Affiliation:
1. University of Chinese Academy of Sciences
Abstract
Spectral compression by passive phase demodulation provides an
effective way to obtain a high-power single-frequency second harmonic
(SH) laser. In this method, a single-frequency laser is broadened by
(0, π) binary phase modulation for
stimulated Brillouin scattering suppression in a high-power fiber
amplifier and compressed to single frequency after frequency doubling.
The effectiveness of compressing is determined by the properties of
the phase modulation system, including the modulation depth, frequency
response of modulation system, and modulation signal noise. A
numerical model is developed to simulate the influence of these
factors on the SH spectrum. The simulation results reproduce the
experimental observation well, including the reduction of the
compression rate at higher-frequency phase modulation, emergence of
spectral sidebands and pedestal.
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering