Open AccessOptomechanical engineering of quasi-continuous-wave background in mode-locked fiber laser
Author(s) -
Ki Sang Lee,
Dae Seok Han,
Chang Kyun Ha,
Kyoung Jun Moon,
Myeong Soo Kang
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.419460
Subject(s) - optics , brillouin scattering , fiber laser , laser , fiber , optical fiber , materials science , mode locking , mode volume , cladding (metalworking) , pulse (music) , physics , polarization maintaining optical fiber , fiber optic sensor , detector , metallurgy , composite material
Noise-like quasi-continuous-wave background (qCWB) in a mode-locked fiber laser mediates various multi-pulse dynamics via long-range inter-pulse interactions. This raises a possibility to control multi-pulse phenomena through manipulation of the qCWB, while it has been rarely studied yet. Here, we investigate the qCWB engineering by imposing optomechanically induced impulsive intensity modulations on the qCWB. The mode-locked pulses excite electrostrictively several transverse acoustic resonance modes inside the fiber cavity, which eventually leads to the formation of sharp qCWB modulations regularly spaced in the time domain. In particular, we experimentally demonstrate that the characteristics of the optomechanical qCWB modulations can be adjusted by controlling the in-fiber optomechanical interactions via changing the structure of the fiber core, cladding, and coating. Our observations are supported by directly measured forward stimulated Brillouin scattering spectra of the intracavity fibers.