谐振式光纤陀螺仪及窄线宽光纤激光器研究
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摘要
谐振式光纤陀螺是一种基于Sagnac效应的高精度惯性传感器。它以光纤环形谐振腔作为核心敏感部件,把Sagnac效应反映到谐振频率的变化上,其检测精度高,动态范围大,所需要的光纤长度短,容易集成,特别适合用于通信及军事导航等领域。
窄线宽光纤激光器是作为一种特殊的光纤激光器,具有线宽窄、噪声低、抗电磁干扰、体积小等特点,在光纤传感、激光倍频、光谱测量等领域有广泛应用。
本论文通过理论分析和计算机模拟仿真相结合的方法,对谐振式光纤陀螺及窄线宽光纤激光器的工作原理、器件结构及特性进行了研究,提出了谐振式光纤陀螺的数字闭坏方案和一种新型的窄线宽光纤激光器结构。主要工作包括以下几个方面:
1.对谐振式光纤陀螺的谐振特性及谐振参数进行Matlab仿真,研究了谐振式光纤陀螺的测量原理;得出了谐振式光纤陀螺系统中测量精度与光纤长度、耦合损耗和耦合系数间存在一个最佳匹配条件的结论。
2.提出了一种谐振式光纤陀螺的数字闭环方案。该结构具有全光纤化、易于实现和性能价格比高等特点。
3.推导了激光器的斜率效率、泵浦阈值和激光输出功率的表达式,并进行了模拟仿真,得出在特定波长范围内窄线宽掺铒光纤激光器存在一个最短光纤长度的结论。
4.提出一种窄线宽光纤激光器结构。该结构采用980nm半导体激光器双向泵浦,利用光纤光栅法布罩.珀罗腔选频和反馈调节相结合的方法,获得窄线宽激光输出。该激光器具有泵浦效率高、低噪声及稳定性好等特点。
Resonator fiber optic gyroscope (R-FOG) is a kind of high precision inertial sensor based on Sagnac effect. It uses a fiber ring resonator as a core sensing part. It can reflect Sagnac effect to the shift of resonant frequency and has the characteristics of high precision, large measure range, smart structure and easily integrated. It is adapted to use in communication and military navigation.
As a kind of special fiber optic laser, narrow line-width fiber laser (NLWFL) has the characteristics of narrow linewidth, low noise, anti-electromagnetic disturb and smart structure, etc. It will be widely used in fiber sensing, laser frequency doubling, spectral measurement, and so on.
In this thesis the work principle, component structure and characteristics of R-FOG and NLWFL are studied with theoretical analysis and computer simulation method. And a kind of digital closed-loop scheme of R-FOG and a new NLWFL structure are proposed. The main works includes the following aspects:
1. The resonant characteristics and parameters of R-FOG are simulated by Matlab. Measurement principle of R-FOG is studied. The conclusion is obtained that there is an optimal matching condition between measure precision and fiber length, coupling loss, coupling coefficient.
2. A kind of digital closed-loop scheme of R-FOG is proposed. It has the characteristics of all-fiber, easily realized and high cost performance.
3. The expressions of laser slope efficiency, threshold pump and laser output power are deduced and simulated. The conclusion is obtained that there is an optimal fiber length in particular wavelength range.
4. A kind of NLWFL structure is proposed. This structure use double 980nm laser diodes as its pump sources. Narrow line width laser is obtained by using fiber Bragg grating F-P frequency selection and feedback modulation method. This laser has the characteristics of high pump efficiency, low noise and better stability, etc.
窄线宽光纤激光器是作为一种特殊的光纤激光器,具有线宽窄、噪声低、抗电磁干扰、体积小等特点,在光纤传感、激光倍频、光谱测量等领域有广泛应用。
本论文通过理论分析和计算机模拟仿真相结合的方法,对谐振式光纤陀螺及窄线宽光纤激光器的工作原理、器件结构及特性进行了研究,提出了谐振式光纤陀螺的数字闭坏方案和一种新型的窄线宽光纤激光器结构。主要工作包括以下几个方面:
1.对谐振式光纤陀螺的谐振特性及谐振参数进行Matlab仿真,研究了谐振式光纤陀螺的测量原理;得出了谐振式光纤陀螺系统中测量精度与光纤长度、耦合损耗和耦合系数间存在一个最佳匹配条件的结论。
2.提出了一种谐振式光纤陀螺的数字闭环方案。该结构具有全光纤化、易于实现和性能价格比高等特点。
3.推导了激光器的斜率效率、泵浦阈值和激光输出功率的表达式,并进行了模拟仿真,得出在特定波长范围内窄线宽掺铒光纤激光器存在一个最短光纤长度的结论。
4.提出一种窄线宽光纤激光器结构。该结构采用980nm半导体激光器双向泵浦,利用光纤光栅法布罩.珀罗腔选频和反馈调节相结合的方法,获得窄线宽激光输出。该激光器具有泵浦效率高、低噪声及稳定性好等特点。
Resonator fiber optic gyroscope (R-FOG) is a kind of high precision inertial sensor based on Sagnac effect. It uses a fiber ring resonator as a core sensing part. It can reflect Sagnac effect to the shift of resonant frequency and has the characteristics of high precision, large measure range, smart structure and easily integrated. It is adapted to use in communication and military navigation.
As a kind of special fiber optic laser, narrow line-width fiber laser (NLWFL) has the characteristics of narrow linewidth, low noise, anti-electromagnetic disturb and smart structure, etc. It will be widely used in fiber sensing, laser frequency doubling, spectral measurement, and so on.
In this thesis the work principle, component structure and characteristics of R-FOG and NLWFL are studied with theoretical analysis and computer simulation method. And a kind of digital closed-loop scheme of R-FOG and a new NLWFL structure are proposed. The main works includes the following aspects:
1. The resonant characteristics and parameters of R-FOG are simulated by Matlab. Measurement principle of R-FOG is studied. The conclusion is obtained that there is an optimal matching condition between measure precision and fiber length, coupling loss, coupling coefficient.
2. A kind of digital closed-loop scheme of R-FOG is proposed. It has the characteristics of all-fiber, easily realized and high cost performance.
3. The expressions of laser slope efficiency, threshold pump and laser output power are deduced and simulated. The conclusion is obtained that there is an optimal fiber length in particular wavelength range.
4. A kind of NLWFL structure is proposed. This structure use double 980nm laser diodes as its pump sources. Narrow line width laser is obtained by using fiber Bragg grating F-P frequency selection and feedback modulation method. This laser has the characteristics of high pump efficiency, low noise and better stability, etc.
引文
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26.潘玉恒,鲁标,孟克.闭环光纤陀螺数字信号处理的设计方案[J].应用科技,2005,32(2):213-217
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32.K.Kalli,D.A.Jaekson.Analysis of the dynamic response of a ring resonator to a time -varying input signal[J].Optics Letters,1993,18(6):465-467
33.A.R.Marvern.Progress towards fiber optic gyro production[J].SPIE,1991,1585(2):48-64
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37.马立宁,乐光新,詹菲编著.MATLAB与通信仿真[M].北京:人民邮电出版社,2000
38.Y.Lai and I.Bennion.Wavelength-switchable DBR fibre laser with high spectral purity output[J],IEEE Elec.Elett.,2006,42(1):458-462
39.叶建波,掌蕴东,邱巍.掺铒光纤中浓度效应对光脉冲群速的影响[J].中国激光,2008,35(4):563-564
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2.王洪志,王彦国.新一代陀螺发展及应用分析[J].光学仪器,2003,26:49-51
3.Dwayne W H.Improved affordability of high precision submarine inertial navigation by insertion of rapidly developing fiber optic gyro technology[J].IEEE,2000:404-410
4.杨培根,龚智柄,等.光电惯性技术[M].北京:兵器工业出版社,1999
5.Arditty,H.J etc.,Sagnac effect in fiber gyroscope[J].Optics Letters,1981,6:401-403
6.刘思科,陈明.光纤陀螺建模及误差特性研究[D].西安:西北工业大学,2007
7.吴军伟,郝燕玲.光纤陀螺数字信号系统研究与实现[D].哈尔滨:哈尔滨工程大学,2005
8.Herve Lefevre.The Fiber-Optic Gyroscope[M].Artech House:Bostong.Lonton.1993:24-53
9.陈淑芬,李伟明,张明等.30Hz单模超窄线宽光纤激光器[J].北京理工大学学报,2006,26(8):722-724
10.俞本立,钱景仁.窄线宽激光的零拍测量法[J].中国激光,2001,28(4):351-354.
11.毛红敏,甑胜来,朱军等.一种低噪声窄线宽光纤激光器[J].安徽大学学报,2005,29(5):33-35
12.张仁杰.单频单偏振窄线宽光纤激光器[D].安徽:安徽大学,2007
13.D.M.Baney,P.B.Gallion.Power spectrum measurement of a modulated semiconductor laser using an interferometric self-homodyne technique:influence of quantum phase noise and field correlation[J].IEEE J.Quantum Electron.,1989,25(10):2106-2112
14.Meng-Zhou,Stewart George,Whitenett Gillian.Stable single-mode operation of a narrow-linewidth,linearly polarized,Erbium fiber ring laser using a saturable absorber[J].Lightwave Technol.,2006,24(5):2179-2183
15.张春安.国外光纤陀螺技术发展与应用现状[J].光纤通信,2002,24(1):24-28
16.E.Snitzer.Proposed fiber cavities for optical laser[J].Appl.Phys.,1961,32:36-39
17.盛钟延,季杭峰,周柯江.光纤陀螺的最新进展[J].红外与激光工程,1999,28(3):59-63
18.曾桂林.光纤陀螺技术发展及军需分析[J].应用光学,2001,22(1):1-4
19.胡卫东.光纤陀螺发展综述[J].红外技术,2001,23(5):29-33
20.叶震寰,楼棋洪,薛东.窄线宽光纤激光器进展[J].光学与光电技术,2004,2(1):1-4
21.J.L.Zyskind,V.Mizrahi,D.J.Digiovanni,etal.Short single frequency Erbium-doped fiber laser[J].Electronics Letters,1992,28(15):1385-1387
22.C.J.Koester,E.Snitzer.Amplification in a fiber laser[J].Appl.Opt.,1964,3:1182-1186
23.C.Mclntosh,A.Yeniay,J.Toulouse..Stimulated brillouin scattering in dispersion compensating fibers[J].Optical Fiber Tech.,1997,12(3):173-176
24.LEFEVRE H C.The Fiber Optic Gyroscope[M].Translated by ZHANG Guicai,WANG Wei.Beijing:National Defense Industry Press,2002:45-57
25.沈庆,金仲和,马慧莲.谐振式光纤陀螺数字系统设计[D].杭州:浙江大学,2006
26.潘玉恒,鲁标,孟克.闭环光纤陀螺数字信号处理的设计方案[J].应用科技,2005,32(2):213-217
27.Tohru Imai,Ken-ichi Nishide,Hideo Ochi,Motoichi Ohtsu.The passive ring resonator fiber optic gyro using modulatable highly coherent laser diode module[J].15~(th) Anniversary Conference,1991,1585(23):153-162
28.汤全安,马新宇.谐振式光纤陀螺中环形谐振腔的实验研究[J].红外与激光工程,1998,27(4):34-35
29.刘仲恒,刘永志.光纤陀螺及其数字信号处理[D].成都:电子科技大学,200l
30.姚琼,胡永明,谢元平等.谐振型光纤陀螺方波频率调制方法研究[J].光学技术,2005,31(4):503-505
31.R.Arvind,S.S.Pathak,T.K.Alex,P.R.Venkateswaran.Digital dual ramp phase modulator for fiber optic gyroscope[J].Computers and Engineering,1999,25(3):17-27
32.K.Kalli,D.A.Jaekson.Analysis of the dynamic response of a ring resonator to a time -varying input signal[J].Optics Letters,1993,18(6):465-467
33.A.R.Marvern.Progress towards fiber optic gyro production[J].SPIE,1991,1585(2):48-64
34.陈淑芬.朱永等,集成光学光纤陀螺的噪声分析[J].光学技术,1999,3(5):8-10
35.Katsumi Lwatsuki,Kazuo Hotate,and Minoru Higashiguehi.Eigenstate of polarization in a fiber ring resonator and its effect in an optical passive ring-resonator gyro[J].Applied Optics,1986,25(15):2606-2612
36.马慧莲,金仲和,丁纯.谐振腔光纤陀螺信号检测方法的研究[J].中国激光,2004,31(8):1001-1005
37.马立宁,乐光新,詹菲编著.MATLAB与通信仿真[M].北京:人民邮电出版社,2000
38.Y.Lai and I.Bennion.Wavelength-switchable DBR fibre laser with high spectral purity output[J],IEEE Elec.Elett.,2006,42(1):458-462
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