[1] S R BALSAMO, S EZEKIEL. Passive ring resonator laser gyroscope. Applied Physics Letters, 30, 478-480(1977).

[2] G SAGNAC. L'éther lumineux démontré par l'effet du vent relatif d'éther dans un interféromètre en rotation uniforme. Comptes Rendus De L Academie Des Sciences, 157, 708-710(1913).

[3] H ARDITTY, H LEFÉVRE. Sagnac effect in fiber gyroscopes. Optics Letters, 6, 401-403(1981).

[4] V M N PASSARO, A CUCCOVILLO, L VAIANI et al. Gyroscope technology and applications: a review in the industrial perspective. Sensors, 17, 2284(2017).

[5] G A SANDERS, A TARANTA, C NARAYANAN et al. Hollow-core resonator fiber optic gyroscope using nodeless anti-resonant fiber. Optics Letters, 46, 46-49(2021).

[6] S EZEKIEL, BALSAMO . Passive ring resonator laser gyroscope. Applied Physics Letters, 30, 478-480(1977).

[7] W LIANG, V ILCHENKO, A SAVCHENKOV et al. Resonant microphotonic gyroscope. Optica, 4, 114-117(2017).

[8] S YIN, W LIU, Z PAN et al. Laser frequency combination tuning and locking technology in resonant optical gyro. Applied Physics B, 126, 70(2020).

[9] K SHANG, M LEI, H LI et al. Ultra-small interferometric fiber optic gyroscope with an integrated optical chip. Chinese Optics Letters, 20, 040601(2022).

[10] L YANG, S SHAO, J GENG et al. Sensitivity enhancement of micro-optical gyro with photonic crystal. Chinese Physics B, 30, 044208(2021).

[11] C FENG, D LI, P NI et al. Suppression of back-reflection from the end face of Si3N4 waveguide resonator. IEEE Access, 9, 28897-28903(2021).

[12] H MA, J ZHANG, L WANG et al. Resonant micro-optic gyro using a short and high-finesse fiber ring resonator. Optics Letters, 40, 5862-5865(2015).

[13] Fan WU, Jun LI, Shiqi LAN et al. Angle random walk improvement method of the SLD-light-source-driven resonant fiber optic gyroscope. Journal of Chinese Inertial Technology, 30, 359-364(2022).

[14] S SCHWARTZ, A RAVAILLE, G FEUGNET et al. Analysis of the design of a passive resonant miniature optical gyroscope based on integrated optics technologies. Optical Engineering, 56, 107109(2017).

[15] G A SANDERS, L K STRANDJORD, J WU et al. Development of compact resonator fiber optic gyroscopes, 168-170(2017).

[16] C ZHANG, W LIU, Y ZHENG et al. Resolution improvement for digital closed loop resonator micro-optic gyro based on tunable resonator. Optical Engineering, 57, 097102(2018).

[17] H MA, Y YAN, L WANG et al. Laser frequency noise induced error in resonant fiber optic gyro due to an intermodulation effect. Optics Express, 23, 25474-25486(2015).

[18] R DUAN, L FENG, H JIAO et al. Research on reducing the influence of laser frequency noise on resonator optical gyro. IEEE Sensors Journal, 17, 2422-2427(2017).

[19] G ZHANG, Z YU, Z XU et al. Laser frequency noise measurement in a resonant fiber optic gyro. Optik, 175, 296-303(2018).

[20] R ULRICH. Fiber-optic rotation sensing with low drift. Optics Letters, 5, 173-175(1980).

[21] Q W WANG, L S FENG, H LI et al. Enhanced differential detection technique for the resonator integrated optic gyro. Optics Letters, 43, 2941-2944(2018).

[22] K IWATSUKI, K HOTATE, M HIGASHIGUCHI. Effect of Rayleigh backscattering in an optical passive ring-resonator gyro. Applied Optics, 23, 3916(1984).

[23] T KAZUMASA. Calculation of Rayleigh backscattering noise in fiber-optic gyroscopes. Journal of the Optical Society of America, 2, 872-877(1985).

[24] M NAKAZAWA. Rayleigh backscattering theory for single-mode optical fibers. Journal of the Optical Society of America, 73, 1175-1180(1983).

[25] K HOTATE, K TAKIGUCHI, A HIROSE. Adjustment-free method to eliminate the noise induced by the backscattering in an optical passive ring-resonator gyro. IEEE Photonics Technology Letters, 2, 75-77(1990).

[26] K IWATSUKI, K HOTATE, M HIGASHIGUCHI. Kerr effect in an optical passive ring-resonator gyro. Journal of Lightwave Technology, 4, 645-651(1986).

[27] K TAKIGUCHI, K HOTATE. Partially digital-feedback scheme and evaluation of optical Kerr-effect induced bias in optical passive ring-resonator gyro. IEEE Photonics Technology Letters, 3, 679-681(1991).

[28] R A BERGH, H C LEFEVRE, H J SHAW. Compensation of the optical Kerr effect in fiber-optic gyroscopes. Optics Letters, 7, 282-284(1982).

[29] M TERREL, M DIGONNET, S FAN. Resonant fiber optic gyroscope using an air-core fiber. Journal of Lightwave Technology, 30, 931-937(2012).

[30] X XU, F TENG, C ZHANG et al. Investigation of polarization nonreciprocity in dual-interference fiber optical gyroscope. Optical Review, 21, 486-489(2014).

[32] Haotian LI, Wenyao LIU, Ziwen PAN et al. Suppression of backscattering noise in resonant micro optic gyroscope with two laser frequencies locking-in. Laser & Infrared, 49, 886-890(2019).

[33] H WANG, W LIU, Z PAN et al. Suppression of backscattering-induced noise in a resonator optic gyro by the dual-frequency modulation method. Optics Communications, 459, 124766(2020).

[34] D YING, H MA, Z JIN. Dynamic characteristics of R-FOG based on the triangle wave phase modulation technique. Optics Communications, 281, 5340-5343(2008).

[35] D YING, H MA, Z JIN. Resonator fiber optic gyro using the triangle wave phase modulation technique. Optics Communications, 281, 580-586(2008).

[36] K HOTATE, M HARUMOTO. Resonator fiber optic gyro using digital serrodyne modulation. Journal of Lightwave Technology, 15, 466-473(1997).

[37] Z JIN, G ZHANG, H MAO et al. Resonator micro optic gyro with double phase modulation technique using an FPGA-based digital processor. Optics Communications, 285, 645-649(2012).

[38] H MAO, H MA, Z JIN. Polarization maintaining silica waveguide resonator optic gyro using double phase modulation technique. Optics Express, 19, 4632-4643(2011).

[39] D YING, T XIE, Z WANG et al. A closed-loop RFOG based on digital serrodyne and sine modulations with two LiNbO3 phase modulators. Optics Communications, 452, 151-157(2019).

[40] D YING, T XIE, Z WANG et al. Modulation spectrum analysis and optimization for closed-loop RFOG under dynamic condition. Optics Communications, 466, 125659(2020).

[41] D YING, W WU, Q LI et al. On a closed-loop resonator fiber optic gyro(R-FOG) employing a semiconductor laser. Lasers in Engineering, 34, 117-126(2016).

[42] J WANG, L FENG, Q WANG et al. Suppression of backreflection error in resonator integrated optic gyro by the phase difference traversal method. Optics Letters, 41, 1586-1589(2016).

[43] J WANG, L FENG, Q WANG et al. Reduction of angle random walk by in-phase triangular phase modulation technique for resonator integrated optic gyro. Optics Express, 24, 5463-5468(2016).

[44] F GUO, R ZHAO, H LI et al. Modulator coefficient tracking method of resonant integrated optical gyroscope based on novel four-state modulation. Journal of Lightwave Technology, 40, 3016-3021(2022).

[45] D YING, Q LI, H MA et al. Residual intensity modulation in resonator fiber optic gyros with sinusoidal wave phase modulation. Journal of Zhejiang University-SCIENCE C, 15, 482-489(2014).

[46] C ZHANG, Z PAN, Y ZHENG et al. Suppression of residual intensity modulation noise in resonator integrated optic gyro. Optics Comunications, 430, 358-363(2019).

[47] L LIU, H LI, S LIU et al. Suppressing backscattering noise of a resonant fiber optic gyroscope using coherent detection. Applied Optics, 61, 4421-4428(2022).

[48] H LIU, W LIU, R ZHAO et al. Three closed loop noise suppression method for resonant micro optical gyroscope. Optics Communications, 533, 129285(2023).

[49] J WU, M SMICIKLAS, L K STRANDJORD et al. Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers, 9634, 169-172(2015).

[50] X LI, J ZHANG, H MA et al. Test and analysis of the optical Kerr-effect in resonant micro- optic gyros. IEEE Photonics Journal, 6, 1-7(2014).

[51] K SHANG, M LEI, Y FANG et al. Resonator fiber-optic gyro with intensity error suppression using a bias-sampling compensation technique. Applied Optics, 59, 3995-3999(2020).

[52] M LEI, L FENG, Y ZHI et al. Effect of intensity variation of laser in resonator integrated optic gyro. Applied Optics, 52, 4576-4581(2013).

[53] H MA, X LI, G ZHANG et al. Reduction of optical Kerr-effect induced error in a resonant micro-optic gyro by light-intensity feedback technique. Applied Optics, 53, 3465-3472(2014).

[54] S YIN, W LIU, E XING et al. Suppression of laser intensity fluctuation in resonator optical gyro by a simple light intensity feedback technique. Optical Engineering, 59, 036112(2020).

[55] D YING, K YE, Z WANG et al. A harmonic subtraction technique to suppress intensity modulation induced Kerr effect drift in a closed-loop RFOG. Optics Communications, 426, 562-569(2018).

[56] D YING, Z WANG, K YE et al. An open-loop RFOG based on 2nd/4th harmonic feedback technique to suppress phase modulation index's drift. Optics Communications, 426, 427-434(2018).

[57] H MA, Y YAN, Y CHEN et al. Improving long-term stability of a resonant micro-optic gyro by reducing polarization fluctuation. IEEE Photonics Journal, 4, 2372-2381(2012).

[58] Tianxiang GAO, Jun LI, Shiqi LAN et al. Study on polarization error of resonant fiber optical gyroscopes in varying temperature environments. Acta Optica Sinica, 43, 1906007(2023).

[59] X XU, F TENG, C ZHANG et al. Investigation of polarization nonreciprocity in dual-interference fiber optical gyroscope. Optical Review, 21, 486-489(2014).

[60] X WANG, Z HE, K HOTATE. Reduction of polarization-fluctuation induced drift in resonator fiber optic gyro by a resonator with twin 90° polarization-axis rotated splices. Optics Express, 18, 1677-1683(2010).

[61] H MA, X YU, Z JIN. Reduction of polarization-fluctuation induced drift in resonator fiber optic gyro by a resonator integrating in-line polarizers. Optics Letters, 37, 3342-3344(2012).

[62] C XIE, J TANG, D CUI et al. Resonant microsphere gyroscope based on a double Faraday rotator system. Optics Letters, 41, 4783-4786(2016).

[63] J ZHANG, H MA, H LI et al. Single-polarization fiber-pigtailed high-finesse silica waveguide ring resonator for a resonant micro-optic gyroscope. Optics Letters, 42, 3658-3661(2017).

[64] Qing SI, Zhe FENG, Changlong YU et al. Influence of laser linewidth on the slope of demodulation curve of fiber resonator. Journal of Chinese Inertial Technology, 28, 89-93(2020).

[65] G A SANDERS, L K STRANDJORD, W WILLIAMS et al. Improvements to signal processing and component miniaturization of compact resonator fiber optic gyroscopes(2018).

[66] J NIU, W LIU, Z PAN et al. The noise suppression in resonant micro optic gyroscopes based on dual light sources method. Optics Communications, 488, 126839(2021).

[67] J NIU, W LIU, Z PAN et al. Reducing backscattering and the Kerr noise in a resonant micro-optic gyro using two independent lasers. Applied Optics, 60, 2761-2766(2021).

[68] Wenyi WANG, Huiquan WANG, Yan CHEN et al. Double closed-Loop resonator micro optic gyro. Chinese Journal of Lasers, 39, 163-167(2012).

[69] H LI, L LIU, Z LIN et al. Double closed-loop control of integrated optical resonance gyroscope with mean-square exponential stability. Optics Express, 26, 1145-1160(2018).

[70] Z PAN, C ZHANG, C XIE et al. Resonator integrated optic gyro based on multilevel laser frequency lock-in technique. Chinese Optics Letters, 16, 040601(2018).

[71] J ZHU, W LIU, Z PAN et al. Combined frequency-locking technology of a digital integrated resonator optic gyroscope with a phase-modulated feedback loop. Applied Optics, 58, 9914-9920(2019).

[72] J LIANG, L YANG, Z LIU et al. Compensation for the asymmetry error of resonant optical gyroscope via second harmonic demodulation curves. Optics Communications, 520, 128423(2022).

[73] Y TAO, W Y LIU, NAN C et al. Dual closed-loop control method for resonant integrated optic gyroscopes with combination differential modulation. Optics Communications, 556, 130264(2024).

[74] J GENG, L YANG, Y ZHANG. Resonant optical gyroscope based on all-optical frequency locking. IEEE Transactions on Instrumentation and Measurement, 71, 7004204(2022).

[75] Zhongcheng TIAN. Impact of relative intensity noise to the performance of microwave photonic links. Semiconductor Optoelectronics, 37, 911-916(2016).

[76] Xianghong LIU, Rui ZHANG, Xiaocheng TIAN et al. Progress of intensity noise suppression technology of single longitudinal mode laser. Laser＆Optoelectronics Progress, 60, 2300006(2023).

[77] X KUAI, L WEI, F YANG et al. Suppression method of optical noises in resonator-integrated optic gyroscopes. Sensors, 22, 2889(2022).

[78] X YI, X WEN. Y-integrated optic chip (Y-IOC) applied in fiber optic gyro, 6344, 63440U(2006).

[79] D DEPPE, G DORNER, S KÖNIG et al. MEMS and FOG technologies for tactical and navigation grade inertial sensors—recent improvements and Comparison. Sensors, 17, 567(2017).

[80] K SHANG, M LEI, Q XIANG et al. Near-navigation-grade interferometric fiber optic gyroscope with an integrated optical chip. Chinese Optics Letters, 18, 120601(2020).

[81] T ZHANG, G QIAN, Y WANG et al. Integrated optical gyroscope using active Long-range surface plasmon-polariton waveguide resonator. Scientific Reports, 4, 3855(2014).

[82] P PARHAM, D ALEXANDER, ALI H . Nanophotonic optical gyroscope with reciprocal sensitivity enhancement. Nature Photonics, 12, 671-675(2018).

[83] Z LI, Y ZHANG, J WANG et al. A survey of FPGA design for AI era. Journal of Semiconductors, 41, 021402(2020).

[84] C LUO, M K SIT, H FAN et al. Towards efficient deep neural network training by FPGA-based batch-level parallelism. Journal of Semiconductors, 41, 022403(2020).

[85] H MA, W WANG, Y REN et al. Low-noise low-delay digital signal processor for resonant micro optic gyro. IEEE Photonics Technology Letters, 25, 198-201(2012).

[86] N LIU, Z SU, Q LI et al. A combined CKF-PSR method for random noise compensation of vibratory gyroscopes. Journal of Industrial Information Integration, 25, 100241(2022).

[87] Y LI, B XI, S REN et al. Precision enhancement by compensation of hemispherical resonator gyroscope dynamic output errors. IEEE Transactions on Instrumentation and Measurement, 72, 1-10(2023).

[88] Jingtao YAN, Hua ZHONG, Yishi LIU et al. Analysis for effect of laser linewidth on performance of interferometric fiber optic gyroscope. Journal of Chinese Inertial Technology, 30, 365-371(2022).

[89] J HU, S LIU, L LIU et al. Closed-loop resonant fiber-optic gyroscope with a broadband light source. Journal of Lightwave Technology, 41, 6088-6093(2023).

[90] S ZHAO, Q LIU, Y LIU et al. Navigation-grade resonant fiber-optic gyroscope using ultra-simple white-light multibeam interferometry. Photonics Research, 1, 542-549(2022).

[91] Huilian MA, Huiqiang BAO, Zhonghe JIN. Backscattering in a silica optical waveguide ring resonator. Chinese Journal of Lasers, 37, 105-109(2010).

[92] Y TAO, W LIU, S WANG et al. Ultra-stable control near the EP in non-Hermitian systems and high-precision angular rate sensing applications. Optics Express, 32, 79-91(2024).

[93] S X WANG, W Y LIU, T YU et al. A novel highly sensitive angular rate sensor employing anti-parity-time symmetry. Journal of Lightwave Technology, 42, 3884-3890(2024).

[94] W CHEN, Ş KAYA ÖZDEMIR, G ZHAO et al. Exceptional points enhance sensing in an optical microcavity. Nature, 548, 192-196(2017).

[95] H WANG, Y H LAI, Z YUAN et al. Petermann-factor sensitivity limit near an exceptional point in a Brillouin ring laser gyroscope. Nature Communications, 11, 1-6(2020).

[96] J WIERSIG. Review of exceptional point-based sensors. Photonics Research, 8, 1457-1467(2020).