title: Ultrafine optical-frequency tunable Brillouin fiber laser based on fiber strain.
abstract: We present an ultrafine tunable single-frequency Brillouin fiber laser in which the fiber Brillouin gain also acts as a high-precision tunable filter. Controlling the strain on the fiber, the Stokes frequency shift may be precisely changed, and thus the lasing frequency can be tuned. Assisted by the frequency pulling effect, this method provides continuous ultrafine tuning ability for ~30% of the free spectral range without mode hopping, and can cover 271 MHz. The experiments showed that the laser achieves tuning step of 60 kHz.
authors.affiliation: Department of Physics, Key Laboratory for Laser Plasmas (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Zhijing
authors.initials: Z
authors.lastname: Wu
authors.forename: Li
authors.initials: L
authors.lastname: Zhan
authors.forename: Qishun
authors.initials: Q
authors.lastname: Shen
authors.forename: Jinmei
authors.initials: J
authors.lastname: Liu
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu
authors.forename: Pingping
authors.initials: P
authors.lastname: Xiao