Method of remotely measuring subsurface water temperatures by st

Details Method of remotely measuring subsurface water temperatures by st Method of remotely measuring subsurface water temperatures by st

1990-04-09

1991-06-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356301, 356 43, 374136, 374161, G01J 548, G01J 344

Patent

active

050269992

ABSTRACT:
A technique for measuring the unknown subsurface temperature T of a bulk transparent medium such as sea water by focussing a high intensity pulsed laser beam in a first direction into the water to a predetermined depth D, producing stimulated Brillouin scattering (SBS) in a second direction opposite to the first direction and generating from the SBS stimulated Raman scattering (SRS) in the second direction, analyzing the spectra of the SRS and determining therefrom the temperature T. The depth D is is selected to insure that the entire SBS pulse is in the water.

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Vladimir V. Shjunov et al., "Optical Phase Conjugation", Scientific American, Dec. 1985, pp. 54-59.
David M. Pepper, "Applications of Optical Phase Conjugation", Scientific American, Jan. 1986, pp. 74-83.
B.Ya. Zel'dovich, N. F. Pilipetsky, V. V. Shkunov, "Principles of Phase Conjugation", Springer-Verleg, vol. 42, p. 29, Springer Series on Optical Sciences (Springer Verlag Berlin Heidelberg, 1985).

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