Loscoe C, Mette H
U.S. Army Electronics Command,Fort Monmouth, New Jersey, USA.
Appl Opt. 1966 Jan 1;5(1):93-6. doi: 10.1364/AO.5.000093.
A possible source of misalignment of light in an optical communication system, utilizing electrooptic modulators, is the deflection of the light beam within the modulator crystal due to temperature gradients. The present paper investigates the light deflection resulting from a linear temperature gradient across various modulator crystals. The total effect is found to be the sum of two contributions, one due to the crystal expansion, the other due to the index of refraction gradient, and is found to be smaller, by the factor 10, in quartz than in KDP. The experimental method described provides also a simple way of determining dn/dT in crystals for both ordinary and extraordinary rays.
在利用电光调制器的光通信系统中，光未对准的一个可能来源是由于温度梯度导致光束在调制器晶体内发生偏转。本文研究了各种调制器晶体上线性温度梯度引起的光偏转。结果发现，总的效应是由两个因素共同作用而成，一个是晶体膨胀，另一个是折射率梯度，并且发现该效应在石英中比在磷酸二氢钾（KDP）中小10倍。所描述的实验方法还提供了一种简单的方式来测定晶体中寻常光和非寻常光的dn/dT。
