Influence of Imperfect Faraday Rotation Mirror on All-Fiber Optic Current Sensor

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Name</td><td class="align_center">Brand</td><td class="align_center">Model or main parameters</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Light source</td><td class="align_center">Thorlabs China Co., Ltd.</td><td class="align_center">S5FC1018P</td></tr><tr><td class="align_left">Polarizer</td><td class="align_center">MC Fiber Optics Co., Ltd.</td><td class="align_center">The extinction ratio is no less than 28 dB</td></tr><tr><td class="align_left">Circulator</td><td class="align_center">MC Fiber Optics Co., Ltd.</td><td class="align_center">Commercially available</td></tr><tr><td class="align_left">Phase modulator</td><td class="align_center">SWT OPTICS Co., Ltd.</td><td class="align_center">The half-wave voltage is 4 V</td></tr><tr><td class="align_left">Polarization-maintaining fiber</td><td class="align_center">YOFC Optical Fiber and Cable Co., Ltd.</td><td class="align_center">PM1016-A</td></tr><tr><td class="align_left">Faraday rotation mirror</td><td class="align_center">MC Fiber Optics Co., Ltd.</td><td class="align_center">Reflectivity is greater than 99%@1310 nm</td></tr><tr><td class="align_left">Photodetector</td><td class="align_center">Conquer Co., Ltd.</td><td class="align_center">KG-HSP</td></tr><tr><td class="align_left">Lock-in amplifier</td><td class="align_center">Zurich Instruments</td><td class="align_center">MFLI 500 kHz</td></tr><tr><td class="align_left">Signal generator</td><td class="align_center">Tektronix</td><td class="align_center">AFG1062</td></tr><tr><td class="align_left">Vacuum high- and low-temperature test box</td><td class="align_center">Wuhan Tailunte Century Technology Co., Ltd.</td><td class="align_center">TLVB-VHLB50, range: -60°C-100°C, <svg height="14.2001pt" id="M88" style="vertical-align:-3.4034pt" version="1.1" 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175Z"></path></g></svg></td></tr><tr><td class="align_left">DC-regulated power supply</td><td class="align_center">Rohde &amp; Schwarz, Munich, Germany</td><td class="align_center">R&amp;S®HMP4000</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Device model and main parameters.</div>

Journal of Sensors

tab1

Table 1

Table 1: Influence of Imperfect Faraday Rotation Mirror on All-Fiber Optic Current Sensor 