Laser microphone

Patent · Tue Nov 14 00:00:00 EST 2000

OSTI ID:873379

Veligdan, James T ^[1]

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1. Manorville, NY

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.

• Research Organization: Associated Universities, Inc., Upton, NY (United States)
• DOE Contract Number: AC02-76CH00016
• Assignee: Brookhaven Science Associates (Upton, NY); Brookhaven National Laboratory (Upton, NY)
• Patent Number(s): US 6147787
• Application Number: 08/989,275
• OSTI ID: 873379
• Country of Publication: United States
• Language: English

Related Subjects

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
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