Optics: measuring and testing – By light interference – Spectroscopy
Reexamination Certificate
2007-02-13
2007-02-13
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
Spectroscopy
Reexamination Certificate
active
10514474
ABSTRACT:
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) for delaying 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.
REFERENCES:
patent: 6633386 (2003-10-01), Walmsley et al.
patent: 6859275 (2005-02-01), Fateley et al.
patent: 2002/0057431 (2002-05-01), Fateley et al.
patent: 2003/0025911 (2003-02-01), Walmsley et al.
patent: 2003/0062422 (2003-04-01), Fateley et al.
patent: 2005/0024640 (2005-02-01), Fateley et al.
patent: 2006/0056468 (2006-03-01), Dantus et al.
patent: 2002-131710 (2002-05-01), None
Hirasawa et al. “Femtosecond Optical-Pulse Characterization by a Modified-SPIDER Technique and Feedback Phase Control” Quantum Effects and Related Physical Phenomena, Abstracts; Dec. 2001, p. 54, TRANSLATION.
Hirasawa et al. “Sensitivity improvement of spectral phase interferometry for direct electric-field reconstruction for the characterization of low-intensity femtosecond puses” Jul. 16, 2002, Applied Physics B S225-S229.
Yamane et al. “Optical pulse compression to 3.4 fs in the monocycle region by feedback phase compensation” Nov. 15, 2003 Optics Letters, vol. 28, No. 22, pp. 2258-2260.
M. Hirasawa et al.; “1-5-2 Kodo Henkei SPIDER-ho niyoru Femto-Byo Hikari-Pulse no Iso Kettei to Feedback Iso Seigyo”, Ryoshi Koka To no Butsuri Gensho, Yokoshu, 2001, No. 12, p. 54. Cited in the int'l. search report.
M. Hirasawa et al.; “27a-ZE-6 Kokando Henkei SPIDER-ho niyoru Hikari-Pulse no Iso Kettei to Feedback Chirp-hosho”, Dai 49, Kai Oyo Butsuri Kankei Rengo Koenkai Koen Yokoshu, Mar. 27, 2002, separate vol. 3, p. 1061. Cited in the int'l. search report.
M. Hirasawa et al.; “11p-P4-10 Kokando Henkei SPIDER Iso Sokuteiho niyoru Teikyodo Hikari-Fiber Shursuryoku Pulse no Keisoku”, Dai 62 Kai Extended abstracts; the Japan Society of Applied Physics, 2001, 09, separate vol. 3, p. 815. Cited in the int'l. search report.
Reimei Ri et al.; “SPIDER niyoru 5.0fs Hikari-Pulse no Furihaba Iso Sokutei”, Dai 48 Kai Oyo Butsuri Kankei Rengo Gakkai Koenkai Koen Yokoshu, 2001. 03, separate vol. 3, p. 1091. Cited in the int'l. search report.
Hirasawa Masakatsu
Yamashita Mikio
Connolly Patrick
Japan Science and Technology Agency
Toatley , Jr. Gregory J.
Westerman, Hattori, Daniels & Adrian , LLP.
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