Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope
Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope
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DOI：
10.1109/jphot.2019.2908840
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发表时间：
2019-04
影响因子：
2.4
通讯作者：
Pei Li;Yulin Li;Fangyuan Chen;Chao Peng;Zhengbin Li
中科院分区：
文献类型：
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作者：
Pei Li;Yulin Li;Fangyuan Chen;Chao Peng;Zhengbin Li
由于双偏振干涉光纤陀螺仪（IFOGs）的偏振非互易误差通过光补偿被抵消，因此两个端口即互易端口和非互易端口都是可行的传感输出。在这项工作中，我们提出并演示了一种加权减法的噪声抑制方法，该方法同时利用部分相关的双端口信号。实验结果表明，相对强度噪声降至原值的56.2%，与理论分析一致；因此，角度随机游走被抑制<inline-formula>< text -math notation="LaTeX">${\text{5.7}}\;\times\；{\文本{10}}^{-{\文本{2}}}$ < / tex-math > < / inline-formula >, < inline-formula > < tex-math符号=“乳胶”> ${\文本{3.2}}\;\ \;{\文本{10}}^{-{{2 \保监会}}}/ \√{\ mathrm {h}} $ < / tex-math > < / inline-formula > 2-km-long纤维。实验验证了双偏振IFOG在短期和长期稳定性能上的改善，这使得双偏振IFOG具有广泛的应用前景。
Since the polarization non-reciprocity errors are canceled out through optical compensation in dual-polarization interferometric fiber-optic gyroscopes (IFOGs), two ports, namely, the reciprocal and nonreciprocal ports, are both feasible sensing output. In this work, we propose and demonstrate a weighted subtraction method for noise suppression that utilizes the partial correlated two-port signals simultaneously. The relative intensity noise has reduced to 56.2% of its original value in the experiment and agrees with the theoretical analysis; as a result, the angle random walk is suppressed from <inline-formula><tex-math notation="LaTeX">${\text{5.7}}\;\times\;{ \text{10}}^{-{\text{2}}}$</tex-math></inline-formula> to <inline-formula><tex-math notation="LaTeX">${\text{3.2}}\;\times\;{ \text{10}}^{-{{2\circ}}}/\sqrt{\mathrm{h}}$</tex-math></inline-formula> with a 2-km-long fiber. The improvement on short- and long-term stability performance has been experimentally verified, which makes dual-polarization IFOG configuration promising for many applications.