Fast-synchronization and low-timing-jitter self-clocking concept for 160 Gbit/s optical time-division multiplexing transmissions.
ABSTRACT We propose a self-clocking method based on in-band clock pilot insertion at the transmission data signal. The method can achieve clock recovery without the need for an ultrafast phase comparator and a phase-locked loop in the receiver. We demonstrate fast synchronization, low timing jitter, and a highly stable recovered clock from a 160 Gbit/s optical time-division multiplexing data signal after a 51 km fiber transmission. The recovered clock shows no patterning effect with a clock dynamic range of 10 dB for error-free operation of 160 to 40 Gbit/s demultiplexing with a power penalty of 1.1 dB.
- SourceAvailable from: ultrafast.ee.uec.ac.jp
[Show abstract] [Hide abstract]
- "As an effort to increase the capacity and transmission speed, one of the solutions is to combine wavelength division multiplexing (WDM) system with optical time division multiplexing (OTDM) system. High-repetition rates optical clock pulses are useful for ultrahigh-speed OTDM systems and all-optical signal processing  . "
ABSTRACT: In new optical pulse generator using delayed-interference-signal-wavelength-converter (DISC)-type all-optical gate, we injected sinusoidally modulated light to ring cavity. With this way, externally modulated laser oscillation and mode-locked pulse laser oscillation occurred. These generated pulse's widths and repetition frequencies are 27 ps, 10.5 GHz and 2.1 ps, 10.5 GHz, respectively.
- [Show abstract] [Hide abstract]
ABSTRACT: We demonstrate for the first time, to our knowledge, a clock-distribution method for ultra-high-speed optical time-domain multiplexed systems data packets that provides instantaneous synchronization, fast locking/unlocking times, and a highly stable bursty clock, enabling error-free operation of 160 to 10 Gbit/s time demultiplexing with a power penalty of 1.5 dB after 51 km transmission in standard single-mode fiber (ITU G.652).Optics Letters 10/2010; 35(19):3255-7. DOI:10.1364/OL.35.003255 · 3.18 Impact Factor
Conference Paper: All-optical clock recovery for OCDMA systems with optical time gating[Show abstract] [Hide abstract]
ABSTRACT: Implementing time gating in ultra-high speed OCDMA networks over long distance transmissions will require precise synchronization in order to suppress the influence of timing jitter on the OCDMA receiver. To implement optical gating, an optical clock is needed to control a switching window i.e., “a time gate” to pass the desired autocorrelation peak while blocking the MAI noise. We demonstrate that the use of a network global clock distribution is not necessary if the receiver synchronization is done via optical clock recovery. In our experimental demonstration a wider eye opening with power budget improvement of ~7.5 dB was achieved when using all-optical clock recovery compare to clock distribution.Telecommunications Forum (TELFOR), 2012 20th; 01/2012