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Temperature and Polarization Dependence of the Optical Absorption in ZnGeP2 at two Micrometers

Published online by Cambridge University Press:  22 February 2011

M. Shah
Affiliation:
Wright Laboratory, WPAFB, OH 45433-7707
M. C. Ohmer
Affiliation:
Wright Laboratory, WPAFB, OH 45433-7707
D. W. Fischer
Affiliation:
Wright Laboratory, WPAFB, OH 45433-7707
N. C. Fernelius
Affiliation:
Wright Laboratory, WPAFB, OH 45433-7707
M. O. Manasreh
Affiliation:
Wright Laboratory, WPAFB, OH 45433-7707
P. G. Schunemann
Affiliation:
Lockheed Sanders, Nashua, NH 03061-2035
T. M. Pollak
Affiliation:
Lockheed Sanders, Nashua, NH 03061-2035
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Abstract

The temperature and polarization dependence of the optical absorption in ZnGeP2 at two micrometers is reported for the first time over the temperature range from 10K to 300K. The radiation was normally incident upon the face of a cubic sample which contained the c-axis. The absorption of o-rays (E parallel to c), and erays (E perpendicular to c) was determined. It was found that the e-ray absorption coefficient was always significantly larger than the o-ray absorption coefficient and that it had a less significant temperature dependence. For example, the ratio of e-ray to o-ray absorption coefficient was approximately two at 300K and five at 77K. Correspondingly the o-ray absorption coefficients were reduced upon cooling to 77K by a factor of 2.5, while the e-ray absorption coefficients were reduced only slightly (10%-20%). These results indicate that for Type I optical parametric oscillators (OPOs) which use an oray pump beam, that performance may be improved by cooling the crystal.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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References

1. Budni, P. A., Schunemann, P. G., Knight, M. G., Pollak, T. M., and Chicklis, E. P., OSA Proceedings on Advanced Solid State Lasers, Chase, Lloyd and Pinto, Albert, eds. OSA, DC, 13, 380 (1992).Google Scholar
2. Catella, G. C. et al. , Appl. Opt. 32, 3948 (1993).CrossRefGoogle Scholar
3. Gorban, I. S., Gorynya, V. A., Lugovskii, V. V., and Tychina, I. I., Sov. Phys. Solid State, 16,1029 (1974).Google Scholar
4. Tregub, I. G., Ukrainskiy Fizicheskiy Zhurnal, 25, 1209 (1980).Google Scholar
5. Schunemann, P. G., and Pollak, T. M., OSA Proceedings on Advanced Solid State Lasers, Dube, George and Chase, Lloyd, eds. 10, 332 (1991).Google Scholar
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Temperature and Polarization Dependence of the Optical Absorption in ZnGeP2 at two Micrometers
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