Lasing-wavelength switchable multiwavelength erbium-doped fiber laser based on a nonlinear optical loop mirror with a photonic crystal fiber

Switchable multiwavelength erbium-doped photonic crystal fiber ring laser based on a length of polarization-maintaining photonic crystal fiber

“…They were employed in wavelength-switchable fiber lasers by a length of highly nonlinear photonic crystal fiber(HNL-PCF) and a multimode fiber Bragg grating (MM-FBG) [10] , or a length of HNL-PCF and a sampled chirped fiber Bragg grating (SC-FBG) [11] , or a sampled high-birefringence fiber grating and a PCF loop mirror [12] , or a Raman pump source and a PM-PCF-based Sagnac filter [13] , or a PCF loop mirror and a chirped FBG [14] .…”