Design And Fabrication Of A Composite Transmission Pulse Compression Grating

Keywords

Diffraction efficiency; Fused silica transmission grating; Laser damage threshold; Pulse compression grating

Abstract

A composite transmission pulse compression grating was proposed for femto-second Ti:sapphire lasers. The composite transmission grating with 700-900 nm bandwidth worked at a center wavelength of 800 nm was consisted of two gratings with groove densities 1 250 line/mm and 3 300 line/mm and they were integrated in a fused silica plate. The 1 250 line/mm grating was used for compressing laser pulse. The 3 300 line/mm anti-reflection grating was conductive to decreasing the reflection loss and avoiding the wave-front distortion by using a high frequency grating structure to replace the anti-reflection film on the surface of the fused silica plate. Completely being made of fused silica, the composite pulse compression grating has a high laser damage threshold. The composite transmission grating was designed based on the rigorous coupled wave theory. The optimization calculation results show that the -1st order diffraction efficiency of the 1 250 line/mm grating is up to 98% (@800 nm) and the transmission of the 3 300 lp/mm grating is up to 99.7% at 700-900 nm bandwidth. Finally, the composite transmission pulse compression grating(Φ65 mm×1 mm ) was fabricated by holographic recording and ion bean etching and its diffraction efficiency is coincident with that of the theoretical analysis.

Publication Date

12-1-2016

Publication Title

Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Volume

24

Issue

12

Number of Pages

2983-2987

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.3788/OPE.20162412.2983

Socpus ID

85011954097 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85011954097

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