External Synchronization of 160-GHz Optical Beat Signal by Optical Phase-Locked Loop Technique |
| |
Authors: | Takasaka S Ozeki Y Namiki S Sakano M |
| |
Affiliation: | PRESTO, Japan Sci. & Technol. Agency, Saitama; |
| |
Abstract: | 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 |
| |
Keywords: | |
|
|