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http://dx.doi.org/10.3807/KJOP.2005.16.1.021

Theoretical and experimental study on ultrahigh-speed clock recovery system with optical phase lock loop using TOAD  

Ki, Ho-Jin (Photonics Research Center, Korea Institute of Science and Technology)
Jhon, Young-Min (Photonics Research Center, Korea Institute of Science and Technology)
Byun, Young-Tae (Photonics Research Center, Korea Institute of Science and Technology)
Woo, Deok-Ha (Photonics Research Center, Korea Institute of Science and Technology)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.1, 2005 , pp. 21-26 More about this Journal
Abstract
10 GHz clock recovery from 40 Gbit/s optical time-division-multiplexed(OTDM) signal pulses was experimentally demonstrated using an optical phase lock loop based on a terahertz optical asymmetric demultiplexer(TOAD) with a local-reference-oscillator-free electronic feedback circuit. The 10 GHz clock was successfully extracted from 40 Gbit/s signals. The SNR of the time-extracted 10 GHz RF signal to the side components was larger than 40 dB. Also we performed numerical simulation about the extraction process of phase information in TOAD. The lock-in frequency range of the clock recovery is found to be 10 kHz.
Keywords
OTDM; TOAD; PLL; Clock Recovery;
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