Author
Xia Li
Bio: Xia Li is an academic researcher from Nanyang Technological University. The author has contributed to research in topics: Optical amplifier & Signal. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.
Topics: Optical amplifier, Signal, Jitter, Clock signal, Demodulation
Papers
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TL;DR: In this article, the chromatic dispersion induced clock tone was introduced into a free-running SOA-based fiber ring laser for achieving mode-locking, and a linearly chirped fiber Bragg grating was used to regenerate the clock tone of the NRZ-DPSK signal.
5 citations
Cited by
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TL;DR: In this paper, an all-optical clock recovery from 20Gbit/s non-return-to-zero differential phase-shift-keying (NRZ-DPSK) signals is demonstrated experimentally by using a polarization-maintaining fiber loop mirror filter (PMF-LMF) and a semiconductor optical amplifier (SOA) fiber ring laser.
8 citations
02 Nov 2009
TL;DR: In this paper, a self-nonlinear polarization switching (SNPS) was employed to achieve amplitude equalization of the recovered clock pulses, and stable and low jitter 35.80 GHz optical clock pulses were directly extracted out from input NRZ data.
Abstract: We experimentally demonstrate all-optical clock recovery (CR) from the nonreturn-to-zero (NRZ) data without any preprocess measure. Multi-quantum-well (MQW) Fabry-Perot semiconductor optical amplifier (FP-SOA) plays the dual role of the data format converter and the clock recovery device. To achieve amplitude equalization of the recovered clock pulses, a self-nonlinear polarization switching (SNPS) including the FP-SOA itself, two polarization controllers (PCs) and a polarization beam splitter (PBS) is employed. Using the presented scheme, stable and low jitter 35.80 GHz optical clock pulses were directly extracted out from input NRZ data. This scheme has some distinct advantages such as being transparent to data format, free preprocess, free pre-amplification, convenient tuning, good tolerance to long “0s” data, and good tolerance to wavelength drifting of input data.
3 citations
TL;DR: In this article, the authors demonstrated all-optical clock extraction from a 10Gbit/s NRZ-DPSK input signal using modal interference in a two-mode fiber (TMF) and a mode-locked fiber ring laser.
2 citations
TL;DR: In this paper, a multi-wavelength clock recovery (CR) scheme was proposed to perform all-optical parallel processing, which has potential application in optical communication systems that use WDM technology.
Abstract: Multiwavelength clock recovery (CR) is desired to perform all-optical parallel processing, which has potential application in optical communication systems that use WDM technology. Fabry–Perot semiconductor optical amplifier (FP–SOA) can perform the similar filter function as passive FP filter, and can simultaneously provide gain for oscillation pulses in the cavity; it is essentially an active filter. We experimentally demonstrated simultaneous multiwavelength all-optical CR from input 36.47-Gb/s pseudo-return-zero (PRZ) data and non-return-zero (NRZ) data using a single multi-quantum-well (MQW) FP-SOA with facets reflectivity of 30%. The presented multiwavelength CR scheme is also suitable for PSK signals. Dual-channel CR from input two channels 36.47-Gb/s 2 23 −1 NRZ-DPSK data located at different wavelength is experimentally demonstrated. This scheme is transparent for data formats, which is very important for next generation optical networks.
1 citations
TL;DR: In this article, all-optical clock recovery from 20Gbit/s non-return-to-zero differential phase-shift-keying (NRZ-DPSK) signal is demonstrated experimentally by using Polarization-Maintaining Fiber Loop Mirror Filter and semiconductor optical amplifier (SOA) fiber ring laser.
Abstract: All-optical clock recovery (CR) from 20-Gbit/s nonreturn-to-zero differential phase-shift-keying (NRZ-DPSK) signal is demonstrated experimentally by using Polarization-Maintaining Fiber Loop Mirror Filter and semiconductor optical amplifier (SOA) fiber ring laser. Only by adjusting polarization controller (PC), NRZ-DPSK signal were conveniently and fast converted to pseudo return-to-zero (PRZ) signal via PMF-LMF. Then the PRZ signal is injected into the SOA fiber laser for CR. The recovered clock signals with the extinction ratio of 10 dB and the root-mean-square timing jitter of 850 fs is achieved under 2 31 -1 pseudorandom binary sequence NRZ-DPSK signals measurement.