Open AccessIncreasing the SBS threshold by applying a flexible temperature modulation technique with temperature measurement of the fiber core
Author(s) -
Zhaokai Lou,
Kai Han,
Xiaolin Wang,
Hanwei Zhang,
Xiaojun Xu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.389333
Subject(s) - brillouin scattering , optics , materials science , reflectometry , modulation (music) , core (optical fiber) , temperature measurement , optical fiber , frequency modulation , power (physics) , laser , fiber laser , fiber , time domain , physics , acoustics , telecommunications , radio frequency , computer science , quantum mechanics , composite material , computer vision
In this paper, we proposed a temperature modulation technique for the suppression of stimulated Brillouin scattering (SBS). This technique can achieve different kinds of temperature distributions in a high-power laser system with compact design and safe operation. We built up an experiment platform and a theoretical model to evaluate the performance of the temperature modulation technique by applying different temperature distributions along the gain fiber. A total of 3.3 dB SBS suppression can be achieved with only a 70 °C temperature gradient at 36 W output power in this experiment. During the experiment, optical frequency domain reflectometry (OFDR) was used to measure the temperature distributions of the gain fiber core under the effect of the temperature modulation technique. By further simulating and optimizing the temperature distributions, we can see the potential of SBS suppression rise to 3.5 dB with this temperature modulation technique. Through these studies, we demonstrated our temperature modulation technique with high flexibility and great potential for SBS suppression in a high-power single-frequency laser system.