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Ultrahigh-speed phaselocked-loop-type clock recovery circuit using a travelling-wave laser diode amplifier as a 50 GHz phase detector

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4 Author(s)
S. Kawanishi ; Transmission Syst. Lab., NTT, Kanagawa, Japan ; H. Takara ; M. Saruwatari ; T. Kitoh

Successful operation of a phaselocked loop is demonstrated using a travelling-wave laser-diode amplifier as a 50 GHz phase detector. Optical gain modulation in the laser diode amplifier and an all-optical clock multiplication technique using a silica-based guided-wave optical circuit are used to achieve the extremely highspeed operation. Also discussed is the possibility of more than 100 GHz operation.

Published in:

Electronics Letters  (Volume:29 ,  Issue: 19 )