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Dual-Wavelength DFB Fiber Laser Based on Unequalized Phase Shifts

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5 Author(s)
Sun, Jie ; Dept. of Electron. Eng., Tsinghua Univ., Beijing ; Yitang Dai ; Yejin Zhang ; Xiangfei Chen
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A novel structure for dual-wavelength distributed feedback (DFB) fiber laser is proposed and experimentally demonstrated. This structure is based on a uniform fiber Bragg grating with two unequalized phase shifts, which markedly suppress the mode competition of the two lasing wavelengths; and then a 52-pm-spaced dual-wavelength DFB fiber laser operating at single-longitudinal-mode and single-polarization is achieved at room temperature. A simple method is also implemented to fabricate the phase shifts with high precision

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 23 )