Semiconductor Laser as High Speed Functional Device.

Semiconductor Mode-Locked Laser for High-Speed OTDM Transmission

The aim of this work is to investigate semiconductor mode-locked lasers for their application as a transmitter pulse source in an optical time division multiplexing (OTDM) system with data rates up to 640 Gbit/s and with on-off keying (OOK) or differential phase shift keying (DPSK) modulation formats. Up to the present work there have not been any applications of the semiconductor mode-locked l...

Direct High-speed Exhaust Gas Measurement System Using Semiconductor Laser

Characterization of a High-Speed, High-Power Semiconductor Master-Oscillator Power-Amplifier (MOPA) Laser as a Free-Space Transmitter

Semiconductor lasers offer promise as high-speed transmitters for free-space optical communication systems. This article examines the performance of a semiconductor laser system in a master-oscillator power-amplifier (MOPA) geometry developed through a Small Business Innovation Research (SBIR) contract with SDL, Inc. The compact thermo-electric cooler (TEC) packaged device is capable of 1-W out...

Functional Speed Reserve as a Proxy for the Anaerobic Speed Reserve Using the Critical Speed Concept

Background: Although maximal sprint speed (MSS) and the anaerobic speed reserve (ASR) provides valuable information about the speed profile of athletes, these parameters fall short of providing important information about sub-maximal metabolic thresholds. The only field test that can offer an estimate of a sub-maximal metabolic threshold is the 3-minute all-out test for running (3MT) which deli...

Rigorous modeling of high-speed semiconductor devices

We present a review of industrial heterostructure devices based on SiGe/Si and III–V compound semiconductors analyzed by means of numerical simulation. A comparison of device simulators and current transport models is given and critical modeling issues are addressed. Results from two-dimensional hydrodynamic analyses of heterojunction bipolar transistors (HBTs) are presented in good agreement w...