title: Tunable microwave generation based on a dual-wavelength single-longitudinal-mode fiber laser using a phase-shifted grating on a triangular cantilever.
abstract: Frequency tunable microwave signal generation, based on a dual-wavelength single-longitudinal-mode (SLM) erbium-doped fiber (EDF) laser, incorporating a phase-shifted fiber Bragg grating (PS-FBG) with two π-phase shifts, is demonstrated. In the proposed configuration, the PS-FBG with two ultranarrow transmission bands is embedded in a triangular cantilever to serve as a wavelength spacing tunable filter with a fixed center wavelength by applying various strains on the cantilever. A section of unpumped EDF is employed as a saturable absorber to ensure SLM operation in each of the two lasing lines. By beating the two wavelengths at a photodiode, a tunable microwave signal ranging from 8.835 to 24.360 GHz is successfully achieved.
authors.affiliation: School of Electrical and Electronics Engineering, Nanyang Technological University, 637553, Singapore. jiangmeng@ntu.edu.sg
authors.forename: Meng
authors.initials: M
authors.lastname: Jiang
authors.forename: Bo
authors.initials: B
authors.lastname: Lin
authors.forename: Perry Ping
authors.initials: PP
authors.lastname: Shum
authors.forename: Swee Chuan
authors.initials: SC
authors.lastname: Tjin
authors.forename: Xinyong
authors.initials: X
authors.lastname: Dong
authors.forename: Qizhen
authors.initials: Q
authors.lastname: Sun