Nonlinear Dnamical Control of Laser Arrays

Period of Performance: 04/01/1994 - 03/30/1996

$587K

Phase 2 SBIR

Recipient Firm

Schwartz Electro-optics, Inc.
3404 N. Orange Blossom Trail
Orlando, FL 32804
Principal Investigator

Research Topics

Abstract

Schwartz Electro-Optics, Inc. (SEO) performed a study of nonlinear dynamical control of laser in the Phase I program. For a laser system with an external resonator containing a second harmonic generator (SHG), the total frequency doubled output is a superposition of the fields of all modes, and output intensity is proportional to E(z,t)2. For arbitrary values of the amplitude and phase of the various modes, the output intensity of this resonator fluctuates showing chaotic behavior. SEO utilized an innovative technique of "Frequency Pulling" to improve the stability of this system. A very short external cavity with a confocal geometry and a wavelength compensation plate was selected for a SHG crystal. The frequency pulled from this resonator provided continueous feedback into the pump laser resulting an improved amplitude stability of the doubled output. In the proposed Phase II study, we plan to use this technique in a high power, high repetition rate, diode pumped Nd:YAG laser. The output of the laser will be frequency doubled to 532 nm using a KTP crystal. The stabilized laser source will be integrated in a lidar with a global positioning system (GPS) and tested for the water floor mapping applications to the depth of 50 meters.