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Title: Laser microphone

Abstract

A microphone for detecting sound pressure waves includes a laser resonator having a laser gain material aligned coaxially between a pair of first and second mirrors for producing a laser beam. A reference cell is disposed between the laser material and one of the mirrors for transmitting a reference portion of the laser beam between the mirrors. A sensing cell is disposed between the laser material and one of the mirrors, and is laterally displaced from the reference cell for transmitting a signal portion of the laser beam, with the sensing cell being open for receiving the sound waves. A photodetector is disposed in optical communication with the first mirror for receiving the laser beam, and produces an acoustic signal therefrom for the sound waves.

Inventors:
 [1]
  1. Manorville, NY
Issue Date:
Research Org.:
Associated Universities, Inc., Upton, NY (United States)
OSTI Identifier:
873379
Patent Number(s):
6147787
Application Number:
08/989,275
Assignee:
Brookhaven Science Associates (Upton, NY); Brookhaven National Laboratory (Upton, NY)
Patent Classifications (CPCs):
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04R - LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04B - TRANSMISSION
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
laser; microphone; detecting; sound; pressure; waves; resonator; material; aligned; coaxially; pair; mirrors; producing; beam; reference; cell; disposed; transmitting; portion; sensing; laterally; displaced; signal; receiving; photodetector; optical; communication; mirror; produces; acoustic; therefrom; reference cell; laser resonator; reference portion; pressure waves; optical communication; sound waves; laser beam; laser material; acoustic signal; pressure wave; aligned coaxially; sound pressure; sound wave; /359/

Citation Formats

Veligdan, James T. Laser microphone. United States: N. p., 2000. Web.
Veligdan, James T. Laser microphone. United States.
Veligdan, James T. Tue . "Laser microphone". United States. https://www.osti.gov/servlets/purl/873379.
@article{osti_873379,
title = {Laser microphone},
author = {Veligdan, James T},
abstractNote = {A microphone for detecting sound pressure waves includes a laser resonator having a laser gain material aligned coaxially between a pair of first and second mirrors for producing a laser beam. A reference cell is disposed between the laser material and one of the mirrors for transmitting a reference portion of the laser beam between the mirrors. A sensing cell is disposed between the laser material and one of the mirrors, and is laterally displaced from the reference cell for transmitting a signal portion of the laser beam, with the sensing cell being open for receiving the sound waves. A photodetector is disposed in optical communication with the first mirror for receiving the laser beam, and produces an acoustic signal therefrom for the sound waves.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {11}
}