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Updated: Jun 22, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
High amplification and low noise achieved by a double-stage non-collinear Brillouin amplifier
Zhiwei Lu1, Wei Gao, Weiming He
1Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China. zw_lu@sohu.com
Abstract:
We report a double-stage non-collinear Brillouin amplifier structure with high amplification and low noise, achieving an energy amplification of 6 x 10(11) and a signal-to-noise ratio of 10(3) for an input signal of 5.5 x 10(-14)J in the regime above the pump's stimulated Brillouin scattering threshold. The signal of the first-stage amplifier is efficiently amplified and separated from the noise output. The saturation amplification with noise suppressing is implemented in the second stage. The design principles of system parameters such as the intersection angle between the pump and signal beams, the pump energy, and the beam diameter are given.
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