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Proceedings Paper

Laser-beam diagnostics using fuzzy logic
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Paper Abstract

The measurement of laser beam quality is of prime importance for various applications. M2 factor has been widely accepted as a standard for characterizing the quality of real laser beams. The inaccuracies present in the specifications of resonator elements, variations occurring due to various competing physical processes inside the lasing medium, and offsets in the cavity configuration make the beam quality deviate from the desired value. Since the beam quality can be improved by manipulating the cavity parameters, fine tuning of mirror separation distance can offer considerable modification in the beam quality. In this paper, a fuzzy logic based controller to obtain and monitor desired laser beam characteristics for stable resonators is discussed. The simulation results indicate that the proposed fuzzy logic controller will dynamically adapt to real laser beams and can offer superior performance over conventional proportional-integral-derivative (PID) controllers. The principle advantage of the present approach is that it provides a versatile means for automatic control over the beam characteristics without relying on detailed mathematical modeling techniques.

Paper Details

Date Published: 5 July 1995
PDF: 10 pages
Proc. SPIE 2484, Signal Processing, Sensor Fusion, and Target Recognition IV, (5 July 1995); doi: 10.1117/12.213018
Show Author Affiliations
Narasimha S. Prasad, New Mexico State Univ. (United States)
Nadipuram R. Prasad, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 2484:
Signal Processing, Sensor Fusion, and Target Recognition IV
Ivan Kadar; Vibeke Libby, Editor(s)

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