title: A tunable and switchable single-longitudinal-mode dual-wavelength fiber laser with a simple linear cavity.
abstract: A simple linear cavity erbium-doped fiber laser based on a Fabry-Perot filter which consists of a pair of fiber Bragg gratings is proposed for tunable and switchable single-longitudinal-mode dual-wavelength operation. The single-longitudinal-mode is obtained by the saturable absorption of an unpumed erbium-doped fiber together with a narrow-band fiber Bragg grating. Under the high pump power (>166 mW) condition, the stable dual-wavelength oscillation with uniform amplitude can be realized by carefully adjusting the polarization controller in the cavity. Wavelength selection and switching are achieved by tuning the narrow-band fiber Bragg grating in the system. The spacing of the dual-wavelength can be selected at 0.20 nm (approximately 25.62 GHz), 0.22 nm (approximately 28.19 GHz) and 0.54 nm (approximately 69.19 GHz).
authors.affiliation: Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Xiaoying
authors.initials: X
authors.lastname: He
authors.forename: Xia
authors.initials: X
authors.lastname: Fang
authors.forename: Changrui
authors.initials: C
authors.lastname: Liao
authors.forename: D N
authors.initials: DN
authors.lastname: Wang
authors.forename: Junqiang
authors.initials: J
authors.lastname: Sun
mesh_terms: D003195:Computer Communication Networks; D004867:Equipment Design; D004871:Erbium / Q000737:chemistry; D005336:Fiber Optic Technology; D007834:Lasers; D008872:Microwaves; D055095:Optics and Photonics; D009991:Oscillometry / Q000379:methods; D012815:Signal Processing, Computer-Assisted; D013696:Temperature; D014159:Transducers
chemical_list: D004871:Erbium