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Four-channel frequency locking using back-reflection dips of a fibre-fed Fabry-Perot filter

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2 Author(s)
Lyu, G.Y. ; Sect. of Opt. Coherent Commun., Electron. & Telecommun. Res. Inst., Taejon, South Korea ; Park, C.-S.

A 4-channel frequency locking system has been demonstrated using a fibre-fed Fabry-Perot (FFP) filter with a free spectral range (FSR) of 100 GHz. A back-reflection curve from the FFP was used for the extraction of an error signal in such a way as to overcome the limitation in the number of accommodatable channels due to the saturation in a photodetector. The frequency stability and locking range of each channel were within 15 MHz and over 12 GHz, respectively

Published in:

Electronics Letters  (Volume:31 ,  Issue: 2 )