All-optical time-division demultiplexing of 160 Gbit/s signal using cascaded second-order nonlinear effect in quasi-phase matched LiNbO/sub 3/ waveguide device

Using the cascade of the second-harmonic generation and the difference frequency mixing in a 30 mm-long quasi-phase matched LiNbO/sub 3/ waveguide device, all-optical time-division demultiplexing of a 160 Gbit/s signal into 10 Gbit/s channels is demonstrated. The power penalty is as small as 2.5 dB at the bit error rate of 10/sup -9/, which is attributed to crosstalk of the switch.     

Investigation of all-optical error detection circuit using SOA-MZI-based XOR gates at 10 Gbit/s

The operation of an all-optical error detection circuit consisting of an all-optical exclusive OR (XOR) gate for an encoder and two-stage all-optical XOR gates for a decoder using SOA-MZIs has been investigated. 10 and 40 Gbit/s operation of all-optical XOR gates were obtained. Error signals in the syndrome at 10 Gbit/s based on the all-optical XOR gates were achieved for the first time.     

10 Gbit/s all-optical regenerator

A 10 Gbit/s optical data stream has been regenerated all-optically by clock recovery and remodulation. The regenerator consists of a fibre ring laser, modelocked by the incoming data stream, and a Kerr shutter acting as an all-optical AND gate to recode the ring laser pulses with the incoming data. Error ratio measurements for an all-optical regenerator are presented for the first time and the future potential of all-optical regeneration is discussed     

Demonstration of 20 Gbit/s all-optical logic XOR in integratedSOA-based interferometric wavelength converter

The results of optical logic exclusive-OR (XOR) at up to 20 Gbit/s in an integrated SOA-based Mach-Zehnder interferometer are presented. For the first time, to the knowledge of the authors, BER measurements are demonstrated on 10 Gbit/s optical logic XOR, with zero penalty. In addition. For the first time 20 Gbit/s all-optical XOR, with an integrated device that allows simple, stable, and efficient operation, is demonstrated     

40 Gbit/s all-optical demultiplexing using a monolithicallyintegrated Mach-Zehnder interferometer with semiconductor laseramplifiers

The authors demonstrate all-optical error-free demultiplexing of 10, 20 and 40 Gbit/s to 5 Gbit/s data signals by using a monolithically integrated Mach-Zehnder interferometer with two semiconductor laser amplifiers     

160 Gbit/s SOA all-optical wavelength converter and assessment of its regenerative properties

The retiming and reshaping properties of a 160 Gbit/s all-optical wavelength converter based on a semiconductor optical amplifier gating delay interferometer configuration is investigated. 160 Gbit/s operation is performed with as little as -3.5 dBm input signal.     

All-optical time-division demultiplexing experiment withsimultaneous output of all constituent channels from 100 Gbit/s OTDMsignal

The successful demonstration of all-optical time-division demultiplexing is reported, wherein all 10 Gbit/s constituent channels are simultaneously demultiplexed with no error from a 10×10 Gbit/s OTDM signal. A multichannel demultiplexer based on cross phase modulation (XPM)-induced frequency shift in an optical fibre, called MOXIC, is used     

200 Gbit/s, 100 km time-division-multiplexed optical transmissionusing supercontinuum pulses with prescaled PLL timing extraction andall-optical demultiplexing

A single channel, single polarisation 200 Gbit/s time-division-multiplexed optical transmission experiment is successfully demonstrated using optical short pulses generated by supercontinuum. A prescaled clock is recovered directly from the 200 Gbit/s signal to drive an all-optical demultiplexer     

Multiple-output, 100 Gbit/s all-optical demultiplexer based onmultichannel four-wave mixing pumped by a linearly-chirped square pulse

A novel ultrafast multiple-output all-optical time-domain demultiplexer is proposed based on multiwavelength-channel four-wave mixing with a linearly-chirped supercontinuum square pump pulse. Error-free, simultaneous four-output, 100 Gbit/s to 6.3 Gbit/s demultiplexing of a 0.42 ps signal pulse train has been demonstrated for the first time     

100 Gbit/s, 50 km, and nonrepeated optical transmission employing all-optical multi/demultiplexing and PLL timing extraction

A 16*6.3 Gbit/s, time-and-polarisation division multiplexed optical signal is successfully transmitted through a 50 km dispersion shifted singlemode fibre employing all-optical multi/demultiplexing. A 6.3 GHz timing clock is directly extracted from the multiplexed 100 Gbit/s optical signal by a phase locked loop (PLL) using a travelling-wave laser diode amplifier. A wavelength-tunable modelocked Er/sup 3+/-fibre ring laser and a planar-lightwave-circuit time division multiplexer are newly developed for this experiment.<>     

100 Gbit/s all-optical wavelength conversion with integrated SOAdelayed-interference configuration

The authors report all-optical 100 Gbit/s wavelength conversion employing cross-phase modulation for the first time. We use a fully integrated and packaged SOA delayed-interference configuration (SOA-DI) that comprises a monolithically integrated delay loop, phase shifter and tunable coupler. Only one input and one output fibre is needed to operate the device, which simplifies packaging     

100 Gbit/s optical signal generation by time-divisionmultiplication of modulated and compressed pulses from gain-switcheddistributed feedback (DFB) laser diode

An all-optical spatial time-division multiplexer is demonstrated using fibre-type 2×2 couplers and fibre delay lines. 100 Gbit/s modulated optical signals are successfully generated by 32-times multiplication of 3.125 Gbit/s, 6 ps compressed pulses, from a gain-switched DFB laser diode     

80 Gbit/s ATM switch MCM based on multilayer ceramic technology

An 80 Gbit/s asynchronous transfer mode (ATM) switch multichip module (MCM) of dimensions 114×160×6.5 mm has been fabricated. This MCM can support high-density mounting and high-speed interconnection among large-scale-integrated (LSI) chips. Using LSI, ceramic-substrate, high-speed/high-power connector, and compact liquid-cooling technologies, an 80 Gbit/s ATM switching module has been built     

640 Gbit/s (64-Wavelength $,times,$10 Gbit/s) Data-Rate Wide-Colored NRZ-DPSK Optical Packet Switching and Buffering Demonstration

We demonstrated optical packet switching and buffering operation of a DWDM/NRZ-DPSK optical packet, whose payload-data-rate is 640 Gbit/s (64-wavelength$,times,$10 Gbit/s), for transparent optical packet switch systems for the first time. Error-free (bit-error-rate ${≪}10^{- 9}$) operation including 200-Gchip/s PSK optical label processing was achieved for all 64-wavelength-channel 10 Gbit/s DPSK packet-payloads. In addition, the higher tolerance of DPSK format for packet power fluctuation compared with OOK one was verified in an optical packet switch system.      

All-optical wavelength conversion at 160 Gbit/s using SOA and silicon-on-insulator photonic circuit

Error-free operation of an all-optical wavelength converter at 160 Gbit/s based on a semiconductor optical amplifier and a silicon-on-insulator photonic circuit, consisting of two cascaded Mach-Zehnder delay interferometers, is demonstrated.     

Interface for 10 Gbit/s bit-synchronisation and format andwavelength conversion with 3R regenerative capabilities

An interface for converting non-return to zero (NRZ) and RZ input signals to RZ output signals at 10 Gbit/s based on two all-optical wavelength converters is demonstrated. The interface performs bit-synchronisation and format and wavelength conversion combined with 3R regenerative capabilities, including jitter-to-amplitude modulation transfer suppression     

40 Gbit/s all-optical clock recovery using two-section gain-coupledDFB laser and semiconductor optical amplifier

40 Gbit/s wavelength and polarisation insensitive all-optical clock recovery using a two-section distributed feedback (DFB) laser has been demonstrated. The polarisation sensitivity of the two-section DFB laser was solved by converting incoming data onto a local laser through cross-gain modulation using a semiconductor optical amplifier. The scheme has a sensitivity of -13 dBm     

Monolithically integrated nonlinear Sagnac interferometer and itsapplication as a 20 Gbit/s all-optical demultiplexer

A Sagnac interferometer consisting of a semiconductor laser amplifier and a 3 dB coupler monolithically integrated within a waveguide loop mirror is fabricated and its application as a 20 Gbit/s all-optical demultiplexer is demonstrated     

40 Gbit/s RZ wavelength converter in a monolithically integrated chip with a tunable laser

An all-optical wavelength-switch module with 40 Gbit/s capacity is integrated monolithically in InP. The device combines an SOA-based wavelength converter and a fast-tunable 8-channel multi-frequency laser. Error-free operation is demonstrated.     

PPLN-based all-optical 40 Gbit/s three-input logic AND gate for both NRZ and RZ signals

Reported is an all-optical high-speed three-input logic AND gate using cascaded sum- and difference-frequency generation (cSFG/DFG) in a periodically poled lithium niobate (PPLN) waveguide. The converted idler wave via cSFG/DFG carries the AND result of the three-input signals. PPLN-based 40 Gbit/s three-input logic AND operations for both non-return-to-zero (NRZ) and return-to-zero (RZ) signals are successfully demonstrated in the experiment.