Abstract

Photorefractive two-beam-coupling coefficients are measured and compared in thin and thick cerium-doped strontium barium niobate crystals fabricated from the same boule. For extraordinary polarization, the thin sample exhibits an intensity coupling coefficient as high as 45 cm−1, whereas the highest coefficient measured in the thick sample is only ~14 cm−1. The measured dependences of two-beam coupling on beam-crossing angle, pump–probe beam ratio, and wavelength are compared in these thin and thick crystals; also, comparisons are made in photorefractive response times and optical absorption. We infer that the measured coupling coefficients in the thin sample are more reliable, and we attribute the reduced coupling coefficients in the thick sample to beam fanning. Beam fanning is incorporated into a coupled-wave theory to predict the reduced coupling coefficients in the thick sample, along with the dependence of the coupling on the pump–probe beam ratio.

© 1991 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Charge-transport parameters of photorefractive strontium-barium niobate crystals doped with cerium

K. Buse, A. Gerwens, S. Wevering, and E. Krätzig
J. Opt. Soc. Am. B 15(6) 1674-1677 (1998)

Contradirectional two-beam coupling in absorptive photorefractive materials: application to Rh-doped strontium barium niobate (SBN: 60)

M. D. Ewbank, R. A. Vazquez, R. R. Neurgaonkar, and Frederick Vachss
J. Opt. Soc. Am. B 12(1) 87-98 (1995)

Diffraction properties of transmission photorefractive volume gratings in a cerium-doped potassium sodium strontium barium niobate crystal

Bao-Lai Liang, Zhao-Qi Wang, Guo-Guang Mu, Jiu-Hong Guan, and Colin M. Cartwright
Appl. Opt. 38(26) 5552-5555 (1999)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (27)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription