Accession Number : ADD011341

Title :   External Cavity Diode Laser Sensor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Miles,R O ; Giallorenzi,T G ; Tveten,A B

Report Date : 05 Jun 1984

Pagination or Media Count : 8

Abstract : This document describes a sensor for sensing conditions such as acoustic waves, temperature changes, acceleration current and magnetic fields. The sensor employs a diode laser having its cavity contained between end facets defined by partially reflective mirrors, supplemented by an external cavity formed between one of the end facets of the laser and a translatable external reflector. The reflector is position-responsiveness to a condition to be sensed. A change in the reflector's positions causes laser output light to be fed back through the mirror into the laser cavity with varying phase such that an increase or decrease in laser emission is created. A change of detector voltage or change in laser current provides an indication of environmental condition being sensed. (Author)

Descriptors :   *Patents, *Detectors, *Laser applications, Diodes, Acoustic waves, Voltage, Magnetic fields, Laser cavities, Reflectors, Laser beams, Output, Emission

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE