Experimental demonstration on 400 nm-scale bandwidth optical parametric chirped-pulse amplification based on mixed cascaded crystals.

Authors :: Qiu L
Sun M
Xie X
Liang X
Tu X
Li X
Zhu P
Yi Y
Ding F
Yang Q
Haq RU
Guo A
Zhu H
Kang J
Zhu J
Source :: Optics express [Opt Express] 2024 Feb 26; Vol. 32 (5), pp. 7633-7639.
Publication Year :: 2024
Abstract: We present an optical parametric chirped-pulse amplification (OPCPA) based on mixed cascaded crystals, taking advantage of the unique parametric phase-matching of lithium triborate (LiB <subscript>3</subscript> O <subscript>5</subscript> , LBO) and yttrium calcium oxyborate ((YCa <subscript>4</subscript> O(BO <subscript>3</subscript> ) <subscript>3</subscript> , YCOB) crystals. The OPCPA properties of LBO at 880 nm and YCOB at 750 nm are studied respectively. After amplification by two LBO and two YCOB crystals, a total signal gain of 10 <superscript>8</superscript> and spectral bandwidth close to 400 nm is obtained. After accurate dispersion compensation with a grating-pair compressor and chirped mirror compensator, a pulse duration of 9.4 fs is obtained by a SHG-frequency-resolved optical grating (FROG). This approach will be of great significance in high energy amplifier for high peak power few-cycle laser sources.

Full Text Access

Tools