Accession Number:

ADD015579

Title:

Method and Apparatus for Generating Fraunhofer Line Laser Source using Stimulated Raman Scattering.

Descriptive Note:

Patent, Filed 16 May 91, patented 25 Aug 92,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1992-08-25

Pagination or Media Count:

5.0

Abstract:

The present invention provides an apparatus and method for generating blue laser light having a wavelength corresponding to a solar Fraunhofer line. The blue laser light is at a frequency that has both excellent transmissibility through sea water and a high signal-to-ise ratio. A first laser beam, generated using an injection-locked excimer XeCl laser, is down-converted by a first-Stokes order shift of 2 x 4155 cm 1 in a first Raman cell containing H2 gas at a pressure of about 10 atmospheres. The output of the first Raman cell is down-converted by a first Stokes shift of 3628cm in a second Raman cell containing HD at a pressure of about 10 atmospheres so that the output of the second Raman cell has a wavelength of 486.366 nm. This wavelength corresponds to the FE I solar Fraunhofer line.

Subject Categories:

  • Lasers and Masers
  • Astrophysics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE