WO2009004698A1 - Optical amplifier and its control method - Google Patents

Optical amplifier and its control method Download PDF

Info

Publication number
WO2009004698A1
WO2009004698A1 PCT/JP2007/063171 JP2007063171W WO2009004698A1 WO 2009004698 A1 WO2009004698 A1 WO 2009004698A1 JP 2007063171 W JP2007063171 W JP 2007063171W WO 2009004698 A1 WO2009004698 A1 WO 2009004698A1
Authority
WO
WIPO (PCT)
Prior art keywords
excitation light
supply unit
light supply
wavelength
optical amplifier
Prior art date
Application number
PCT/JP2007/063171
Other languages
French (fr)
Japanese (ja)
Inventor
Shinya Inagaki
Kazunori Miura
Kaoru Moriya
Original Assignee
Fujitsu Limited
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 Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2007/063171 priority Critical patent/WO2009004698A1/en
Publication of WO2009004698A1 publication Critical patent/WO2009004698A1/en

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
    • H01S3/06754—Fibre amplifiers
    • 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
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094096—Multi-wavelength pumping
    • 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
    • H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • H01S3/1001—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by controlling the optical pumping
    • 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
    • H01S3/1301—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers
    • H01S3/13013—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers by controlling the optical pumping
    • 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
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0078—Frequency filtering
    • 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
    • H01S3/10—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
    • H01S3/1305—Feedback control systems

Abstract

Provided is an optical amplifier which can avoid output interruption as an optical amplifier even if optical output of excitation light is interrupted. The optical amplifier includes an amplification medium (2), a first excitation light supply unit (3), a second excitation light supply unit (4), a wavelength control unit (6) for varying and controlling the wavelength of the excitation light supplied by the second excitation light supply unit (4), and a monitor unit (5) which monitors the excitation light supplied by the first excitation light supply unit (3). The amplification medium (2) has an optical filter (7) for cutting off the excitation light of a reference wavelength band in a second wavelength band supplied from the output direction. According to the monitor result obtained by the monitor unit (5), the wavelength control unit (6) sets the wavelength of the excitation light supplied by the second excitation light supply unit (4) to be the reference wavelength band if the first excitation light supply unit (3) is in a normal operation state and controls the wavelength of the excitation light supplied by the second excitation light supply unit (4) to be out of the reference wavelength band if the first excitation light supply unit (3) is in an abnormal operation state.
PCT/JP2007/063171 2007-06-29 2007-06-29 Optical amplifier and its control method WO2009004698A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/063171 WO2009004698A1 (en) 2007-06-29 2007-06-29 Optical amplifier and its control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/063171 WO2009004698A1 (en) 2007-06-29 2007-06-29 Optical amplifier and its control method

Publications (1)

Publication Number Publication Date
WO2009004698A1 true WO2009004698A1 (en) 2009-01-08

Family

ID=40225768

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/063171 WO2009004698A1 (en) 2007-06-29 2007-06-29 Optical amplifier and its control method

Country Status (1)

Country Link
WO (1) WO2009004698A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3672113A1 (en) * 2018-12-21 2020-06-24 Fujitsu Limited Wavelength conversion device and excitation light switching method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06318754A (en) * 1993-05-10 1994-11-15 Matsushita Electric Ind Co Ltd Optical fiber amplifier and light signal transmission system
JPH06326383A (en) * 1993-05-13 1994-11-25 Sumitomo Electric Ind Ltd Optical fiber amplifier
JPH0915663A (en) * 1995-06-28 1997-01-17 Hitachi Cable Ltd Optical fiber amplifier
JPH09181382A (en) * 1995-12-19 1997-07-11 Lucent Technol Inc Optical amplifier
JP2001135881A (en) * 2000-09-29 2001-05-18 Fujitsu Ltd Optical amplifier
JP2002217477A (en) * 2000-12-22 2002-08-02 Alcatel Optical amplifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06318754A (en) * 1993-05-10 1994-11-15 Matsushita Electric Ind Co Ltd Optical fiber amplifier and light signal transmission system
JPH06326383A (en) * 1993-05-13 1994-11-25 Sumitomo Electric Ind Ltd Optical fiber amplifier
JPH0915663A (en) * 1995-06-28 1997-01-17 Hitachi Cable Ltd Optical fiber amplifier
JPH09181382A (en) * 1995-12-19 1997-07-11 Lucent Technol Inc Optical amplifier
JP2001135881A (en) * 2000-09-29 2001-05-18 Fujitsu Ltd Optical amplifier
JP2002217477A (en) * 2000-12-22 2002-08-02 Alcatel Optical amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3672113A1 (en) * 2018-12-21 2020-06-24 Fujitsu Limited Wavelength conversion device and excitation light switching method
US11243349B2 (en) 2018-12-21 2022-02-08 Fujitsu Limited Wavelength conversion device and excitation light switching method

Similar Documents

Publication Publication Date Title
WO2007104022A3 (en) Dual-parallel-mz modulator bias control
CA2618526A1 (en) Fiber pulse laser apparatus and method of control the same
TW200710646A (en) Controlling power supply to a storage device
TW200734149A (en) Wire saw ingot slicing system and method with ingot preheating, web preheating, slurry temperature control and/or slurry flow rate control
WO2009083096A8 (en) Control system for a mill and method for operating a mill
WO2008135895A3 (en) System for controlling light sources
WO2006007756A3 (en) Not temperature stabilized pulsed laser diode and all fibre power amplifier
WO2012087563A3 (en) Control arrangement and method of controlling a transmission in a machine
EP1215527A4 (en) Light amplifier using raman amplification and control method thereof
WO2006118886A3 (en) Controlling an output while receiving a user input
EP1139521A4 (en) Light source and wavelength stabilization control method, exposure apparatus and exposure method, method for producing exposure apparatus, and device manufacturing method and device
EP2161800A4 (en) A method and system for controlling wavelengths of multi-path lasers
JP2008227992A5 (en)
ATE506744T1 (en) METHOD FOR CONTROLLING A LINEAR AMPLIFIER AND POWER AMPLIFIER ARRANGEMENT
CA2653620A1 (en) Wavelength sweep control
CA2433761A1 (en) Control scheme for long wavelength channels in wideband wdm optical fiber transmission system
WO2007024620A3 (en) Controlling media devices to output signals
EP1330055A3 (en) Raman amplifier and wavelength division multiplexing optical communication system
CA2649501A1 (en) Improved feedback dynamic gain control for a wdm system employing multi-wavelength-pumped raman fiber amplifiers
EP1940066A3 (en) Optical switching method and optical switch
TW200705758A (en) Femtosecond laser device having output stabilizing mechanism
WO2015122375A3 (en) Laser light-source apparatus and laser pulse light generating method
MXPA05013258A (en) Multi-wavelength cd and pmd compensator.
WO2009004698A1 (en) Optical amplifier and its control method
JP2004258622A (en) Raman amplifier and optical communication system including the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07767952

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07767952

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP