130-W picosecond green laser based on a frequency-doubled hybrid cryogenic Yb:YAG amplifier

被引：37

作者：

Hong, Kyung-Han ^{[1
]}

Lai, Chien-Jen

Siddiqui, Aleem

Kaertner, Franz X.

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 19期

关键词：

MHZ REPETITION-RATE; SOLID-STATE LASERS; TI-SAPPHIRE LASER; 2ND-HARMONIC GENERATION; AMPLIFICATION; PULSES;

D O I：

10.1364/OE.17.016911

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

130-W average-power picosecond green laser pulses at 514.5 nm are generated from a frequency-doubled hybrid cryogenic Yb:YAG laser. A second-harmonic conversion efficiency of 54% is achieved with a 15-mm-long noncritically phase-matched lithium triborate (LBO) crystal from a 240-W 8-ps 78-MHz pulse train at 1029 nm. The high-average-power hybrid laser system consists of a picosecond fiber chirped-pulse amplification seed source and a cryogenically-cooled double-pass Yb:YAG amplifier. The M-2 value of 2.7, measured at 77 W of second-harmonic power, demonstrates a good focusing quality. A thermal analysis shows that the longitudinal temperature gradient can be the main limiting factor in the second-harmonic efficiency. To our best knowledge, this is the highest-average-power green laser source generating picosecond pulses. (C) 2009 Optical Society of America

引用

页码：16911 / 16919

页数：9

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