Accession Number:

ADA110159

Title:

Scaling Studies on Efficient Raman Converters

Descriptive Note:

Technical rept. 21 Mar 1980-20 Mar 1981

Corporate Author:

NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA

Personal Author(s):

Report Date:

1981-12-01

Pagination or Media Count:

54.0

Abstract:

Injection locking performance of a 1 micro set XeF laser pulse and Raman converter scaling have been investigated. Narrowband ultraviolet radiation from a frequency-doubled dye laser has been used to control the linewidth and polarization of a long pulse-length electron beam-excited XeF laser. Linewidths of 0.004 nm have been achieved in the 353 nm band of the XeF B yields X Laser transition. Over 90 of the energy in the free-running laser pulse has been extracted in the narrowband injection-locked pulse. Ratios of injection signal power to output laser power on the order of .00001 are adequate for efficient injection-locking to occur. Efficient Raman conversion of microsecond-pulse, injection-locked XeF 353 nm laser radiation into the blue-green region via the second Stokes shift in hydrogen has been demonstrated using a Raman oscillator- amplifier scheme. Strong depletion of the pump and the first Stokes radiation accompanied by a dominant second Stokes 500 nm output was observed for the first time. Amplifier power conversion efficiency of 43 was achieved along with a blue-green output energy of 1.7 J at an energy efficiency of 34. These data support Raman converter scaling analyses which predict feasibility of efficient XeF-to-blue-green conversion at higher energies.

Subject Categories:

  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE