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Autonomous ultra-short optical pulse compression, phase compensating and waveform shaping device

外国特許コード F110005051
整理番号 A041-47US
掲載日 2011年8月18日
出願国 アメリカ合衆国
出願番号 51447402
公報番号 20060033923
公報番号 7177027
出願日 平成14年12月9日(2002.12.9)
公報発行日 平成18年2月16日(2006.2.16)
公報発行日 平成19年2月13日(2007.2.13)
国際出願番号 JP2002012855
国際公開番号 WO2003098328
国際出願日 平成14年12月9日(2002.12.9)
国際公開日 平成15年11月27日(2003.11.27)
優先権データ
  • 特願2002-143884 (2002.5.17) JP
  • 2002WO-JP12855 (2002.12.9) WO
発明の名称 (英語) Autonomous ultra-short optical pulse compression, phase compensating and waveform shaping device
発明の概要(英語) (US7177027)
Disclosed is an apparatus for autonomously compressing, phase-compensating and waveform-shaping an ultrashort light pulse that is fast and high in sensitivity in compensating for phase fluctuations and allows the use of a usual laser light source that is low in light intensity and has large temporal fluctuations in phase.
The apparatus comprises: a pulsed light source ( 2 ); a spectroscopic spatial dispersing device ( 4 ) for spatially dispersing a light pulse ( 3 ) emitted from the pulsed light source ( 2 ) into spectral components thereof; a spatial light modulator ( 5 ) for adding a phase to each of the spectral components of the spatially dispersed light pulse ( 3 ); a multiplexer ( 6 ) for combining the phase added spectral components of the light pulse ( 3 ) together to form a composite output light pulse ( 7 ); a modified SPIDER device ( 8 ) for forming a spectral interference figure from a portion of the composite output light pulse ( 7 ); and a feedback device ( 9 ) for detecting a spectral phase from the spectral interference figure and feeding a signal representing a difference between the detected spectral phase and a pre-established phase back to the spatial light modulator ( 5 ).
The modified SPIDER device ( 8 ) comprises: a pulsed light source for a chirped light pulse ( 8 a); a delay unit ( 8 c) for delaying a light pulse ( 8 b) from the pulsed light source ( 8 a) with an adjustable delay time; a dispersive medium ( 28 ) for forming a chirped light pulse ( 29 ) from the light pulse whose delay time is adjusted by the delay unit ( 8 c); a replica pulse former ( 24 ) for forming from a portion of the output light pulse ( 7 ) a pair of replica light pulses ( 24 a, 24 b) one delayed after the other; a nonlinear optical crystal ( 31 ) for frequency-mixing the two replica pulses ( 24 a, 24 b) with the chirped light pulse ( 29 ); a spectrometer ( 8 e) for forming an interference figure of the resultant two frequency-mixed replica light pulses; and an image reader ( 8 f) for reading the interference figure of the two frequency-mixed replica light pulses.
特許請求の範囲(英語) [claim1]
1. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus, characterized in that it comprises: a pulsed light source;
a spectroscopic spatial dispersing device for spatially dispersing a light pulse emitted from the pulsed light source into spectral components thereof;a spatial light modulator for adding a phase to each of the spectral components of the spatially dispersed light pulse;a multiplexer for combining the phase added spectral components of the light pulse together to form a composite output light pulse;a modified SPIDER device for forming a spectral interference figure from a portion of the composite output light pulse;
and
a feedback device for detecting a spectral phase from the spectral interference figure and feeding a signal representing a difference between the detected spectral phase and a pre-established phase back to said spatial light modulator.
[claim2]
2. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 1, characterized in that said modified SPIDER device comprises: a pulsed light source for a chirped light pulse;
a delay unit for delaying a light pulse from the pulsed light source with an adjustable delay time;an optical dispersive medium for forming a frequency chirped light pulse from the light pulse whose delay time is adjusted by the delay unit;a replica pulse former for forming from a portion of said output light pulse a pair of replica light pulses one delayed after the other;a nonlinear optical crystal for frequency-mixing the two replica pulses with the chirped light pulse;a spectrometer for forming an interference figure of the two frequency-mixed replica light pulses from said nonlinear optical crystal;
and
an image reader for reading the interference figure of said two replica light pulses.
[claim3]
3. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 1, characterized in that said pulsed light source includes a nonlinear optical dispersive medium, transmitting through which, a light pulse generated by the light source is broad-banded to form the light pulse.
[claim4]
4. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 2, characterized in that said optical dispersive medium comprises a TF5 glass that excels in group velocity dispersion.
[claim5]
5. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 2, characterized in that said nonlinear optical crystal comprises a BBO crystal that excels in secondary nonlinear optical effect.
[claim6]
6. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 2, characterized in that said image reader comprises an ICCD.
[claim7]
7. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus comprising: a pulsed light source:said pulsed light source includes an optical nonlinear dispersive medium, transmitting through which, a light pulse generated by the pulsed light source is broad-banded to form the light pulse,a spectroscopic spatial dispersing device for spatially dispersing a light pulse emitted from the pulsed light source into spectral components thereof;a spatial light modulator for adding a phase to each of the spectral components of the spatially dispersed light pulse;a multiplexer for combining the phase added spectral components of the light pulse together to form a composite output light pulse;a modified SPIDER device for forming a spectral interference figure from a portion of the composite output light pulse;
and
a feedback device for detecting a spectral phase from the spectral interference figure and feeding a signal representing a difference between the detected spectral phase and a pre-established phase back to said spatial light modulator, wherein said modified SPIDER device comprises:a pulsed light source for chirped light pulse;a delay unit for delaying a light pulse from the pulsed light source with an adjustable delay time;an optical dispersive medium for forming a frequency chirped light pulse from the light pulse whose delay time is adjusted by the delay unit;a replica pulse former for forming from a portion of said output light pulse a pair of replica light pulses one delayed after the other;a nonlinear optical crystal for frequency-mixing the two replica pulses with the chirped light pulse;a spectrometer for forming an interference figure of the two frequency-mixed replica light pulses from said nonlinear optical crystal;
and
an image reader for reading the interference figure of said two replica light pulses.
[claim8]
8. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 7, characterized in that said optical dispersive medium comprises a TF5 glass that excels in group velocity dispersion.
[claim9]
9. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 7, characterized in that said nonlinear optical crystal comprises a BBO crystal that excels in secondary nonlinear optical effect.
[claim10]
10. An autonomous ultrashort light pulse compression, phase compensation and waveform shaping apparatus as set forth in claim 7, characterized in that said image reader comprises an ICCD.
  • 発明者/出願人(英語)
  • HIRASAWA MASAKATSU
  • YAMASHITA MIKIO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 356/451
参考情報 (研究プロジェクト等) CREST Quantum Effects and Related Physical Phenomena AREA
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