Broadband and high efficiency metal multi-layer dielectric grating based on non-quarter-wave coatings as a reflective mirror

This article deals with designing a broadband and high efficiency metal multi-layer dielectric grating （MMDG） used to compress and stretch an ultrashort laser pulse. The diffraction characteristics of the IVIMDG are analysed by using the rigorous coupled-wave method. The multi-layer dielectric used...

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Bibliographic Details
Published inChinese physics B Vol. 21; no. 9; pp. 353 - 358
Main Author 张文飞 孔伟金 云茂金 刘均海 孙欣
Format Journal Article
LanguageEnglish
Published 01.09.2012
Subjects
Broadband
Coatings
Dielectrics
Diffraction
Diffraction efficiency
Grooves
Lasers
Multilayers
Wavelengths
介质光栅
反射镜
啁啾脉冲放大
波长
涂层
超宽带
超短激光脉冲
金属
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/21/9/094218

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Summary:This article deals with designing a broadband and high efficiency metal multi-layer dielectric grating （MMDG） used to compress and stretch an ultrashort laser pulse. The diffraction characteristics of the IVIMDG are analysed by using the rigorous coupled-wave method. The multi-layer dielectric used as the reflective mirror is made up of non- quarter-wave coatings. Taking the diffraction efficiency of the -1 order as the value of merit function, the parameters such as groove depth, residual thickness, duty cycle, and reflective mirror are optimized to obtain broadband and high diffraction efficiency. The optimized MMDG shows an ultra-broadband working spectrum with the average efficiency exceeding 97% over 160 nm wavelength centred at 1053 nm and TE polarization. The optimized MMDG should be useful for chirped pulse amplification.
Bibliography:grating, broadband, non-quarter-wave coatings
Zhang Wen-Fei, Kong Wei-Jin, Yun Mao-Jin, Liu Jun-Hai, and Sun Xin a） College of Physics Science, Qingdao University, Qingdao 266071, China b） Key Laboratory of Photonics Materials and Technology in Universities of Shandong （Qingdao University）, Qingdao 266071, China
This article deals with designing a broadband and high efficiency metal multi-layer dielectric grating （MMDG） used to compress and stretch an ultrashort laser pulse. The diffraction characteristics of the IVIMDG are analysed by using the rigorous coupled-wave method. The multi-layer dielectric used as the reflective mirror is made up of non- quarter-wave coatings. Taking the diffraction efficiency of the -1 order as the value of merit function, the parameters such as groove depth, residual thickness, duty cycle, and reflective mirror are optimized to obtain broadband and high diffraction efficiency. The optimized MMDG shows an ultra-broadband working spectrum with the average efficiency exceeding 97% over 160 nm wavelength centred at 1053 nm and TE polarization. The optimized MMDG should be useful for chirped pulse amplification.
11-5639/O4
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SourceType-Scholarly Journals-1
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/9/094218