用于RFOG的光学锁相环仿真研究
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摘要
谐振式光纤陀螺是实现光纤陀螺小型化发展的重要方向,具有广阔的应用背景和很好的应用前景。而激光器作为谐振式光纤陀螺的关键设备之一,其性能直接影响着谐振式光纤陀螺的精度。为了解决谐振式光学陀螺的背反噪声问题,采用光学锁相环技术对激光器频率进行锁定的方案,通过对光学锁相环进行建模、仿真分析,重点研究了锁相原理及锁相方案,验证了基于电流调制的半导体激光器的光学锁相环可行性。最终验证了光学锁相环的相位锁定效果,实现了两激光器输出频率差值稳定的设计目标。
Based on the optical Sagnac principle,RFOG has great potentialities of miniaturization,becoming the most competitive gyroscope in future. Laser as the most important optical equipment in RFOG system,it has an significant impact on RFOG' s output accuracy. A versatile,inexpensive and simple optical phase lock loop(OPLL) for applications in RFOG experiment is presented. This paper analysed the principle of phase lock and proved it by simulation. Finally,two separate semiconductor lasers' phase lock phenomenon is verified,it achieved the goal of keeping solid frequency differences.
Based on the optical Sagnac principle,RFOG has great potentialities of miniaturization,becoming the most competitive gyroscope in future. Laser as the most important optical equipment in RFOG system,it has an significant impact on RFOG' s output accuracy. A versatile,inexpensive and simple optical phase lock loop(OPLL) for applications in RFOG experiment is presented. This paper analysed the principle of phase lock and proved it by simulation. Finally,two separate semiconductor lasers' phase lock phenomenon is verified,it achieved the goal of keeping solid frequency differences.
引文
[1]郅银周.谐振式光纤陀螺闭环检测技术研究[D].北京ZHI Yin-zhou.Close-loop dection technology for resonator fiber optical gyro[D].Beijing University of Aeronautics and Astronautics,2015.
[2]马迎建,宋彭,武学英.外腔半导体激光器在谐振式光学陀螺中的应用研究[J].传感器与微系统,2011,30(4):51-53+56.MA Ying-jian,SONG Peng,WU Xue-ying.Application research of external cavity semiconductor laser in resonant optical gyroscope[J].Transducer and Microsystem Technologies,2011,30(4):51-53+56.
[3]Sanders G A,Rouse G F,Strandjord L K,et al.Resonator fiber-optic gyro using Li Nb O3integrated optics at 1.5-μm wavelength[C].OE/Fiber LASE88,International Society for Optics and Photonics,1989:202-210.
[4]Takiguchi K,Hotate K.Partially digital-feedback scheme and evaluation of optical Kerr-effect induced bias in optical passive ring-resonator gyro[J].IEEE PhotonicsTechnology Letters,1991,3(7):679-681.
[5]Wu J,Smiciklas M,Strandjord L K,et al.Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers[C].International Conference on Optical Fiber Sensors(OFS24),International Society for Optics and Photonics,2015:96341O-96341O-4.
[6]丁之.光锁相环环路设计与仿真研究[D].电子科技大学,2011.DING Zhi.Research on OPLL design and simulation[D].University of Electronic Science and Technology of China,2011.
[7]Gardner F M.锁相环技术[M].北京:人民邮电出版社,2007.Gardner F M.Phaselock technology[M].Beijing:Peoples Posts and Telecommunications Press,2007.
[2]马迎建,宋彭,武学英.外腔半导体激光器在谐振式光学陀螺中的应用研究[J].传感器与微系统,2011,30(4):51-53+56.MA Ying-jian,SONG Peng,WU Xue-ying.Application research of external cavity semiconductor laser in resonant optical gyroscope[J].Transducer and Microsystem Technologies,2011,30(4):51-53+56.
[3]Sanders G A,Rouse G F,Strandjord L K,et al.Resonator fiber-optic gyro using Li Nb O3integrated optics at 1.5-μm wavelength[C].OE/Fiber LASE88,International Society for Optics and Photonics,1989:202-210.
[4]Takiguchi K,Hotate K.Partially digital-feedback scheme and evaluation of optical Kerr-effect induced bias in optical passive ring-resonator gyro[J].IEEE PhotonicsTechnology Letters,1991,3(7):679-681.
[5]Wu J,Smiciklas M,Strandjord L K,et al.Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers[C].International Conference on Optical Fiber Sensors(OFS24),International Society for Optics and Photonics,2015:96341O-96341O-4.
[6]丁之.光锁相环环路设计与仿真研究[D].电子科技大学,2011.DING Zhi.Research on OPLL design and simulation[D].University of Electronic Science and Technology of China,2011.
[7]Gardner F M.锁相环技术[M].北京:人民邮电出版社,2007.Gardner F M.Phaselock technology[M].Beijing:Peoples Posts and Telecommunications Press,2007.