China State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
Opt Lett. 2011 Apr 1;36(7):1158-60. doi: 10.1364/OL.36.001158.
In this Letter, an electro-optical probe configuration with polar molecule liquids as the sensing film is proposed to improve the voltage sensitivity. This method exhibited increases in intrinsic sensitivities better than 0.1 mV/√Hz, 2 orders of magnitude larger than the normal method using a GaAs probe in the same measurement system. Based on the mechanism of orientation polarization, the electro-optic coefficient was measured to be 250 pm/V by the Teng-Man method at a modulation field of 100 Hz. This technology will be promising in applications of low-frequency field detection.
在这封信中，提出了一种电光探头配置，其中以极性分子液体作为传感膜，以提高电压灵敏度。与在相同测量系统中使用 GaAs 探头的常规方法相比，该方法显示出固有灵敏度提高了 0.1 mV/√Hz 以上，提高了 2 个数量级。基于取向极化的机制，通过 Teng-Man 方法在 100 Hz 的调制场下测量电光系数为 250 pm/V。这项技术在低频场检测的应用中具有广阔的前景。
