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CDY-DG53-1型光纤电压计是利用Bi_(12)GeO_(20)单晶的电光效应和光纤的导光原理研制而成并用先进的微机技术进行数据处理的一种完全新型的电压测量仪器。它的研制成功实现了用“光”来测定电压的新技术。该机的工作原理是:激光器发出的光经过光纤送入传感探头,通过偏振器产生线偏振光,线偏振光通过电光晶体,当电场为零时,由于晶体的各向同性,不产生相位差;当施加电场,晶体变为各向异性,产生相位差。相位差δ与外界电场E关系为:
CDY-DG53-1-type optical fiber voltmeter is the use of Bi_ (12) GeO_ (20) single crystal electro-optical effect and optical fiber developed by the principle of light and advanced computer technology for data processing a completely new type of voltage measuring instruments . Its successful development of the new technology of “light” to determine the voltage. The working principle of the machine is that the light emitted by the laser is sent to the sensing probe through the optical fiber to generate linearly polarized light through the polarizer and the linearly polarized light to pass through the electro-optic crystal. When the electric field is zero, the phase is not generated due to the isotropy of the crystal Poor; When an electric field is applied, the crystal becomes anisotropic, resulting in a phase difference. The phase difference δ is related to the external electric field E as