Fine electronic type current transformer of full gloss

The utility model relates to an optical fiber sensing technical field, especially a fine electronic type current transformer of full gloss. This current transformer includes light source, coupler module, the polarizer, straight waveguide phase modulator, photoelectric detector and signal processing device, and coupler module is provided with reflection light -output end and reverberation test terminal, and reflection light -output end connects photoelectric detector, reverberation test terminal connection reverberation testing arrangement, the utility model discloses an it divide into the subtotal that is used for reverberation test with reflected light signal and is used for the measuring part to set up coupler module, when the phenomenon of no -output appears in photoelectric detector, under the prerequisite that does not change current structure, the accessible reverberation testing arrangement directly test, thereby judge whether trouble of photoelectric detector, active device's fault detection in -proce