Laser microphone

Patent · Tue Nov 14 04:00:00 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: ASSOC UNIVERSITIES INC
• 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

/359/
acoustic
acoustic signal
aligned
aligned coaxially
beam
cell
coaxially
communication
detecting
displaced
disposed
laser
laser beam
laser material
laser resonator
laterally
material
microphone
mirror
mirrors
optical
optical communication
pair
photodetector
portion
pressure
pressure wave
pressure waves
produces
producing
receiving
reference
reference cell
reference portion
resonator
sensing
signal
sound
sound pressure
sound wave
sound waves
therefrom
transmitting
waves