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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 ,
M. C. Ohmer ,
D. W. Fischer ,
N. C. Fernelius ,
M. O. Manasreh ,
P. G. Schunemann  and
T. M. Pollak
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
Information
MRS Online Proceedings Library (OPL) , Volume 325: Symposium L – Physics and Applications of Defects in Advanced Semiconductors , 1993 , 463
Copyright
Copyright © Materials Research Society 1994

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References

Refernces

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