Open AccessDual-frequency pulse laser based on acousto-optic modulation
Author(s) -
Yuhe Wang,
Yudong Lian,
Han Song,
Yang Yu,
Qi Xuan,
Zhenxu Bai,
Yulei Wang,
Zhiwei Lü
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.439591
Subject(s) - optics , brillouin scattering , laser , energy conversion efficiency , materials science , extinction ratio , pulse width modulation , frequency modulation , physics , optoelectronics , power (physics) , bandwidth (computing) , wavelength , telecommunications , quantum mechanics , computer science
Non-collinear stimulated Brillouin scattering (SBS) amplification can obtain high peak power Stokes output while ensuring the stability, but the frequency mismatch reduces the energy conversion efficiency of the system. In this paper, a dual-frequency pulse laser based on acousto-optic crystal modulation is designed. The output pulse pair can be used as pump and Stokes light, respectively, which realizes the active frequency matching of the gain medium Brillouin frequency shift during the SBS amplification process and helps to maintain ideal energy conversion efficiency. The dual-frequency laser finally produced a laser pulse pair with a pulse width adjustment range of 100 ps-50 ns, a frequency shift range of 0 GHz-2 GHz, and the polarization extinction ratio (PER) reaches 20.82dB.