JP2005209679A - レーザー増幅装置 - Google Patents
レーザー増幅装置 Download PDFInfo
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- JP2005209679A JP2005209679A JP2004011482A JP2004011482A JP2005209679A JP 2005209679 A JP2005209679 A JP 2005209679A JP 2004011482 A JP2004011482 A JP 2004011482A JP 2004011482 A JP2004011482 A JP 2004011482A JP 2005209679 A JP2005209679 A JP 2005209679A
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- laser
- ytterbium
- semiconductor laser
- semiconductor
- yag crystal
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- 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
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
- H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
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- 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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state lasers
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- 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
- H01S3/094049—Guiding of the pump light
- H01S3/094053—Fibre coupled pump, e.g. delivering pump light using a fibre or a fibre bundle
-
- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1618—Solid materials characterised by an active (lasing) ion rare earth ytterbium
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- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/163—Solid materials characterised by a crystal matrix
- H01S3/164—Solid materials characterised by a crystal matrix garnet
- H01S3/1643—YAG
Abstract
レーザー材料の増幅動作の指標であるレーザー発振動作時における励起エネルギー増加分に対する出力エネルギー増加分の割合を表すスロープ効率は、イッテルビウムヤグレーザーの場合、理論限界が約90%と極めて高くとれることが大きな利点の1つであるが、実際には約60% 程度にとどまっており、レーザー結晶内の光損失が大きく効率よいレーザー増幅ができていない。
【解決手段】
半導体レーザーで励起されたイッテルビウム添加ヤグ結晶を絶対温度8K~230K間の任意の温度に冷却することによる高効率のレーザー増幅方法及び装置。
【選択図】 図1
Description
A. Giesen, H. Hugel, A. Voss, K. Wittig, U. Brauch, H. Opower, "Scalable concept for diode-pumped high-power solid-state lasers," Applied Pysics B (Springer-Verlag), Vol. 58, pp. 365-372 (1994). T. Kasamatsu, H. Sekita and Y. Kuwano, "Temperature dependence and optimization of 970 nm diode-pumped Yb:YAG and Yb:LuAG lasers," Applied Optics (Optical Society of America, OSA), Vol. 38, No. 24, pp. 5149-5153 (August 20, 1999) J. Kawanaka, K. Yamakawa, H. Nishioka and K. Ueda, "Improved high-field laser characteristics of a diode-pumped Yb:LiYF4 crystal at low temperature," Optics Express (Optical Society of America, OSA), Vol. 10, No. 10, pp. 445-460 (May 20, 2002).
レーザー発振器や増幅器は、共振器の光損失や結晶表面の反射による光損失、結晶そのものの吸収による損失など、多種にわたる光損失をレーザー媒質による光利得が上回ったときに初めてレーザー発振又は増幅が行われることになる。レーザー媒質による光利得は、励起エネルギーと共に増加するので、図3に示されるように、励起エネルギーをゼロから増加させていくとある励起エネルギー(あるしきい値エネルギー)でレーザー発振又は増幅が起こる。
2 銅板
3 冷却部
4 半導体レーザー
5 集光光学系
6 共振器鏡
7 レーザー増幅装置
8 共振器鏡
9 真空槽
10 ファイバー出力を有する半導体レーザーの光ファイバー部
Claims (7)
- 半導体レーザーで励起されたイッテルビウム添加ヤグ結晶(Yb3+:Y3Al5O12)を低温に冷却することにより高効率のレーザー増幅動作を可能にするレーザー増幅装置。
- 半導体レーザーで励起されたイッテルビウム添加ヤグ結晶を絶対温度8〜230K、好ましくは8〜100Kの任意の温度に冷却することによる高効率のレーザー増幅方法。
- 請求項1のレーザー増幅装置とそのレーザー増幅装置を挟んで配置された共振器鏡からなるレーザー共振器とを用いたレーザー発振器。
- ファイバー出力を有する半導体レーザーで励起されたイッテルビウム添加ヤグ結晶を低温に冷却することにより高効率のレーザー増幅動作を可能にするレーザー増幅装置。
- ファイバー出力を有する半導体レーザーで励起されたイッテルビウム添加ヤグ結晶を絶対温度8〜230K、好ましくは8〜100Kの任意の温度に冷却することによる高効率のレーザー増幅方法。
- 請求項4のレーザー増幅装置とそのレーザー増幅装置を挟んで配置された共振器鏡からなるレーザー共振器とを用いたレーザー発振器。
- 半導体レーザー、半導体レーザー通過用光ファイバー、光ファイバーを通過した半導体レーザーを集光する光学系、及び集光された半導体レーザーで励起される固体レーザー発振器から構成されるレーザー発生装置において、
前記レーザー発振器が、イッテルビウム添加ヤグ結晶から成るレーザー増幅器とそのレーザー増幅器を挟んで配置された共振器鏡とから構成され、前記結晶を8〜230K、好ましくは8〜100K以下に冷却して結晶の光損失を減少させるとともにそのレーザー利得を増加させることにより、これらの相乗効果で結晶のレーザー増幅性能を高めることを特徴とする、前記装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004011482A JP2005209679A (ja) | 2004-01-20 | 2004-01-20 | レーザー増幅装置 |
US11/037,465 US20050232318A1 (en) | 2004-01-20 | 2005-01-19 | Laser amplifier |
Applications Claiming Priority (1)
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---|---|---|---|
JP2004011482A JP2005209679A (ja) | 2004-01-20 | 2004-01-20 | レーザー増幅装置 |
Publications (1)
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JP2005209679A true JP2005209679A (ja) | 2005-08-04 |
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JP2004011482A Pending JP2005209679A (ja) | 2004-01-20 | 2004-01-20 | レーザー増幅装置 |
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US (1) | US20050232318A1 (ja) |
JP (1) | JP2005209679A (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005094275A2 (en) | 2004-03-25 | 2005-10-13 | Imra America, Inc. | Optical parametric amplification, optical parametric generation, and optical pumping in optical fibers systems |
US8023538B2 (en) * | 2008-03-27 | 2011-09-20 | Imra America, Inc. | Ultra-high power parametric amplifier system at high repetition rates |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5615043A (en) * | 1993-05-07 | 1997-03-25 | Lightwave Electronics Co. | Multi-pass light amplifier |
JP3389197B2 (ja) * | 2000-04-19 | 2003-03-24 | 三菱重工業株式会社 | レーザ波長変換装置 |
-
2004
- 2004-01-20 JP JP2004011482A patent/JP2005209679A/ja active Pending
-
2005
- 2005-01-19 US US11/037,465 patent/US20050232318A1/en not_active Abandoned
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