title: Tunable multiwavelength generation based on Brillouin-erbium comb fiber laser assisted by multiple four-wave mixing processes.
abstract: A tunable multiwavelength Brillouin-erbium comb fiber laser with ultra-narrow wavelength spacing and a large wavelength number, employing a 135-m highly nonlinear fiber, has been experimentally demonstrated. The simultaneous presence of Brillouin pump and Stokes lines within the ring cavity initiate higher-order Stokes and anti-Stokes lines via multiple four-wave mixing processes. The experiment demonstrates that this is an effective solution of increasing the number of lasing lines. Up to 150 lasing lines in single-longitudinal-mode operation with a rigid wavelength spacing of 0.075 nm have been achieved at 1480 nm pump powers of 165 mW and Brillouin pump power of 12.0 dBm. The multiwavelength source exhibits a good stability on both the operating wavelengths and the output powers, and a 6-nm tuning range from 1562 nm to 1568 nm is obtained.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
authors.forename: Jianguan
authors.initials: J
authors.lastname: Tang
authors.forename: Junqiang
authors.initials: J
authors.lastname: Sun
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.forename: Tianye
authors.initials: T
authors.lastname: Huang
authors.forename: Yujie
authors.initials: Y
authors.lastname: Zhou