Subpicosecond pulse generation of KrF amplifier using acridine saturable absorber

Ken-ichi Ueda; Hajime Nishioka; Hideaki Kuranishi; Hiroshi Takuma

doi:10.1117/12.18476

1 June 1990 Subpicosecond pulse generation of KrF amplifier using acridine saturable absorber

Ken-ichi Ueda, Hajime Nishioka, Hideaki Kuranishi, Hiroshi Takuma

Proceedings Volume 1225, High-Power Gas Lasers; (1990) https://doi.org/10.1117/12.18476
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

A derivative of the linear tri-cyclic aromatic dye, acridine, was applied to the saturable absorber for KrF lasers. Acridine in ethanol showed the best bleaching properties such as the high cross section ratio Γ =7.1 and the low saturation fluence of 1.1 mJ/cm² due to the large absorption cross section of 5.6 x 10¹⁶ cm² at 248 nm. Absorption recovery had two time constants of 0.4 ns and 115 ns. Effective filtering of ASE made it possible to control the prepulse during the ultra short pulse amplification. Picosecond pulses with sharp front edge were compressed 10 ps to 420 fs in the saturated gain KrF amplifier. Sub-picosecond pulses with high contrast ratio to ASE were generated in the high gain operation of KrF lasers.

Citation Download Citation

Ken-ichi Ueda, Hajime Nishioka, Hideaki Kuranishi, and Hiroshi Takuma "Subpicosecond pulse generation of KrF amplifier using acridine saturable absorber", Proc. SPIE 1225, High-Power Gas Lasers, (1 June 1990); https://doi.org/10.1117/12.18476

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