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Dual-wavelength erbium-doped fiber laser with a simple linear cavity and its application in microwave generation

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4 Author(s)
Yu Yao ; Dept. of Electr. Eng., Tsinghua Univ., Beijing, China ; Xiangfei Chen ; Yitang Dai ; Shizhong Xie

A single-longitudinal-mode (SLM) dual-wavelength erbium-doped fiber (EDF) laser based on a simple linear cavity is proposed and demonstrated. The SLM operation is achieved by incorporating a dual-phase-shift fiber grating with two ultranarrow transmission bands. Due to the gain grating produced by spatial hole-burning in the EDF, the proposed linear cavity supports dual-wavelength oscillation at room temperature with a wavelength interval of 27 pm. The laser output is heterodyned on a photodetector and the generated microwave signal has a linewidth <20 kHz without any feedback.

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 1 )