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AUTONOMOUS ULTRASHORT LIGHT PULSE COMPRESSION, PHASE COMPENSATION AND WAVEFORM SHAPING APPARATUS

外国特許コード F110004263
整理番号 A041-47CA
掲載日 2011年7月13日
出願国 カナダ
出願番号 2486246
公報番号 2486246
公報番号 2486246
出願日 平成14年12月9日(2002.12.9)
公報発行日 平成15年11月27日(2003.11.27)
公報発行日 平成20年12月2日(2008.12.2)
優先権データ
  • 特願2002-143884 (2002.5.17) JP
発明の名称 (英語) AUTONOMOUS ULTRASHORT LIGHT PULSE COMPRESSION, PHASE COMPENSATION AND WAVEFORM SHAPING APPARATUS
発明の概要(英語)

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 (8a)

a delay unit (8c) fordelaying a light pulse (8b) from the pulsed light source (8a) 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 (8c)

a replica pulse former (24) for forming from a portion of the output light pulse (7) a pair of replica light pulses (24a, 24b) one delayed after the other

a nonlinear optical crystal (31) for frequency-mixing the two replica pulses (24a, 24b) with the chirped light pulse (29)

a spectrometer (8e) for forming an interference figure of the resultant two frequency-mixed replica light pulses

and an image reader (8f) for reading the interference figure of the two frequency-mixed replica light pulses.

  • 出願人(英語)
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • 発明者(英語)
  • YAMASHITA, MIKIO,
  • HIRASAWA, MASAKATSU
国際特許分類(IPC)
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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