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Dual-wavelength single-longitudinal-mode erbium-doped fibre laser based on fibre bragg grating pair and its application in microwave signal generation

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5 Author(s)
D. Chen ; Zhejiang Univ., Hangzhou ; H. Fu ; W. Liu ; Y. Wei
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A simple dual-wavelength single-longitudinal-mode erbium-doped fibre laser is proposed by incorporating a fibre Bragg grating pair, which is used as a Fabry-Perot filter with two ultra-narrow (~0.12 pm) transmission bands. Stable dual-wavelength single-longitudinal-mode lasing with a wavelength spacing of ~0.08 nm is achieved at room temperature. By beating the dual-wavelengths at a photodetector, a microwave signal at 9.616 GHz is demonstrated with a frequency stability better than 1 MHz and a spectral width less that 10 kHz.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 7 )