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2 September 1998 Laser amplifiers in optical displays and micromachining systems
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Proceedings Volume 3513, Microelectronic Structures and MEMS for Optical Processing IV; (1998) https://doi.org/10.1117/12.324265
Event: Micromachining and Microfabrication, 1998, Santa Clara, CA, United States
Abstract
One of the most difficult problems of large-screen projection displays and micromachining systems is overloading of a panel to be projected (for example a liquid crystal panel) with illuminating light. The problem can be solved by using, on the way from a panel to be projected to a screen or to an object to be treated, an optical amplifier with high enough amplification. The prospects of using laser amplifiers in these devices are discussed. Among all laser amplifiers the most suitable for this application are now pulsed metal vapor laser and metal halide laser amplifiers. They have rather high gain enabling amplification in the range from 102 to 104 and high average and peak output power sufficient to illuminate a large screen or to treat a material. The main characteristics of these amplifiers are described. The results of experimental investigations of projection systems with copper, copper bromide, gold and some other metal vapor amplifiers are reported. In all cases good quality amplified images were obtained. Average power at the output of amplifiers was under typical conditions of operation comparable with the output power of a laser with the same amplifying element. Measurements of contrast of amplified images showed that under normal conditions of operation it is close to the contrast of the input picture even at strong saturation of the amplifying medium. The influence of the amplifier saturation is briefly discussed. The results of experiments with TV projection systems using two types of liquid crystal spatial light modulators are presented and prospects of development of large-screen projection displays and systems for micromachining with laser light are discussed.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gueorgii G. Petrash, Vladimir V. Chvykov, and Konstantin I. Zemskov "Laser amplifiers in optical displays and micromachining systems", Proc. SPIE 3513, Microelectronic Structures and MEMS for Optical Processing IV, (2 September 1998); https://doi.org/10.1117/12.324265
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