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Proceedings Paper

Observation of laser formation inside a laser cavity containing a phase conjugate mirror
Author(s): Frank F. Wu
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Paper Abstract

Adaptive optics (AO) systems are used to compensate atmospheric perturbations on a propagating laser beam. However, AO needs a beacon to obtain the phase information. This paper presents a possible formation of beacon in target-in-theloop (TIL) geometry which is analog to a laser cavity. The TIL laser cavity is formed with a high reflectivity mirror on one end and an optical phase conjugate mirror as the second mirror. The TIL laser is initialized by a single frequency 10 ns Q-switched laser pulse. This is very similar to how an injection seeding or regenerative amplifier scheme starts a laser oscillation. With a cavity length of around 11 meters and an initial laser pulse of 10 ns, we have been able to isolate laser field images related to each round-trip pulse. Furthermore, by replacing the first mirror with a rough-surface target to simulate an uncooperative target and adding phase distortion elements to simulate atmospheric effects, we can observe the image status under such conditions.

Paper Details

Date Published: 15 February 2012
PDF: 6 pages
Proc. SPIE 8235, Solid State Lasers XXI: Technology and Devices, 823525 (15 February 2012); doi: 10.1117/12.906781
Show Author Affiliations
Frank F. Wu, MetroLaser, Inc. (United States)

Published in SPIE Proceedings Vol. 8235:
Solid State Lasers XXI: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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