Light beam attenuation

Details Light beam attenuation Light beam attenuation

1991-03-07

1992-04-07

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372107, 372108, 372 99, H01S 313

Patent

active

051034549

ABSTRACT:
Variable attenuation of a light beam is achieved by mounting a rotatable multilayer dielectric attenuator in the beam. A first portion of the beam is transmitted through the attenuator and a second portion is reflected. Rotation of the attenuator about an axis transverse to the beam varies the ratio between these portions. The main application of this attenutator is to control an output characteristic, e.g. output power, of a laser, and may include a feedback loop to maintain this characteristic constant.

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McKee et al., "A High-Power Long Pulse Excimer Laser", IEEE Photonics Technology Letters, vol. 1, No. 3, Mar. 1989.

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