ENHANCED S-BAND BRILLOUIN ERBIUM FIBER LASER WITH ADDITIONAL EDFA

Abstract

A short wavelength band Brillouin Erbium Fiber Laser (S-band BEFL) with enhanced characteristics using an additional erbium-doped fiber amplifier (EDFA) in the sub-loop of the BEFL system. Compared with the conventional BEFL without the additional EDFA, the enhanced BEFL has improved the number of channels as well as the flatness of the Brillouin Stokes’ peak power. By incorporating a double-pass EDFA, a stable output laser combs up to 8 channels was obtained at 1503 nm wavelength region, with peak power variation for the first three Stokes is reduced from 30.9 dB to 5.4 dB. The incorporation of additional EDFA also increases the tuning range of the BEFL with a maximum tuning range of 1.8 nm obtained with the single-pass scheme. The S-band BEFL has a constant spacing of 0.09 nm or 11 GHz, which has a potential application in dense wavelength division multiplexed systems.