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External Synchronization of 160-GHz Optical Beat Signal by Optical Phase-Locked Loop Technique

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4 Author(s)
Takasaka, S. ; PRESTO, Japan Sci. & Technol. Agency, Saitama ; Ozeki, Y. ; Namiki, S. ; Sakano, Misao

We have synchronized a 160-GHz optical beat signal with a 40-GHz reference optical pulse train by using an optical phase-locked loop (OPLL). The OPLL consists of an optical beat signal source, comprising a pair of three-electrode distributed feedback laser diodes that works as a voltage controlled oscillator, and an all-optical phase detector based on the two-photon absorption in a silicon avalanche photodiode. Phase-locking operation is confirmed through phase-error measurement and cross-correlation trace measurement. The residual timing jitter of the 160-GHz optical beat signal relative to the reference pulse train, in the bandwidth of 80 MHz, is measured to be as small as 126 fs

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 23 )