Remote Sensors Using Hybrid Phase-Conjugator/Modulators

David M. Pepper

doi:10.1117/12.939704

22 April 1988 Remote Sensors Using Hybrid Phase-Conjugator/Modulators

David M. Pepper

Proceedings Volume 0739, Phase Conjugation, Beam Combining, and Diagnostics; (1988) https://doi.org/10.1117/12.939704
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

We describe the use of a single crystal of BaTiO3 as a phase-conjugator/modulator. This class of retromodulator is alignment-free, simple, and passive. By applying a time-varying electric field across a self-pumped phase conjugate mirror, simultaneous wave-front reversal and temporal modulation encoding occur within the same volume. With modest signal fields (-4120 V/cm) we observe 100% depth-of-phase modulation, with a measured bandwidth in excess of 1 MHz (scalable to >10 GHz), and with excellent conjugation fidelity. Furthermore, we observe a conjugate reflectivity of -73% using this simple geometry. Applications of such devices to remote free-space and fiber sensors and to phase-conjugator resonator configurations are discussed.

Citation Download Citation

David M. Pepper "Remote Sensors Using Hybrid Phase-Conjugator/Modulators", Proc. SPIE 0739, Phase Conjugation, Beam Combining, and Diagnostics, (22 April 1988); https://doi.org/10.1117/12.939704

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