Single Longitudinal Mode Brillouin Fiber Laser With Cascaded Ring Fabry–Pérot Resonator

Author

Yi Liu ; Jin-Long Yu ; Wen-Rui Wang ; Hong-Gang Pan ; En-Ze Yang

Author_Institution

Lab. of Fiber-Opt. Commun., Tianjin Univ., Tianjin, China

Volume

26

Issue

2

fYear

2014

fDate

Jan.15, 2014

Firstpage

169

Lastpage

172

Abstract

A novel single longitudinal mode (SLM) Brillouin fiber laser (BFL) with cascaded ring (CR) Fabry-Pérot resonator is proposed and demonstrated. By optimizing the CR length of the single mode fiber cavity at 100 m (or 50 m) and 10 m, stable SLM operation is obtained. Therefore, the threshold power is lower and linewidth is narrower than that of previously reported BFL with 10 m (or 20 m) single cavity. Additionally, there is no additional attenuation except intrinsic loss of optical devices. The measured linewidth with 60 dB (or 45 dB) improved value of side mode suppression ratio is 0.41 kHz (or 3.23 kHz), which is three (or two) orders of magnitude than that of the pump. Using a stabilizing feedback loop based on autotracking technique with polarization maintaining fiber-based optical delay line, the SLM BFL exhibits good performance with 6% power fluctuation in 1 h.

Keywords

Fabry-Perot resonators; fibre lasers; laser beams; laser cavity resonators; laser modes; optical fibre polarisation; optical losses; optical pumping; stimulated Brillouin scattering; CR length; SLM BFL; autotracking technique; cascaded ring Fabry-Perot resonator; fiber-based optical delay line; frequency 0.41 kHz; intrinsic loss; optical devices; optical pump; polarization; side mode suppression; single longitudinal mode Brillouin fiber laser; single mode fiber cavity; size 10 m; size 100 m; stabilizing feedback loop; stable SLM operation; threshold power; time 1 hr; Cavity resonators; Laser excitation; Optical fiber amplifiers; Optical fiber polarization; Pump lasers; Ring lasers; Scattering; Brillouin fiber laser (BFL); Cascaded ring Fabry–Pérot resonator; narrow linewidth; single longitudinal mode (SLM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2290191

Filename

6663626