KR100252008B1 - 제2고조파 발생방법 및 장치 - Google Patents
제2고조파 발생방법 및 장치 Download PDFInfo
- Publication number
- KR100252008B1 KR100252008B1 KR1019930023905A KR930023905A KR100252008B1 KR 100252008 B1 KR100252008 B1 KR 100252008B1 KR 1019930023905 A KR1019930023905 A KR 1019930023905A KR 930023905 A KR930023905 A KR 930023905A KR 100252008 B1 KR100252008 B1 KR 100252008B1
- Authority
- KR
- South Korea
- Prior art keywords
- temperature
- output
- signal
- optical element
- harmonic
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 96
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- WYOHGPUPVHHUGO-UHFFFAOYSA-K potassium;oxygen(2-);titanium(4+);phosphate Chemical compound [O-2].[K+].[Ti+4].[O-]P([O-])([O-])=O WYOHGPUPVHHUGO-UHFFFAOYSA-K 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/37—Non-linear optics for second-harmonic generation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Head (AREA)
Abstract
Description
Claims (5)
- 고조파광출력량을 검출하여 광출력설정치와의 비교를 통하여 비선형광학소자의 온도를 제어함으로써 일정한 광출력을 얻어내는 제2고조파발생방법에 있어서, 상기 비선형광학소자의 온도를 검출하여 온도설정치와의 비교를 통하여 소정의 온도범위에 있는 경우에만 상기 광출력량에 의한 광출력제어를 수행함으로써 안정한 제2고조파에 의한 광출력만을 출력시키는 것을 특징으로 하는 제2고조파발생방법.
- 제1항에 있어서, 상기 온도범위는 비선형광학소자에서 출력되는 제2고조파의 광출력피크가 최대치인 제2피크온도에서부터 제2고조파 광출력피크가 다음으로 높은 제1피크온도까지임을 특징으로 하는 게2고조파발생방법.
- 광출력을 발생시키는 비선형광학소자; 상기 비선형광학소자에 부착되어 있어서 상기 비선형광학소자의 온도를 조절할 수 있도록 하는 전자냉각기; 상기 비선형광학소자로부터의 광출력을 전류신호로 변환시켜주는 광변환소자; 상기 비선형광학소자에 부착되어 온도에 따라 전기저항이 변하여 온도를 감지할 수 있는 온도센서; 상기 광변환소자로부터의 전류신호를 입력으로 하여 광출력량을 검출하고 검출된 광출력량과 소정의 광출력설정치와의 제1비교신호를 출력하는 광출력비교수단; 상기 온도센서로부터의 전기저항의 변화를 이용하여 온도를 검출하고 검출된 온도와 소정의 온도설정치와의 제2비교신호를 출력하는 온도비교수단; 상기 제2비교신호를 입력으로 하여 상기 제2비교신호가 일정범위내에 있는 경우 제1제어신호를 출력하고, 일정범위밖에 있는 경우에는 제2제어신호를 출력하는 온도범위판단수단; 상기 제1제어신호에 응답하여 상기 제1비교신호를 선택하고, 상기 제2제어신호에 응답하여 상기 제2비교신호를 선택한후 선태된 신호에 비례하는 양의 전압을 출력하는 선택출력수단; 및 상기 선택출력수단을 통하여 입력되는 출력전압에 따라 선형적으로 구동전압을 상기 전자냉각기로 제공하여 줌으로써 전자냉각기를 구동시키는 전자냉각기 구동수단을 구비하여 광출력을 제어하는 것을 특징으로 하는 제2고조파출력장치.
- 제3항에 있어서, 상기 온도비교수단은 상기 온도센서의 온도에 따른 저항값을 출력임피던스로 사용함으로써 온도값에 따른 전압신호를 증폭하기 위한 증폭수단; 상기 전압신호를 소정의 전압과 비교하여 그 비교값을 출력하기 위한 비교수단을 구비한 것을 특징으로 하는 제2고조파발생장치.
- 제3항에 있어서, 상기 선택출력수단은 상기 제1제어신호에 응답하여 상기 제1비교신호를 출력시키고, 상기 제2제어신호에 응답하여 상기 제2비교신호를 출력시키기 위한 스위칭수단; 및 상기 스위칭수단을 통하여 전달되는 신호를 입력으로 하여 상기 신호에 대한 적분량을 출력시키는 비례적분기를 구비한 것을 특징으로 하는 제2고조파발생장치.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930023905A KR100252008B1 (ko) | 1993-11-11 | 1993-11-11 | 제2고조파 발생방법 및 장치 |
US08/321,708 US5521375A (en) | 1993-11-11 | 1994-10-12 | Method and apparatus for controlling the output level of a second harmonic generator by temperature compensation |
JP6266697A JPH07182681A (ja) | 1993-11-11 | 1994-10-31 | 第2高調波発生方法及びその装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930023905A KR100252008B1 (ko) | 1993-11-11 | 1993-11-11 | 제2고조파 발생방법 및 장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950015226A KR950015226A (ko) | 1995-06-16 |
KR100252008B1 true KR100252008B1 (ko) | 2000-05-01 |
Family
ID=19367807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930023905A KR100252008B1 (ko) | 1993-11-11 | 1993-11-11 | 제2고조파 발생방법 및 장치 |
Country Status (3)
Country | Link |
---|---|
US (1) | US5521375A (ko) |
JP (1) | JPH07182681A (ko) |
KR (1) | KR100252008B1 (ko) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100322691B1 (ko) * | 1995-01-27 | 2002-05-13 | 윤종용 | 제2고조파발생장치 |
EP0733894B1 (en) * | 1995-03-24 | 2003-05-07 | Nohmi Bosai Ltd. | Sensor for detecting fine particles such as smoke |
JPH10181098A (ja) * | 1996-12-26 | 1998-07-07 | Minolta Co Ltd | 電気光学素子駆動装置 |
US5783909A (en) * | 1997-01-10 | 1998-07-21 | Relume Corporation | Maintaining LED luminous intensity |
JP3212931B2 (ja) * | 1997-11-26 | 2001-09-25 | 日本電気株式会社 | 波長変換方法及び波長変換素子 |
JP2001042369A (ja) * | 1999-07-27 | 2001-02-16 | Ushio Sogo Gijutsu Kenkyusho:Kk | 波長変換ユニット |
US6792015B1 (en) * | 2000-12-29 | 2004-09-14 | Cisco Technology, Inc. | Thermo-electric cooler circuit and method for DWDM/TDM mode selection |
JP5388913B2 (ja) * | 2010-03-15 | 2014-01-15 | 三菱電機株式会社 | 画像表示装置 |
US10141492B2 (en) | 2015-05-14 | 2018-11-27 | Nimbus Materials Inc. | Energy harvesting for wearable technology through a thin flexible thermoelectric device |
US10566515B2 (en) | 2013-12-06 | 2020-02-18 | Sridhar Kasichainula | Extended area of sputter deposited N-type and P-type thermoelectric legs in a flexible thin-film based thermoelectric device |
US11024789B2 (en) | 2013-12-06 | 2021-06-01 | Sridhar Kasichainula | Flexible encapsulation of a flexible thin-film based thermoelectric device with sputter deposited layer of N-type and P-type thermoelectric legs |
US20180090660A1 (en) | 2013-12-06 | 2018-03-29 | Sridhar Kasichainula | Flexible thin-film based thermoelectric device with sputter deposited layer of n-type and p-type thermoelectric legs |
US10290794B2 (en) | 2016-12-05 | 2019-05-14 | Sridhar Kasichainula | Pin coupling based thermoelectric device |
US10367131B2 (en) | 2013-12-06 | 2019-07-30 | Sridhar Kasichainula | Extended area of sputter deposited n-type and p-type thermoelectric legs in a flexible thin-film based thermoelectric device |
US11276810B2 (en) | 2015-05-14 | 2022-03-15 | Nimbus Materials Inc. | Method of producing a flexible thermoelectric device to harvest energy for wearable applications |
US11283000B2 (en) | 2015-05-14 | 2022-03-22 | Nimbus Materials Inc. | Method of producing a flexible thermoelectric device to harvest energy for wearable applications |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3858056A (en) * | 1974-01-22 | 1974-12-31 | Westinghouse Electric Corp | Means and method for stabilized optimized temperature phase matched optical parametric generation |
DE4039371C2 (de) * | 1990-12-10 | 2000-05-31 | Zeiss Carl Fa | Einrichtung zur Stabilisierung der Wellenlänge einer Laserdiode |
US5093832A (en) * | 1991-03-14 | 1992-03-03 | International Business Machines Corporation | Laser system and method with temperature controlled crystal |
US5181214A (en) * | 1991-11-18 | 1993-01-19 | Harmonic Lightwaves, Inc. | Temperature stable solid-state laser package |
AU659270B2 (en) * | 1992-02-20 | 1995-05-11 | Sony Corporation | Laser light beam generating apparatus |
-
1993
- 1993-11-11 KR KR1019930023905A patent/KR100252008B1/ko not_active IP Right Cessation
-
1994
- 1994-10-12 US US08/321,708 patent/US5521375A/en not_active Expired - Fee Related
- 1994-10-31 JP JP6266697A patent/JPH07182681A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US5521375A (en) | 1996-05-28 |
KR950015226A (ko) | 1995-06-16 |
JPH07182681A (ja) | 1995-07-21 |
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