Method of remotely detecting submarines using a laser

Details Method of remotely detecting submarines using a laser Method of remotely detecting submarines using a laser

1988-07-20

1990-01-16

Rosenberger, Richard A.

Optics: measuring and testing

Optical pyrometers

356349, 374123, 374136, 374137, G01J 500

Patent

active

048939242

ABSTRACT:
Subsurface waves in an ocean are created by the turbulence in a submarine's wake. These waves can be remotely detected by a search submarine by monitoring subsurface water temperatures using a laser. A pulsed laser beam is directed into the water to at least the depth of the thermocline and an analysis is made of the resultant Brillouin and Rayleigh backscatter components. Wavelength shifted Brillouin scatter is mixed with the unshifted Rayleigh scatter in a self-heterodyne manner for each volume element of illuminated water, and the frequency of the heterodyne signal is measured and converted into equivalent temperature values. This produces the desired temperature-depth profile of the water enabling detection of the first submarine by tracking the internal waves at or near the ocean thermocline.

REFERENCES:
patent: 4195931 (1980-04-01), Hara
patent: 4429994 (1984-02-01), Guagliardo et al.
patent: 4767219 (1988-08-01), Biddy

Affiliated with

Also associated with

Rating

Method of remotely detecting submarines using a laser does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of remotely detecting submarines using a laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of remotely detecting submarines using a laser will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1331681