Abstract

A rejection filter against stray ruby laser light in scattering experiments is described. It consists of an array of sixty-four ruby crystal cubes with a doping of up to 2.3 wt. % of chromium oxide. The filter is 15 mm thick. Suppression factors of more than 10⁶ are achieved with individual cubes (5 × 5 × 15 mm³), the effective overall suppression of the assembled array being 10⁴. The filter facilitates Raman calibration of the lidar Thomson scattering system of the JET tokamak.

© 1988 Optical Society of America

Ruby filter for stray light reduction in scattering experiments

D. H. McNeill
Appl. Opt. 15(3) 573-574 (1976)

The Effects of Scattering and Mirror Reflectivity on the Performance of a Ruby Laser

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Stray-light suppression with high-collection efficiency in laser light-scattering experiments

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