Temporal contrast enhancement of femtosecond pulses by a self-diffraction process in a bulk Kerr medium

Liu, Jun; Okamura, Kotaro; Kida, Yuichiro; Kobayashi, Takayoshi

doi:10.1364/oe.18.022245

Cited by 60 publications

(45 citation statements)

References 33 publications

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“…The SD process is a degenerated cascaded four-wave mixing (DCFWM) process [21][22][23] . It acts as a temporal gating to improve the temporal contrast of a laser pulse.…”

Section: Principle and Experimental Setupmentioning

confidence: 99%

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Linear angular dispersion compensation of cleaned self-diffraction light with a single prism

Shen

Wang

Liu

et al. 2018

High Pow Laser Sci Eng

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The linear angular dispersion of a self-diffraction (SD) pulse, from a femtosecond laser pulse cleaning device, is compensated for by the use of a single prism. More than 500 µJ first-order SD pulse has a contrast of 10 12 , which is about five orders of magnitude improvement from the input fundamental pulse. The wings of the distribution away from the main pulse in ±1 ps are cleaned with a contrast improvement of about 10 7 , which verifies the pulse cleaning ability of the SD process.

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“…The SD process is a degenerated cascaded four-wave mixing (DCFWM) process [21][22][23] . It acts as a temporal gating to improve the temporal contrast of a laser pulse.…”

Section: Principle and Experimental Setupmentioning

confidence: 99%

“…These pulse cleaning techniques include saturable absorbers [15] , optical parametric amplification [3,16] , polarization rotation [13,17] , and crosspolarized wave (XPW) generation [18][19][20] . Pulse cleaning by using a self-diffraction (SD) process in a bulk Kerr medium was proposed recently [21,22] .…”

Section: Introductionmentioning

confidence: 99%

Linear angular dispersion compensation of cleaned self-diffraction light with a single prism

Shen

Wang

Liu

et al. 2018

High Pow Laser Sci Eng

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“…Here, we consider how an appropriate reference pulse can be obtained. XPW, SD, and TG are all frequency-conserved four-wave-mixing processes that are used to improve the temporal contrast of ultrahigh-peak-power femtosecond laser systems [51,55,56]. The performances of the generated XPW wave, SD signal, and TG signal show that these processes satisfy the requirement as a reference pulse for the SRSI method.…”

Section: Reference Pulsementioning

confidence: 99%

Self-Referenced Spectral Interferometry for Femtosecond Pulse Characterization

et al. 2017

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Abstract:Since its introduction in 2010, self-referenced spectral interferometry (SRSI) has turned out to be an analytical, sensitive, accurate, and fast method for characterizing the temporal profile of femtosecond pulses. We review the underlying principle and the recent progress in the field of SRSI. We present our experimental work on this method, including the development of self-diffraction (SD) effect-based SRSI (SD-SRSI) and transient-grating (TG) effect-based SRSI (TG-SRSI). Three experiments based on TG-SRSI were performed: (1) We built a simple TG-SRSI device and used it to characterize a sub-10 fs pulse with a center wavelength of 1.8 µm. (2) On the basis of the TG effect, we successfully combined SRSI and frequency-resolved optical gating (FROG) into a single device. The device has a broad range of application, because it has the advantages of both SRSI and FROG methods. (3) Weak sub-nanojoule pulses from an oscillator were successfully characterized using the TG-SRSI device, the optical setup of which is smaller than the palm of a hand, making it convenient for use in many applications, including sensor monitoring the pulse profile of laser systems. In addition, the SRSI method was extended for single-shot characterization of the temporal contrast of ultraintense and ultrashort laser pulses.

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“…Improvement of the temporal contrast is generally limited by the extinction ratio of polarizers for polarization rotation and XPW generation. Applying the self-diffraction (SD) process to clean ultrashort laser pulses temporally is a recently developed effective way to temporal contrast enhancement [19] . Temporal contrast can be improved by large orders of magnitude with the method since the self-diffraction process is a high-order nonlinear process and the generated SD pulses are spatially separated from incident pulses, avoiding usage of polarization discrimination device.…”

Section: Introductionmentioning

confidence: 99%

Temporal pulse cleaning by a self-diffraction process for ultrashort laser pulses

et al. 2014

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Applying the self-diffraction process to clean ultrashort laser pulses temporally is a recently developed effective way to temporal contrast enhancement. In this paper, we attempt to clean ultrashort laser pulses temporally by the self-diffraction process. Experiments were carried out to study the temporal contrast improvement in the front-end system of an ultraintense and ultrashort laser facility, i.e. the super intense laser for experiment on the extremes (SILEX-I). The results show that the maximum conversion efficiency of the first-order self-diffraction (SD1) pulse is 11%. The temporal contrast of the SD1 signal is improved by two orders of magnitude, i.e. to 10 3 , for a 2.4-ns prepulse with initial contrast of ~10. For a 5.5 -ns prepulse with initial contrast of 2×10 3 , the temporal contrast of the SD1 signal is improved by more than three orders of magnitude.

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Temporal contrast enhancement of femtosecond pulses by a self-diffraction process in a bulk Kerr medium

Cited by 60 publications

References 33 publications

Linear angular dispersion compensation of cleaned self-diffraction light with a single prism

Linear angular dispersion compensation of cleaned self-diffraction light with a single prism

Self-Referenced Spectral Interferometry for Femtosecond Pulse Characterization

Temporal pulse cleaning by a self-diffraction process for ultrashort laser pulses

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