High Brightness Diode Lasers for Blue-Green Applications
Abstract
The threshold for self-pumped optical phase conjugation via stimulated photorefractive scattering has been dramatically lowered by inserting a diffusely retroreflecting screen in the path of the beam exiting the crystal. Stable reflectivities of up to about 60% have been demonstrated in a crystal having too low a gain-length product to exhibit unseeded backward stimulated scattering. The phase-conjugate fidelity is also very good. This conjugator offers many practical advantages over previous photorefractive phase conjugators. The threshold of the device can be precisely controlled by adjusting the attenuation of the seed. The device operates both in the visible and at the infrared diode laser wavelengths. The conjugator's reflectivity and fidelity have been experimentally characterized as a function of the following parameters: pump and seed intensity, crystal angle with respect to the incident beam direction, crystal interaction length, crystal-lens separation, and aberration strength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1990
- Accession Number
- ADA360081
Entities
People
- D. J. Vickers
- D. M. Pepper
- G. C. Valley
- R. A. Mullen
- R. C. Lind
Organizations
- HRL Laboratories