Solid state vibrational lasers using F-center/molecular-defect p

Details Solid state vibrational lasers using F-center/molecular-defect p Solid state vibrational lasers using F-center/molecular-defect p

1985-10-03

1987-01-20

Scott, Jr., Leon

Coherent light generators

Particular active media

Insulating crystal

372 5, H01S 316

Patent

active

046384855

ABSTRACT:
Vibrational emission from molecular defects in ionic crystals can be realized by dilute diatomic molecular defects such as, e.g., CN.sup.- molecules in alkali halide crystals. After association of F-centers to the CN.sup.- molecules, forming a new F-center/molecular defect pair, the emission can be pumped by optical F-center excitation through electronic-vibrational coupling. Using this coupling mechanism, laser action in the near infrared wavelength region is obtained between vibrational energy levels of the molecules while pumping the F-center/molecule defect in the visible wavelength range. The laser crystals are prepared by additively coloring a CN.sup.- doped alkali halide crystal and exposing the colored crystal to light having a wavelength capable of being absorbed by the electronic F-center/molecule defect transition.

REFERENCES:
Panday et al., "Shift of Band Center of OH.sup.- and OD.sup.- Impurities in Alkali Halide Matrices", Phys Rev. B. vol. 4, No. 12, 15 Dec. 1971.
Schneider et al., "Broadly Tunable Laser Action Beyond 3 mm from (F.sub.2.sup.+), Centers in Lithium-Doped KI"; Opt. Lett. vol. 6, No. 12, Dec. '81.
Baev et al., "Application of Lasers Utilizing Color Centers in Alkali Halide Crystals to Intracavity Laser Spectroscopy", Sov. JQE 9(1) Jan. '79.
German, "Color Center Lasers", SPIE vol. 247, Advances in Laser Engineering & Application (1980).
Sterk et al., "Infrared Absorption of OH.sup.- Centers in Silver Chloride", Solid State Comm. vol. 9, pp. 1473, 1971.
Kirby et al., "Far-Infrared Prop. of Lattice Resonant Mode IV Parelectric Imp.", Phys. Rev. B vol. 2, No. 2, 15 July 1970.

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