$Theoretical Analysis on scanning spectral filter based on the bi-refraction electro-optical interferometer for pulse contrast improvement in femtosecond laser$

Theoretical Analysis on scanning spectral filter based on the bi-refraction electro-optical interferometer for pulse contrast improvement in femtosecond laser

A spectral scanning filter method to improve the pulse contrast in the femtosecond chains is proposed, which is made using of the character that the instantaneous frequency varies with the time approximately linearly for the chirped pulse in the time-frequency domain. A spectral scanning filter base...

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Veröffentlicht in:	Optics communications 2012-06, Vol.285 (12), p.2883-2888
Hauptverfasser:	Ma, Zairu, Sui, Zhan, Feng, Guoying, Sun, Nianchun, Wang, Yishan, Zhang, Bin, Chen, Jianguo
Format:	Artikel
Sprache:	eng
Schlagworte:	Femtosecond Fourier transformation Interferometers Lasers Near fields Scanning Spectra Spectral scanning filter Temporal logic Ultrafast optics Wavelength filtering devices
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container_end_page	2888
container_issue	12
container_start_page	2883
container_title	Optics communications
container_volume	285
creator	Ma, Zairu Sui, Zhan Feng, Guoying Sun, Nianchun Wang, Yishan Zhang, Bin Chen, Jianguo
description	A spectral scanning filter method to improve the pulse contrast in the femtosecond chains is proposed, which is made using of the character that the instantaneous frequency varies with the time approximately linearly for the chirped pulse in the time-frequency domain. A spectral scanning filter based on the bi-refraction electro-optical interferometer is proposed and analyzed. The spectral scanning filter for reducing the ASE intensity is analyzed in the time–frequency domain by using the Short-Time Fourier Transformation method. The results show that the pulse contrast can be improved by two orders, and the transmission efficiency of the chirped pulse can exceed 85% when the synchronizing time jitter ranges from −50ps to 50ps adopting the cascaded filter method. The great advantage of this novel nonlinear spectral filter technology fits the high energy and high peak intensity femtosecond chains for it filters the ASE in the near field in temporal domain.
doi_str_mv	10.1016/j.optcom.2012.02.018
format	Article
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A spectral scanning filter based on the bi-refraction electro-optical interferometer is proposed and analyzed. The spectral scanning filter for reducing the ASE intensity is analyzed in the time–frequency domain by using the Short-Time Fourier Transformation method. The results show that the pulse contrast can be improved by two orders, and the transmission efficiency of the chirped pulse can exceed 85% when the synchronizing time jitter ranges from −50ps to 50ps adopting the cascaded filter method. The great advantage of this novel nonlinear spectral filter technology fits the high energy and high peak intensity femtosecond chains for it filters the ASE in the near field in temporal domain.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.optcom.2012.02.018</doi><tpages>6</tpages></addata></record>
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source	Elsevier ScienceDirect Journals
subjects	Femtosecond Fourier transformation Interferometers Lasers Near fields Scanning Spectra Spectral scanning filter Temporal logic Ultrafast optics Wavelength filtering devices
title	Theoretical Analysis on scanning spectral filter based on the bi-refraction electro-optical interferometer for pulse contrast improvement in femtosecond laser
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