Non-linear optical crystal vibration sensing device

Patent · Tue Jan 11 04:00:00 EST 1994

OSTI ID:869431

Kalibjian, Ralph ^[1]

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1. Livermore, CA

A non-linear optical crystal vibration sensing device (10) including a photorefractive crystal (26) and a laser (12). The laser (12 ) produces a coherent light beam (14) which is split by a beam splitter (18) into a first laser beam (20) and a second laser beam (22). After passing through the crystal (26) the first laser beam (20) is counter-propagated back upon itself by a retro-mirror (32), creating a third laser beam (30). The laser beams (20, 22, 30) are modulated, due to the mixing effect within the crystal (26) by vibration of the crystal (30). In the third laser beam (30), modulation is stable and such modulation is converted by a photodetector (34) into a usable electrical output, intensity modulated in accordance with vibration applied to the crystal (26).

• Research Organization: University of California; Michael J Hughes
• Sponsoring Organization: United States Department of Energy
• DOE Contract Number: AC03-89SF18433
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 5335548
• OSTI ID: 869431
• Country of Publication: United States
• Language: English

Related Subjects

/73/356/359/
10
12
14
18
20
22
26
30
32
34
accordance
applied
beam
beam splitter
beams
coherent
coherent light
converted
counter-propagated
creating
crystal
crystal vibration
device
due
effect
electrical
electrical output
including
intensity
intensity modulated
laser
laser beam
laser beams
light
light beam
mixing
modulated
modulation
non-linear
non-linear optical
optical
optical crystal
output
passing
photodetector
photorefractive
photorefractive crystal
produces
retro-mirror
sensing
sensing device
split
splitter
stable
third
usable
vibration
vibration sensing