Narrow-band optical absorption filter

Details Narrow-band optical absorption filter Narrow-band optical absorption filter

1981-04-09

1989-08-22

Arnold, Bruce Y.

350311, G02B 522

Patent

active

048590282

ABSTRACT:
A selected impurity in a crystal is provided as a narrow-band absorption filter for optical radiation. The crystal lattice constant may be adjusted, for example, by forming a mixed crystal, to adjust the absorption frequency.

REFERENCES:
patent: 3312759 (1967-04-01), Letter
patent: 3887485 (1975-06-01), Neuroth
patent: 3914516 (1975-10-01), Ritter
patent: 4101331 (1978-07-01), Anderson
patent: 4177321 (1979-12-01), Nishizawa
patent: 4247175 (1981-01-01), Saxe
Handbook of Optics, "Crystal with Color Centers and Doped Materials," Chpt. 8, p. 26.
V. V. Udod, "Absorbing Light Filters for the Visible and Infrared Regions of the Spectrum Based on Alkali Halide Crystals Colored by X Centers," Feb., 1969.
U.S. Goverment Report by Pacific-Sierra Research Corp., "Theoretical Study of Protection of Optical Systems From Pulsed-Laser Irradiation," Nov., 1980.
Ahrenkiel et al., "A New Saturable Absorber for the CO.sub.2 laser using Doped KCl", Jul., 1978.
Mirlin & Reshina, "Formation of Divalent Anion and Cation Impurity Complexes in KCl Crystals," Sep., 1967.
Smith et al., "Matrix Infrared Spectra and Anharmonic Force Field of NCO.sup.- * ", Sep., 1972.
See Attached List.

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