Accession Number : ADA309716

Title :   Physics and Applications of Coherently Coupled Phase Conjugators.

Descriptive Note : Final rept. 1 Mar 91-31 Dec 95,

Corporate Author : ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s) : McMichael, I.

PDF Url : ADA309716

Report Date : MAY 1996

Pagination or Media Count : 161

Abstract : This contract focused on the physics and applications of coherently coupled phase conjugators. Of particular interest is the physics of mutually pumped phase conjugation (MPPC) and its application to wavefront matched heterodyne communications. This application requires a nonlinear optical Kerr media that is capable of high gain. Under this contract we demonstrated a beam coupling gain of 22 times by the process of nondegenerate two wave mixing in a crystal of chromium doped yttrium orthoaluminate. This is currently the largest continuous wave gain obtained in a solid state non-photorefractive material and it is within a factor of two of that required for MPPC. We used this gain to demonstrate self oscillations in which an oscillation spontaneously builds up between the opposing surfaces of a crystal, when a single beam is incident. Calculations show that significantly higher gain should be possible. This result should be of general interest to the nonlinear optics community since will allow researchers to study continuous wave oscillators and self pumped conjugators, with properties different from those using photorefractives. In addition, a theoretical study of Brillouin induced mutually pumped phase conjugation in the reflection geometry was completed, and we present the first solutions to the transcendental equation that illustrate the potential of large dynamic range that is required in applications such as wavefront matched heterodyne communications.

Descriptors :   *OPTICAL COMMUNICATIONS, *KERR MAGNETOOPTICAL EFFECT, COUPLING(INTERACTION), OSCILLATORS, HETERODYNING, CONTINUOUS WAVES, OPTICAL MATERIALS, NONLINEAR OPTICS, REFLECTION, GAIN, MATCHING, WAVEFRONTS, DYNAMIC RANGE, TRANSCENDENTAL FUNCTIONS, PHASE CONJUGATION.

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE