Open AccessPump RIN coupling to frequency noise of a polarization-maintaining 2 µm single frequency fiber laser
Author(s) -
Qian Zhang,
Yanbing Hou,
Weihua Song,
Xi Wang,
C. D. Blair,
Xu Chen,
Ju Li,
C. Zhao,
Pu Wang
Publication year - 2021
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.415298
Subject(s) - relative intensity noise , laser , noise (video) , coupling (piping) , optics , polarization (electrochemistry) , physics , materials science , semiconductor laser theory , chemistry , computer science , artificial intelligence , metallurgy , image (mathematics)
We investigated the frequency noise coupling mechanism of a 2 μm polarization-maintaining single frequency fiber laser (SFFL) theoretically and experimentally. The coupling of pump's relative intensity noise (RIN) to frequency noise of a single-frequency high-gain silica fiber laser is shown experimentally to be consistent with a theoretical model where thermal expansion and thermo-optic effect mediate the coupling. The measured and theoretical frequency noise of the 2 μm SFFL with three pump sources is compared. We find using a 1550 nm single frequency laser pump source produces the lowest frequency noise, less than 100 H z / H z at frequencies higher than 100 Hz.