Accession Number:

AD0836833

Title:

INTERACTION STUDIES OF LASER BEAMS INTERSECTING IN AN ACTIVE MEDIUM (CROSSED BEAM LASER)

Descriptive Note:

Semi-annual technical summary rept. no. 4, 1 Aug 1967-31 Jan 1968

Corporate Author:

GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER

Personal Author(s):

Report Date:

1968-02-01

Pagination or Media Count:

25.0

Abstract:

The frequency pulling effect of the probe laser due to undesired signal injection from the Q-switched perturbing laser was eliminated by placing an isolator in the optical path of the probe laser beam, changing the beam splitter which combines the probe and perturbing beams from a 50 - 50 to a 92 - 8 beam splitter, and increasing the reflectivity of the probe laser output mirror by 10. The output energy of the probe laser was increased to overcome the additional losses introduced into the system. The Q-switched perturbing laser was changed from an oscillator to an oscillator-amplifier combination to obtain an energy output exceeding 5 joules, and a pulse width of 40 nanoseconds. Interaction amplifier experiments with a liquid nitrogen cooled 2 Nd-doped glass laser rod were initiated. However, the scattered light from the perturbing laser beam over-exposed the streak photographs. An eight step density transmission wedge 21 dB was used as a calibration technique. It was photographed on one side of the streak photograph, and the wedge exposure as well as the spectral streaks were measured with a densitometer. By using an electron microscope photographic technique, a study revealed that AOLux 0835 Nd- doped glass is a single phase material.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE