WO2003030311A3 - Method and system for locking transmission wavelengths for lasers in a dense wavelength multiplexer utilizing a tunable etalon - Google Patents

Method and system for locking transmission wavelengths for lasers in a dense wavelength multiplexer utilizing a tunable etalon Download PDF

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Publication number
WO2003030311A3
WO2003030311A3 PCT/US2002/030667 US0230667W WO03030311A3 WO 2003030311 A3 WO2003030311 A3 WO 2003030311A3 US 0230667 W US0230667 W US 0230667W WO 03030311 A3 WO03030311 A3 WO 03030311A3
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WO
WIPO (PCT)
Prior art keywords
etalon
wavelength
transmission
laser
wtl
Prior art date
Application number
PCT/US2002/030667
Other languages
French (fr)
Other versions
WO2003030311A2 (en
Inventor
Randy Dean May
Original Assignee
Spectra Sensors Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spectra Sensors Inc filed Critical Spectra Sensors Inc
Priority to AU2002362396A priority Critical patent/AU2002362396A1/en
Priority to EP02800371A priority patent/EP1436864A4/en
Publication of WO2003030311A2 publication Critical patent/WO2003030311A2/en
Publication of WO2003030311A3 publication Critical patent/WO2003030311A3/en

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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
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/0687—Stabilising the frequency of the laser
    • 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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1303—Stabilisation of laser output parameters, e.g. frequency or amplitude by using a passive reference, e.g. absorption cell
    • 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
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/0617—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium using memorised or pre-programmed laser characteristics
    • 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
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4087—Array arrangements, e.g. constituted by discrete laser diodes or laser bar emitting more than one wavelength

Abstract

The method and system operate to calibrate a transmission laser of the dense wavelength division multiplexer (DWDM) and to lock the laser to a selected transmission wavelength. In one example, the transmission laser is a widely tunable laser 'WTL' (401) to be tuned to one of a set of international telecommunications union 'ITU' transmission grid lines for transmission through an optic fiber. To lock the WTL (401) to an ITU grid line, a portion of the output beam from the WTL (401) is routed through the etalon (620) to split the beam into a set of transmission lines for detection by an etalon fringe detector (624). Another portion of the beam is routed directly to a laser wavelength detector (626). A wavelength-locking controller (628) compares signals from the two detectors (626, 628) and adjusts the temperature of the etalon (620) to align the wavelength of one of the transmission lines of the etalon (620) with the wavelength of the output beam, then controls the WTL (401) in a feedback loop (606) to lock the laser to the etalon line. The wavelength-locking controller (628) thereafter monitors the temperature of the etalon (620) and keeps the temperature constant to prevent any wavelength drift in the etalon (628).
PCT/US2002/030667 2001-09-28 2002-09-26 Method and system for locking transmission wavelengths for lasers in a dense wavelength multiplexer utilizing a tunable etalon WO2003030311A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002362396A AU2002362396A1 (en) 2001-09-28 2002-09-26 Method and system for locking transmission wavelengths for lasers in a dense wavelength multiplexer utilizing a tunable etalon
EP02800371A EP1436864A4 (en) 2001-09-28 2002-09-26 Method and system for locking transmission wavelengths for lasers in a dense wavelength multiplexer utilizing a tunable etalon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/966,152 US6693928B2 (en) 2000-10-10 2001-09-28 Technique for filtering chirp from optical signals
US09/966,152 2001-09-28

Publications (2)

Publication Number Publication Date
WO2003030311A2 WO2003030311A2 (en) 2003-04-10
WO2003030311A3 true WO2003030311A3 (en) 2003-08-21

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PCT/US2002/030667 WO2003030311A2 (en) 2001-09-28 2002-09-26 Method and system for locking transmission wavelengths for lasers in a dense wavelength multiplexer utilizing a tunable etalon

Country Status (4)

Country Link
US (1) US6693928B2 (en)
EP (1) EP1436864A4 (en)
AU (1) AU2002362396A1 (en)
WO (1) WO2003030311A2 (en)

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Also Published As

Publication number Publication date
EP1436864A4 (en) 2006-03-15
US20020041611A1 (en) 2002-04-11
AU2002362396A1 (en) 2003-04-14
WO2003030311A2 (en) 2003-04-10
EP1436864A2 (en) 2004-07-14
US6693928B2 (en) 2004-02-17

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