Photonic crystal fiber based multi wavelength Brillouin fiber laser with dual pa

A simple technique for achieving a stable, room temperature and multi-wavelength lasing with narrow linewidth is demonstrated using Brillouin fiber laser (BFL) with a 100-m-long photonic crystal fiber (PCF) in conjunction with a dual-pass configuration. A broadband fiber Bragg grating (FBG) operating in the C-band region is incorporated at the end side of the setup to allow a dual–pass operation. The proposed BFL can operate at any wavelength depending on the Brillouin pump wavelength and the FB