Temperature compensated fiber-optic current sensor

摘要: In a fiber-optic current sensor, 22.5° Faraday rotator, which is part of the sensing fiber coil, determines working point sensor. The coil operated with substantially linearly polarized light or incoherent left and right circularly waves. one arrangement, polarization beam splitter generates two optical signals that vary in anti-phase changing current. A signal processor from signals. Appropriately detuned oriented half-wave quarter-wave retarders before are used to reduce cancel adverse effects temperature bend-induced birefringence on measurement signal. Moreover, may be derived difference bias processor.