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Waveband-switchable SOA ring laser constructed with a phase modulator loop mirror filter

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3 Author(s)
Fok, M.P. ; Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, China ; Lee, K.L. ; Shu, C.

An electrically tunable multiwavelength source has been developed using a birefringence-based optical comb filter in a semiconductor optical amplifier ring laser. The filter is constructed with an electrooptic phase modulator placed inside a fiber loop mirror. By controlling the birefringence of the modulator through the applied bias, the radio-frequency power, or the modulation frequency, we achieve a continuous shift of the spectral comb to access different interleaved wavebands. Electrical waveband switching has been successfully demonstrated for 21 wavelengths at 100-GHz grid spacing with an optical signal-to-noise ratio over 40 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 7 )