Open AccessCharacteristics and improvement of wideband wavelength-tunable narrow-linewidth source by spectral compression in quasi-dispersion-increasing comb-profile fiber
Author(s) -
Norihiko Nishizawa,
Yoshimichi Andou,
Emiko Omoda,
Hiromichi Kataura,
Youichi Sakakibara
Publication year - 2016
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.24.023403
Subject(s) - laser linewidth , materials science , optics , dispersion (optics) , fiber laser , wavelength , comb filter , frequency comb , pulse compression , dispersion shifted fiber , zero dispersion wavelength , spectral width , wideband , fiber , laser , optoelectronics , fiber optic sensor , bandwidth (computing) , physics , telecommunications , radar , computer science , composite material
We investigated the characteristics and behavior of spectral compression in a quasi-dispersion-increasing comb-profile fiber (CPF). A periodical breathing behavior and sidelobe emission process in the CPF were observed in numerical analysis. Then, taking account of the numerical results, we developed an improved CPF in which the sidelobe suppression was dramatically improved to -24.2 dB while keeping a narrow spectral width of ~0.6 nm. As a seed pulse source, we developed a high-repetition-rate Er-doped ultrashort-pulse fiber laser with single-wall carbon nanotubes and used the improved CPF to realize a high-power, narrow-linewidth source with wide wavelength tunability in the 1.62-1.90 μm band.