Current sensor based on magneto-optic nonreciprocal MZ interference structure
A technology of current sensor and interference structure, applied in the measurement of current/voltage, instrument, measurement of electrical variables, etc., can solve the problem of multi-parameter mutual interference, and achieve the effect of structural parameter optimization, high sensitivity and strong functionality
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[0018] Such as figure 1 As shown, the present invention includes a beam splitter 1, two optical fiber interference arms 2 containing magneto-optical materials, and a beam combiner 3: the beam splitter 1 divides the input light field equally to two optical fiber interference arms 2A containing magneto-optical materials , the input end of 2B, the optical field transmitted in the two optical fiber interference arms 2A, 2B containing magneto-optical materials has different phase shift delays due to the magneto-optical effect, and the two optical fiber interference arms 2A, 2B containing magneto-optical materials The output terminal of is connected with beam combiner 5, and interference occurs. The phase difference caused by the two optical fiber interference arms can be obtained by measuring the intensity of the interference light field. The phase difference generated when the light propagates in the two optical fiber interference arms is only related to the measured current that...
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