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Monolithic light source is the only missing component to realize all silicon based photonics for high density and low power optical interconnections. In this paper, we will review our attempts to develop light-emitting devices based on silicon quantum wells made by state-of-the-art silicon process.
Power supply is one of the most important issues for autonomous underwater vehicles (AUVs) which have no umbilical cable connecting with their mother ships. Underwater glider can go forward without any propulsive machinery and it is extremely efficient in energy consumption. The purpose of this research is to study the feasibility of a solar-powered underwater glider so as to improve its long-term...
This paper describes a simple method for measuring the refractive index and absorption coefficient of silicon wafers in the Infrared (IR) wavelength range using a fiber probe. The proposed technique is applied in the wavelength range 1 to 1.7 microns. Results are compared to published models and a good agreement is obtained.
The emerging field of silicon photonics targets monolithic integration of optical components in the CMOS process, potentially enabling high bandwidth, high density interconnects with dramatically reduced cost and power dissipation. A broadband photonic switch is a key component of reconfigurable networks which retain data in the optical domain, thus bypassing the latency, bandwidth and power overheads...
We present the design of a silicon microsystem that utilizes dense, low-power photonic interconnects to enable a highly-compact supercomputer-scale system. We review recent progress in wavelength-division multiplexed, low-power silicon photonic interconnect components and discuss a future roadmap for the technology.
A low power modulator is monolithically integrated with a radiation hardened CMOS driver. This integrated optoelectronic device demonstrates 1.68mW power consumption at 2Gbps.
We present DWDM nanophotonics architectures based on microring resonator modulators and detectors. We focus on two implementations: an on chip interconnect for multicore processor (Corona) and a network that uses high-radix switches (HyperX). Based on the requirements of these applications we discuss the key constraints on the photonic circuits' devices and fabrication techniques as well as strategies...
We present a method of engineering the waveguide core refractive index locally on a silicon photonic chip using subwavelength gratings. Applications such as efficient waveguide crossings, fiber-chip couplers and multiplexer circuits are discussed.
We demonstrate a hybrid silicon Mach-Zehnder modulator having a voltage-length product of 2.4 V-mm and chirp parameter of -0.75. This modulator also has a modulation bandwidth of 25 GHz.
We report first 3-Gb/s data measurements for a photonic link including a microring modulator connected optically by a waveguide to a Germanium detector. Error-free operation is achieved with a 2-dB electrical power penalty.
Various photonic devices covering passive to active functions have been developed and monolithically-integrated on a silicon wire waveguide platform. Obstacles to practical applications are being eliminated by applying state-of-art fabrication technologies and unique device designs.
Polarization-independent wavelength path switching is demonstrated with one-chip silicon photonic circuit including 64 thermo-optical switch elements within 12mm × 3mm. Owing to uniformity, any path can be constructed by simply turning on one switch element.
We propose a novel fully-integrated scalable photonic switch architecture for data center networks, sustaining nonblocking 256×256 port size with nanosecond-scale switching times, interconnecting 2,560 server racks with 51.2-Tb/s bisection bandwidth.
A polarization diversity circuit in silicon waveguide was developed. The polarization dependent loss is 0.5 dB. The insertion loss from the polarization diversity components is 3 dB. The extinction ratio of the ring circuit is 20 dB.
By leveraging on the wealth of Si-CMOS technology know-how and the largely available infrastructures, the fundamental photonic device building blocks and circuit integration platform, essential for the realization of the electronic-photonic integrated circuit (EPIC), have been successfully developed. This presentation gives an overview on the current status of this critical technology and provides...
Silicon nanophotonics provides computer architects with the ability to solve pin bandwidth and cross-chip communication problems. Furthermore, ring resonators can be used to create simple optical circuits to implement low-latency global arbitration.
Significant progress in silicon photonics has led to flattop filters, polarization independence, low power modulators and switches, and low dark current germanium detectors. Future challenges reside in implementing silicon photonic networks.
The nonlinear propagation characteristics in a hydrogenated amorphous silicon core optical fiber are investigated to demonstrate ultra-fast all-optical switching by cross-absorption modulation.
A liquid crystal (LC) cell made of silicon (Si) electrodes was fabricated to achieve self-routing of optical signals. As optical pulses (1.06 μm wavelength) passed through the cell, they excited free carriers in the Si electrode, which triggered the voltage application to the LC layer. Consequently, the polarization direction of the succeeding pulses became perpendicular to that of the preceding pulses,...
Epitaxial Lateral Overgrowth has been proposed as a key technology of a novel hybrid integration platform for active silicon photonic components. By optimizing the process, a dislocation free InP layer has been successfully grown on top of silicon wafer, which can be used as the base for active devices.
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