Accession Number : ADA289181

Title :   Characterization of Microwave MESFET Circuits under Laser Illumination. Applications to Phased Array Radar, Microwave Communications, and Digital Clock Control.

Descriptive Note : Doctoral thesis,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Genco, Sheryl M.

PDF Url : ADA289181

Report Date : OCT 1994

Pagination or Media Count : 411

Abstract : Optical injection of MESFETs directly affects the operating characteristics of the devices. The MESFET properties, induced by optical injection, can stabilize oscillator operating frequency, control amplifier gain, and open the door for feasible integrated microwave-optical devices. The optical injection of DC MESFETs, oscillators, and amplifiers is explored. Systems applications, including phased array radar, wave division multiplexing (WDM) and computer clock control, are provided. The main contributions of this research are analyzing the modulation properties of the locked laser subsystem, using the locked laser system to inject MESFET devices and characterizing the photo-effects in MESFET circuits, reducing the phase noise in a microwave oscillator via optical injection and developing a theoretical description of the injection properties of oscillators that can be used to describe an injection locked laser and a microwave oscillator with a change of constants.

Descriptors :   *INJECTION LASERS, *RADAR, *OPTICAL CIRCUITS, *MICROWAVE COMMUNICATIONS, *MICROWAVE OSCILLATORS, *MICROWAVE OPTICS, OSCILLATORS, DIGITAL SYSTEMS, INJECTION, OPTICAL PROPERTIES, SYSTEMS ENGINEERING, ELECTROOPTICS, CLOCKS, COMPUTERS, THESES, FABRICATION, FIELD EFFECT TRANSISTORS, ILLUMINATION, METAL OXIDE SEMICONDUCTORS, GAIN, MULTIPLEXING, AMPLIFIERS, PHASED ARRAYS, NOISE(ELECTRICAL AND ELECTROMAGNETIC), LIGHT MODULATORS, PHOTOCONDUCTIVITY, MODE LOCKED LASERS.

Subject Categories : Electrical and Electronic Equipment
      Lasers and Masers
      Electrooptical and Optoelectronic Devices
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE