Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope
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 wei...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8680004/ |
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| Summary: | 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. |
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| ISSN: | 1943-0655 |