We present a tunable delay element that is inherently insensitive to free-carrier loss and achieves up to nanosecond delays even when tuned slowly. This will enable electrically tunable buffers on a silicon chip. ©2009 Optical Society of America OCIS codes: (130.3120) Integrated optics devices ; (230.5750) Resonators ;(230.2090) Electro-optical devices

Higher data throughput in optical packet switched interconnection networks can be achieved by minimizing the guard times through faster transition of the switching element. A hybrid integration of a semiconductor optical amplifier with its current driver is presented, which exhibits over 40 % faster transition time compared to current commercial devices.

Fiber loss is a fundamental limitation in realizing long haul point to point fiber optical communication links and optical network. One of the advance technology in the recent year is the advent of ERBIUM DOPED FIBER AMPLIFIER. It is essential element in DWDM .In this paper gain and performance analysis of EDFA has been studied.

In this paper, physical modeling including optical and Casimir forces is adopted in order to analyze a nano-opto-mechanical actuator based on silicon-on-insulator suspended slot waveguides. Numerical simulations based on the finite element method and systematic design rules are presented. Moreover, parametric investigations on slot waveguide sizes and optical properties are presented, and their...

With simple optical geometries a separate resonant Fabry-Perot cavity can serve as an optical feedback element that forces a semiconductor laser automatically to lock its frequency optically to the cavity resonance. This method is used to stabilize laser frequencies and reduce linewidths by a factor of 1000 from 20 MHz to approximately 20 kHz.

The goal of the research reported here was the development of a circuitbased modeling procedure for both the passive and active components of a quasi-optical power combiner. Contributions include the development of a multi-port equivalent circuit of a multi-element quasi-optical power combiner. Excellent agreement with experimental results was obtained. Mount independent techniques "were also d...

We present the optical design of a laboratory demonstrator for a low-order adaptive optics system with possible application to improving the performance of a free-space optical communication system. The initial design includes a Shack-Hartmann wavefront sensor with high-speed CMOS camera and a 37-element membrane mirror.