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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 11, Iss. 7 — Jul. 1, 1994
  • pp: 1211–1220

Photorefractive and optical properties of cerium-doped (SrCa)2NaNb5O15

Gary L. Wood and R. R. Neurgaonkar  »View Author Affiliations


JOSA B, Vol. 11, Issue 7, pp. 1211-1220 (1994)
http://dx.doi.org/10.1364/JOSAB.11.001211


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Abstract

The photorefractive effect is demonstrated in a single crystal of ferroelectric Ba-modified Ce-doped (SrCa)2NaNb5O15, for the first time to our knowledge. From two-beam coupling the gain and the time response were found. The maximum intensity gain with ordinary light at a 488-nm wavelength was Γ − 10 cm−1, while the photorefractive time response was determined to be 1.85 s at an incident intensity of I = 1W/cm2. The phase shift of the index gratings from the intensity grating was found to vary with angle from ~28° at a 79° crossing angle to 55° at a 13° crossing angle. The dark decay was measured, and the two-beam coupling intensity gain was found to oscillate with time. The oscillation period and the dc component were found to depend on the crossing angle. Beam fanning was observed with a transmitted beam reduction of 1.61 optical density and a time response of τ ~ 5.6 s at I = 230 mW/cm2. Finally, anisotropic conical diffraction was observed in the form of a partial ring pattern about the transmitted (extraordinary-polarized) incident beam in a direction opposite the beam fan. When the dependence of the angle between the ring and the transmitted beam is fitted to the change in the incident angle, it is possible to measure the birefringence, which was neno = −0.051.

© 1994 Optical Society of America

Citation
Gary L. Wood and R. R. Neurgaonkar, "Photorefractive and optical properties of cerium-doped (SrCa)2NaNb5O15," J. Opt. Soc. Am. B 11, 1211-1220 (1994)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-11-7-1211

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