Title :
A Novel Dual-Wavelength DFB Fiber Laser Based on Symmetrical FBG Structure
Author_Institution :
State Key Lab. of Transient Opt. & Technol., Chinese Acad. of Sci., Xi´´an
fDate :
5/1/2007 12:00:00 AM
Abstract :
A novel grating structure is proposed and demonstrated to obtain stable dual-wavelength (DW) distributed-feedback (DFB) fiber lasers at room temperature. The proposed grating is based on a symmetrical structure, where one half is periodically sampled by "0"-to-"pi" period and the other half is done by "pi"-to-"0" period. This structure can create two separated resonance cavities and hence achieve the stable DW lasing operation. By fabricating the proposed grating on a piece of Er : Yb-codoped fiber, we experimentally obtain a stable DW-DFB fiber laser with wavelength spacing of ~440 pm at room temperature
Keywords :
Bragg gratings; distributed feedback lasers; erbium; fibre lasers; laser cavity resonators; laser stability; optical fibres; ytterbium; 293 to 298 K; Er:Yb-codoped fiber; distributed feedback laser; dual-wavelength laser; fiber laser; resonance cavities; room temperature operation; stable lasing operation; symmetrical fiber Bragg grating; Bragg gratings; Erbium; Erbium-doped fiber lasers; Fiber gratings; Fiber lasers; Laser noise; Laser stability; Resonance; Sampling methods; Temperature; Distributed-feedback (DFB); fiber Bragg grating (FBG); fiber laser;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.894940
