Tunable microwave generation based on a dual-wavelength single-longitudinal-mode fiber laser using a phase-shifted grating on a triangular cantilever

Meng Jiang; Bo Lin; Perry Ping Shum; Swee Chuan Tjin; Xinyong Dong; Qizhen Sun

doi:10.1364/AO.50.001900

Tunable microwave generation based on a dual-wavelength single-longitudinal-mode fiber laser using a phase-shifted grating on a triangular cantilever

Appl Opt. 2011 May 1;50(13):1900-4. doi: 10.1364/AO.50.001900.

Authors

Meng Jiang¹, Bo Lin, Perry Ping Shum, Swee Chuan Tjin, Xinyong Dong, Qizhen Sun

Affiliation

¹ School of Electrical and Electronics Engineering, Nanyang Technological University, 637553, Singapore. jiangmeng@ntu.edu.sg

PMID: 21532672
DOI: 10.1364/AO.50.001900

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.