40 Gb/s all-optical unicast and multicast wavelength converter array on an InP monolithically integrated chip fabricated by MPW technology.

We present an InP monolithically integrated all-optical wavelength converter array chip and experimentally validate its performance for unicast (single output wavelength) and multicast (multiple output wavelengths) wavelength conversion. The monolithically integrated chip includes four semiconductor optical amplifiers with an arrayed-waveguide grating and two delayed interferometers. The chip is fabricated on a multi-project wafer (MPW) platform, which allows multiple designers to share space on the same wafer exploiting a generic integration platform. We demonstrate error-free non-return-to-zero (NRZ) unicast wavelength conversions using 231-1 pseudorandom bit sequence data at 10 Gb/s, 20 Gb/s and 40 Gb/s with a 25-nm conversion range. Power penalties as low as 2.3 dB and 2.7 dB for NRZ and return-to-zero (RZ) unicast wavelength conversion at 40 Gb/s are obtained, respectively. Additionally, power penalties of 2.5 dB for NRZ and 3.2 dB for RZ signals at 40 Gb/s 1 × 2 multicast wavelength conversions are also achieved.

Multiport InP monolithically integrated all-optical wavelength router.

An indium phosphide-based monolithically integrated wavelength router is demonstrated in this Letter. The wavelength router has four input ports and four output ports, which integrate four wavelength converters and a 4×4 arrayed-waveguide grating router. Each wavelength converter is achieved based on cross-gain modulation and cross-phase modulation effects in a semiconductor optical amplifier. Error-free wavelength switching for a non-return-to-zero 231-1 ps eudorandom binary sequence at 40 Gb/s data rate is performed. Both 1×4 and 3×1 all-optical routing functions of this chip are demonstrated for the first time with power penalties as low as 3.2 dB.

Error-free 320-to-40-Gbit/s optical demultiplexing based on blueshift filtering in a quantum-dot semiconductor optical amplifier.

We present an ultrahigh-speed optical demultiplexing concept based on optical blue-shift filtering in a quantum-dot semiconductor optical amplifier (QD-SOA). Using a simple scheme, a QD-SOA and an optical bandpass filter, we have successfully achieved error-free operations at 40 Gbit/s on all the extracted tributaries from an aggregated traffic at 320 Gbit/s.

A single InP-on-SOI microdisk for high-speed half-duplex on-chip optical links.

We demonstrate for the first time that a single compact, electrically contacted indium phosphide based microdisk heterogeneously integrated on a silicon-on-insulator waveguide can be used as both a high-speed modulator and photo detector. We demonstrate high-speed operation up to 10 Gb/s and present bit-error rate results of both operation modes.

A novel 3D stacking method for Opto-electronic dies on CMOS ICs.

A high speed, high density and potentially low cost solution for realizing a compact transceiver module is presented in this paper. It is based on directly bonding an Opto-electronic die on top of CMOS IC chip and creating a photoresist ramp to bridge the big step (around 220 µm) from Opto-electronic pads to CMOS IC pads. The required electrical connection between them is realized lithographically with a process than can be scaled to full wafer production. A 12-channel transmitter based on the technique was fabricated and test shows good performance up to 12.5 Gb/s/ch.

A low-power high-speed InP microdisk modulator heterogeneously integrated on a SOI waveguide.

We report on the modulation characteristics of indium phosphide (InP) based microdisks heterogeneously integrated on a silicon-on-insulator (SOI) waveguide. We present static extinction ratios and dynamic operation up to 10 Gb/s. Operation with a bit-error rate below 1 × 10(-9) is demonstrated at 2.5, 5.0 and 10.0 Gb/s and the performance is compared with that of a commercial modulator. Power penalties are analyzed with respect to the pattern length. The power consumption is calculated and compared with state-of-the-art integrated modulator concepts. We demonstrate that InP microdisk modulators combine low-power and low-voltage operation with low footprint and high-speed. Moreover, the devices can be fabricated using the same technology as for lasers, detectors and wavelength converters, making them very attractive for co-integration.

320 Gbit/s wavelength conversion using four-wave mixing in quantum-dot semiconductor optical amplifiers.

In this study, we demonstrate error-free all-optical wavelength conversion of ultrahigh-speed intensity modulated signals by means of four-wave mixing in a quantum-dot semiconductor optical amplifier. Error-free performance at a bit rate of 320 Gbit/s is measured for the extracted 40 Gbit/s tributaries with a 3.4 dB average power penalty to the original signal.

Ultrafast and bias-free all-optical wavelength conversion using III-V-on-silicon technology.

Using a 7.5 µm diameter disk fabricated with III-V-on-silicon fabrication technology, we demonstrate bias-free all-optical wavelength conversion for non-return-to-zero on-off keyed pseudorandom bit sequence (PRBS) data at the speed of 10 Gbits/s with an extinction ratio of more than 12 dB. The working principle of such a wavelength converter is based on free-carrier-induced refractive index modulation in a pump-probe configuration. We believe it to be the first bias-free on-chip demonstration of all-optical wavelength conversion using PRBS data. All-optical gating measurements in the pump-probe configuration with the same device have revealed that it is possible to achieve wavelength conversion beyond 20 Gbits/s.

Ultrahigh-speed and widely tunable wavelength conversion based on cross-gain modulation in a quantum-dot semiconductor optical amplifier.

We present ultrahigh-speed and full C-band tunable wavelength conversions using cross-gain modulation in a quantum-dot semiconductor optical amplifier (QD-SOA). In this study, we successfully demonstrated error-free 320-Gbit/s operation of an all-optical wavelength converter (AOWC) using the QD-SOA for the first time. We also demonstrated full C-band tunable operation of the AOWC in the wavelength range between 1535 nm and 1565 nm at a bit rate of 160-Gbit/s.

Multichannel wavelength conversion of 50-Gbit/s NRZ-DQPSK signals using a quantum-dot semiconductor optical amplifier.

We demonstrate simultaneous four-channel wavelength conversion of 50-Gbit/s non-return-to-zero differential quadrature-shift-keying signals with a channel spacing of 100-GHz using a quantum-dot semiconductor optical amplifier. Error-free operations with low-power penalties are successfully achieved with various channel configurations.