用电子学研究所 | Q-switched pulse laser for quickly switching polarization states |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0339868A1 (en) * | 1988-04-25 | 1989-11-02 | Coherent, Inc. (a Delaware corporation) | Ring laser with improved beam quality |
| US5383198A (en) * | 1993-10-25 | 1995-01-17 | Cornell Research Foundation, Inc. | Self-starting mode-locked ring cavity laser |
| US5838701A (en) * | 1996-02-29 | 1998-11-17 | Lambda Physik Gesellschaft Zur Herstellung Von Lasern Mbh | Q-switched solid-state laser |
| US6483858B1 (en) * | 1999-11-23 | 2002-11-19 | Southeastern University Research Assn. | Injection mode-locking Ti-sapphire laser system |
| CN1243399C (en) * | 2002-04-04 | 2006-02-22 | 华东师范大学 | Ring laser device |
-
2006
- 2006-11-29 CN CNB2006101188579A patent/CN100442613C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0339868A1 (en) * | 1988-04-25 | 1989-11-02 | Coherent, Inc. (a Delaware corporation) | Ring laser with improved beam quality |
| US5383198A (en) * | 1993-10-25 | 1995-01-17 | Cornell Research Foundation, Inc. | Self-starting mode-locked ring cavity laser |
| US5838701A (en) * | 1996-02-29 | 1998-11-17 | Lambda Physik Gesellschaft Zur Herstellung Von Lasern Mbh | Q-switched solid-state laser |
| US6483858B1 (en) * | 1999-11-23 | 2002-11-19 | Southeastern University Research Assn. | Injection mode-locking Ti-sapphire laser system |
| CN1243399C (en) * | 2002-04-04 | 2006-02-22 | 华东师范大学 | Ring laser device |
Non-Patent Citations (1)
| Title |
|---|
| 大能量窄线宽全固态钛宝石激光器的研究进展. 戎善奎，余婷，陈卫标.激光与光电子学进展，第43卷第4期. 2006 * |
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