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给出了一种改进型的再入式集成光学光纤陀螺方案,在保持再入式集成光学光纤陀螺低成本、高温度稳定性、小型化特点的条件下,通过偏振转换集成光学多功能器件(TMIOC)的使用,有望消除光纤环多次再入的本征损耗,减小总光损耗,提高信噪比,并可实现无光放大器(SOA)的高灵敏度光纤陀螺系统。TMIOC器件的位相调制器部分(PM)采用退火质子交换波导(APE),实现天然的高偏振特性;PS是采用双模耦合方式实现的偏振模分离器,分离比达到20dB;PT是声光模转换器,实现TE和TM偏振模的相互转换,转换效率达到99%以上,声波功率小于20mW。目前的器件指标适合较长的光纤长度和较少的再入次数,满足高灵敏度光纤陀螺系统的要求;通过提高器件指标,如进一步提高响应速度,降低插入损耗,可实现较短的光纤长度和较多的再入次数的小型化、高灵敏度、低成本的第二代光纤陀螺系统的制作。
An improved reintegration optical fiber gyro (FOG) solution is presented. By keeping the characteristics of low cost, high temperature stability and miniaturization of reentrant integrated optical fiber gyro, TMIOC), it is expected to eliminate the intrinsic loss of multiple reentry of the fiber loop, reduce the total light loss, improve the signal-noise ratio, and realize a high-sensitivity fiber optic gyroscope system with a no-light amplifier (SOA). The TMIOC device’s phase modulator part (PM) uses an annealed proton exchange waveguide (APE) to achieve natural high polarization characteristics; PS is a polarization mode splitter using a dual-mode coupling method with a split ratio of 20dB; PT is an acousto-optic mode Converter, to achieve TE and TM polarization mode conversion, the conversion efficiency of more than 99%, the acoustic power is less than 20mW. The current device index for longer fiber length and fewer re-entry times to meet the requirements of high sensitivity fiber optic gyro system; by improving device specifications, such as to further improve the response speed and reduce the insertion loss, enabling shorter fiber length and More re-entry number of miniaturization, high sensitivity, low-cost second-generation fiber optic gyroscope system.