Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 20, Issue 13-16, Pages 1148-1150Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2008.925186
Keywords
active mode locking; clock recovery; dispersion-compensating fiber; semiconductor optical amplifiers (SOAs)
Funding
- Research Attachment Program of the Hong Kong Polytechnic University
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An all-optical clock recovery device capable of continuously recovering the clock frequency of optical return-to-zero signals from a 10- to 12.5-GHz repetition rate is reported. The recovered clock consists of chirp-free Gaussian pulses at a diffraction limit with low timing jitter of similar to 200 fs. We employ intracavity dispersion-compensating fiber (DCF) in order to eliminate chirp and asymmetry of semiconductor optical amplifier (SOA)-amplified pulses. This SOA+DCF ring configuration allows us to easily recover the clock over a 40-nm tuning range corresponding to the SOA gain bandwidth.
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