Wavelength switchable single-longitudinal-mode fiber laser with two 蟺 phase-shifted chirped fiber Bragg grating as a narrow linewidth filter

摘要

Abstract. A wavelength switchable single-longitudinal-mode erbium-ndoped fiber laser is experimentally demonstrated, in which a novel two u0001nphase-shifted chirped fiber Bragg grating serves as the dual-channelnnarrow-linewidth filter, and a switch module consisting of three bandpassnfilters and a variable optical attenuator is used to control the laser be-nhaviors of single- and dual-wavelength lasing. A stable dual-wavelengthnsingle-longitudinal-mode oscillation with 8-nm wavelength spacing isnalso realized and verified. The results provide a potential possibility tongenerate continuous terahertz waves optically. © 2010 Society of Photo-OpticalnInstrumentation Engineers. u0001DOI: 10.1117/1.3484947