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Applied Optics

Applied Optics


  • Vol. 11, Iss. 6 — Jun. 1, 1972
  • pp: 1360–1364

Light Source Responsible for the Deterioration of Cryptocyanine Q-Switches

Roberta A. Hollier and James D. Macomber  »View Author Affiliations

Applied Optics, Vol. 11, Issue 6, pp. 1360-1364 (1972)

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Ultraviolet radiation, in a band of wavelengths near 300 nm, produced by the flashlamps used to pump the ruby rod, is responsible for nearly all the photochemical decomposition (irreversible bleaching) of methanolic solutions of cryptocyanine used as passive shutters (Q-switches) in high-peak-power ruby lasers. The laser beam itself has little or no irreversible effect upon cryptocyanine.

© 1972 Optical Society of America

Original Manuscript: December 22, 1971
Published: June 1, 1972

Roberta A. Hollier and James D. Macomber, "Light Source Responsible for the Deterioration of Cryptocyanine Q-Switches," Appl. Opt. 11, 1360-1364 (1972)

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  1. R. A. Jeffreys, Ind. Chim. Belg, Suppl. 2, 495 (1959).
  2. B. H. Soffer, J. Appl. Phys. 35, 2551 (1964). [CrossRef]
  3. Private communication to one of us (J. D. M.) during the Fifth International Congress on Quantum Electronics (1969).
  4. R. M. Brown, R. J. Stone, Appl. Opt. 8, 2356 (1969). [CrossRef]
  5. B. L. Booth, Appl. Opt. 8, 2559 (1969). [CrossRef] [PubMed]
  6. Absorbanceis the logarithm to the base 10 of the reciprocal of the transmittance. It is to be distinguished from absorbtance, the fraction of the incident beam absorbed by the sample.
  7. It is likely that most of the temperature rise was actually produced by the conduction of heat from the air forced through the laser head to cool the ruby rod and flashlamps, the temperature of which is elevated above that of the room by the blower motor. This suggests even more strongly that ir radiation plays no more than a trivial part in the photochemical decomposition of the dye.

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