INTERACTION STUDIES OF LASER BEAMS INTERSECTING IN AN ACTIVE MEDIUM (CROSSED BEAM LASER)
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1968
- Accession Number
- AD0836833
Entities
People
- David K. Duston
Organizations
- General Electric