All-optical clock recovery from NRZ signal through preprocessing by single narrow-band filter

Yu Yu; Xinliang Zhang; Jing Hu; Dexiu Huang

doi:10.1117/12.746093

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19 November 2007 All-optical clock recovery from NRZ signal through preprocessing by single narrow-band filter

Yu Yu, Xinliang Zhang, Jing Hu, Dexiu Huang

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Proceedings Volume 6783, Optical Transmission, Switching, and Subsystems V; 67832H (2007) https://doi.org/10.1117/12.746093
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

We demonstrate a simple configuration for clock recovery from nonreturn-to-zero (NRZ) signal, which is preprocessed by a narrow-band filter. Clock component is enhanced evidently after the filter. Compared with previous preprocessing schemes, the single filter is simple and suitable for different bit-rates. The output performances related to the bandwidth and the detuning of the filter are analyzed. By cascading a clock recovery unit with semiconductor optical amplifier based fiber ring laser, clock signal can be extracted from the preprocessed signal with extinction ratio over 10 dB and root mean square timing jitter of 900 fs, at 10 to 40 Gb/s. By simply using a filter with larger bandwidth, much higher bit-rate operation can be achieved easily.

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Yu Yu, Xinliang Zhang, Jing Hu, and Dexiu Huang "All-optical clock recovery from NRZ signal through preprocessing by single narrow-band filter", Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 67832H (19 November 2007); https://doi.org/10.1117/12.746093

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