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A Novel Dual-Wavelength DFB Fiber Laser Based on Symmetrical FBG Structure

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1 Author(s)
Xueming Liu ; State Key Lab. of Transient Opt. & Technol., Chinese Acad. of Sci., Xi''an

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

Published in:

Photonics Technology Letters, IEEE  (Volume:19 ,  Issue: 9 )