Demonstration of a 4-Sensor Folded Sangac Sensor Array with Active Phase Biasing Scheme |
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Authors: | Zhang-Qi Song Ming-Ye Yang Xue-Liang Zhang Yong-Ming Hu |
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Affiliation: | College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, 410073, China |
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Abstract: | A 4-sensor folded Sagnae sensor array with an active phase biasing scheme is presented. The overlapping of the signal and noise pulse is avoided through a time division multiplexing scheme and the noise pulses is eliminated almost completely. The scheme can address 16 sensors when the repeat frequency of input pulse is at 68.3 kHz. The alternative phase bias technique is demonstrated, which can provide sensors with stable phase bias. The future benefit of this technique is that the 1/f noise in the circuit can be suppressed. |
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Keywords: | Fiber optic sensor sensor array Sagnac interferometer time division multiplexing |
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