Open AccessSub-nanosecond stimulated Brillouin scattering pulse compression using HT270 for kHz repetition rate operation
Author(s) -
Hongli Wang,
Seongwoo Cha,
Hong Kong,
Yulei Wang,
Zhiwei Lü
Publication year - 2019
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.27.029789
Subject(s) - brillouin scattering , optics , materials science , nanosecond , amplifier , thermal , pulse compression , pulse (music) , laser , optoelectronics , physics , telecommunications , radar , cmos , detector , meteorology , computer science
With mitigation of thermal effects in a generator cell based on a rotating off-centered lens, the effects of thermal blooming, self-defocusing, and thermal convection in the amplifier cell have experimentally proven to be the main factors limiting high-repetition-rate stimulated Brillouin scattering (SBS) pulse compression. To alleviate these effects, Galden HT270, which has a large viscosity coefficient, is used and compared experimentally. The operating repetition rate using HT270 was improved from 200 Hz to 1,000 Hz, comparable to the values in the literature. With a pump energy of 50 mJ at 1,000 Hz, the pump pulse was compressed down to 820 ps using HT270 with an energy efficiency of 52.2%. If the injection energy is further increased, the SBS energy efficiency can be increased beyond this value.