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首页> 外文期刊>Applied Physics Letters >Wavelength and temperature dependence of photorefractive effect in quasi-phase-matched LiNbO_3 waveguides
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Wavelength and temperature dependence of photorefractive effect in quasi-phase-matched LiNbO_3 waveguides

机译：准相位匹配的LiNbO_3波导中光折变效应的波长和温度依赖性

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摘要

The photorefractive effect (PRE) in quasi-phase-matched LiNbO_3 waveguides is studied systematically by employing the pump-probe technique. It is found that the PRE is gradually eased with an increase of the device operation temperature. With increasing light irradiation power, the PRE becomes severe, the buildup (relaxation) time constant decreases (increases), while the second harmonic generation (SHG) efficiency is enhanced for the devices used in studies. The PRE under a shorter wavelength (980 nm) light irradiation is much stronger than that at a longer wavelength one (1550 nm), and the PRE for the latter is mainly caused by the SHG of the pump.
机译：利用泵浦探针技术系统地研究了准相位匹配的LiNbO_3波导中的光折变效应（PRE）。可以发现，随着器件工作温度的升高，PRE逐渐降低。随着光辐照功率的增加，PRE变得很严重，堆积（松弛）时间常数减少（增加），而研究中使用的设备的二次谐波产生（SHG）效率则提高了。较短波长（980 nm）的光照射下的PRE比较长波长（1550 nm）下的PRE强得多，后者的PRE主要是由泵的SHG引起的。

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