Near-infrared photorefractivity in Cr-doped potassium sodium strontium barium niobate single crystal |
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| Authors: | J. Bergquist Y. Tomita M. Shibata |
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| Affiliation: | (1) Canon Inc., Research Centre, 5-1 Morinosato-Wakamiya, 243-01 Atsugi, Japan;(2) Present address: Electronics Engineering Dept., University of Electro-Communications, 1-5-1 Chofugaoko, Chofu, 182 Tokyo, Japan |
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| Abstract: | We report on the photorefractive properties of a Cr-doped (K1–xNax)2A–2 (SryBa1–y)2–ANb10O30 (x=0.586, y=0.659, A=1.12) single crystal in the near-infrared spectrum. The sample exhibits photorefractivity for wavelengths up to at least 840 nm where the steady-state two-beam coupling gain is found to be larger than 2 cm–1. Photorefractive gain and decay rate are measured as a function of wavelength, grating spacing and intensity. The wavelength dependence of gain fluctuations in two-beam coupling are also measured. |
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| Keywords: | 42.65 42.70 72.40 |
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