Low-noise, single-frequency, single-polarization Brillouin/erbium fiber laser.
We demonstrate a low-noise Brillouin/erbium fiber laser (BEFL), which uses only 1.5 m polarization-maintaining erbium-doped fiber as both the Brillouin and erbium gain media. This BEFL presents a phase noise of -125 dB/Hz(1/2) at 1 kHz frequency, at 2 mW Brillouin pump (~3 MHz linewidth) power and 200 mW 980 nm pump power. The polarization extinction ratio of the laser output light is 31 dB. Stable (~2 h) single-mode operation is observed. This BEFL presents potential applications in distributed Brillouin fiber sensors, inteferometric fiber sensors, and optical communications.
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China.
Mo
M
Chen
Zhou
Z
Meng
Xiaobo
X
Tu
Huijuan
H
Zhou