利用锗酸铋晶体的电光补偿型光学应力传感器
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摘要
利用锗酸铋(BGO)晶体的弹光双折射与电光双折射可以相互补偿的特性,设计并研究了一种新型光学应力传感器。折射率椭球分析结果表明,在垂直于BGO晶体的(111)晶面方向上同时施加应力和电场,晶体的弹光双折射能够被电光双折射所补偿,因而可以实现应力的闭环光学测量。光学传感单元主要包括两个棱镜偏振器和一块平行四边形的BGO晶体,该晶体自身能够通过对光波的两次全反射产生0.5π的光学相位偏置,因而不需要附加四分之一波片。实验测量了30kPa以内的压缩应力,被测压缩应力与补偿电压之间具有较好的线性关系,且每1kPa压缩应力所需要的补偿电压约为4.26V。
An optical stress sensor is proposed and demonstrated in experiment based on single bismuth germanate(BGO)crystal and electrooptic compensation.The sensing principle is mainly based on the mutual compensation property between photoelastic birefringence and electrooptic birefringence existing in the BGO crystal.According to the index ellipsoid analysis method,when external stress and electric field are simultaneously applied to the(111)crystalline surface,photoelastic birefringence of the BGO crystal can be compensated by its electrooptic birefringence,thus it is possible to perform the closed-loop measurement of external stress by the method of electrooptic compensation.The proposed optical stress-sensing unit is only composed of two prism polarizers and single parallelogramic BGO crystal.Additional quarter waveplate is not needed for the proposed stress sensor since the optical phase bias of 0.5πis produced by two times of total inner reflection of light wave in the BGO crystal itself.Compression stress is measured in the range of 30 kPa and experimental data demonstrated a good linear relationship between compensating voltage and measurand stress.The compensating voltage is about 4.26 V corresponding to the applied stress of 1 kPa.
An optical stress sensor is proposed and demonstrated in experiment based on single bismuth germanate(BGO)crystal and electrooptic compensation.The sensing principle is mainly based on the mutual compensation property between photoelastic birefringence and electrooptic birefringence existing in the BGO crystal.According to the index ellipsoid analysis method,when external stress and electric field are simultaneously applied to the(111)crystalline surface,photoelastic birefringence of the BGO crystal can be compensated by its electrooptic birefringence,thus it is possible to perform the closed-loop measurement of external stress by the method of electrooptic compensation.The proposed optical stress-sensing unit is only composed of two prism polarizers and single parallelogramic BGO crystal.Additional quarter waveplate is not needed for the proposed stress sensor since the optical phase bias of 0.5πis produced by two times of total inner reflection of light wave in the BGO crystal itself.Compression stress is measured in the range of 30 kPa and experimental data demonstrated a good linear relationship between compensating voltage and measurand stress.The compensating voltage is about 4.26 V corresponding to the applied stress of 1 kPa.
引文
1 STai,K Kyuma,M Nunoshita.Fiber-optic acceleration sensor based on the photoelastic effect[J].Appl Opt,1983,22(11):1771-1774.
2 Li Zhicheng,Tang Zhilie,Chen Ping,et al..Study of photoelastic stress distribution and imaging method based on Stokes parameter[J].Acta Optica Sinica,2012,32(5):0512005.李志诚,唐志列,陈萍,等.基于斯托克斯参量的光弹性应力分布及成像方法研究[J].光学学报,2012,32(5):0512005.
3 Su Yang,Zhang Baofu,Zhu Yong,et al..Real-time pressure measurements using Stokes parameter in fiber Bragg gratings and the performance analysis[J].Acta Optica Sinica,2012,32(11):1128002.苏洋,张宝富,朱勇,等.基于光栅透射光斯托克斯参量的实时压力传感方法及性能优化[J].光学学报,2012,32(11):1128002.
4 Chen Gang,Liao Liji,Hao Wei.Fundamentals of Crystal Optics[M].Beijing:Science Press,2007.陈纲,廖理几,郝伟.晶体物理学基础[M].北京:科学出版社,2007.
5 CLi.Optical stress sensor based on electro-optic compensation for photoelastic birefringence in a single crystal[J].Appl Opt,2011,50(27):5315-5320.
6 Yu Kuanxin,Ding Xiaohong,Pang Zhaoguang,et al..Principles and Devices of Acousto-Optics[M].Beijing:Science Press,2011.俞宽新,丁晓红,庞兆广.声光原理与声光器件[M].北京:科学出版社,2011.
7 Chen Youhua,Zhang Jilong,Wang Yanchao,et al..Single crystal photo-elastic modulator based on lithium niobate piezoelectric and photo-elastic effect[J].Acta Optica Sinica,2012,32(11):1116002.陈友华,张记龙,王艳超,等.基于铌酸锂压电弹光双效应的单晶体弹光调制器[J].光学学报,2012,32(11):1116002.
8 A Yariv,P Yeh.Photonics:Optical Electronics in Modern Communications[M].London:Oxford University Press,2007.
9 CLi,R Zeng.Optical voltage sensor using single Fresnel rhomb Bi4Ge3O12crystal[J].IEEE Sensors Journal,2014,14(1):79-84.
10 PA Williams,A H Rose,K S Lee,et al..Optical,thermooptic,electro-optic,and photoelastic properties of bismuth germanate(Bi4Ge3O12)[J].Appl Opt,1996,35(19):3562-3569.
11 Xiao Xia,Xu Yan,Ye Miaoyuan.Influence of temperature and stress field on optical voltage sensor[J].Piezoelectrics&Acoustooptics,2006,28(5):524-526.肖霞,徐雁,叶妙元.温度场、应力场对光学电压传感器影响的分析[J].压电与声光,2006,28(5):524-526.
12 Dong Yantao,Zhao Zhigang,Liu Chong,et al..Influence of thermal effects on polarizability and output character of TEM00-mode of solid state laser[J].Chinese J Lasers,2009,36(7):1759-1765.董延涛,赵智刚,刘崇,等.热效应对固体激光器偏振特性和基模输出特性的影响[J].中国激光,2009,36(7):1759-1765.
13 Cen Zhaofeng,Li Xiaotong.Light transmission in thermal stressinduced birefringent medium[J].Acta Physica Sinica,2010,59(8):5784-5790.岑兆丰,李晓彤.热应力双折射介质中的光传输研究[J].物理学报,2010,59(8):5784-5790.
2 Li Zhicheng,Tang Zhilie,Chen Ping,et al..Study of photoelastic stress distribution and imaging method based on Stokes parameter[J].Acta Optica Sinica,2012,32(5):0512005.李志诚,唐志列,陈萍,等.基于斯托克斯参量的光弹性应力分布及成像方法研究[J].光学学报,2012,32(5):0512005.
3 Su Yang,Zhang Baofu,Zhu Yong,et al..Real-time pressure measurements using Stokes parameter in fiber Bragg gratings and the performance analysis[J].Acta Optica Sinica,2012,32(11):1128002.苏洋,张宝富,朱勇,等.基于光栅透射光斯托克斯参量的实时压力传感方法及性能优化[J].光学学报,2012,32(11):1128002.
4 Chen Gang,Liao Liji,Hao Wei.Fundamentals of Crystal Optics[M].Beijing:Science Press,2007.陈纲,廖理几,郝伟.晶体物理学基础[M].北京:科学出版社,2007.
5 CLi.Optical stress sensor based on electro-optic compensation for photoelastic birefringence in a single crystal[J].Appl Opt,2011,50(27):5315-5320.
6 Yu Kuanxin,Ding Xiaohong,Pang Zhaoguang,et al..Principles and Devices of Acousto-Optics[M].Beijing:Science Press,2011.俞宽新,丁晓红,庞兆广.声光原理与声光器件[M].北京:科学出版社,2011.
7 Chen Youhua,Zhang Jilong,Wang Yanchao,et al..Single crystal photo-elastic modulator based on lithium niobate piezoelectric and photo-elastic effect[J].Acta Optica Sinica,2012,32(11):1116002.陈友华,张记龙,王艳超,等.基于铌酸锂压电弹光双效应的单晶体弹光调制器[J].光学学报,2012,32(11):1116002.
8 A Yariv,P Yeh.Photonics:Optical Electronics in Modern Communications[M].London:Oxford University Press,2007.
9 CLi,R Zeng.Optical voltage sensor using single Fresnel rhomb Bi4Ge3O12crystal[J].IEEE Sensors Journal,2014,14(1):79-84.
10 PA Williams,A H Rose,K S Lee,et al..Optical,thermooptic,electro-optic,and photoelastic properties of bismuth germanate(Bi4Ge3O12)[J].Appl Opt,1996,35(19):3562-3569.
11 Xiao Xia,Xu Yan,Ye Miaoyuan.Influence of temperature and stress field on optical voltage sensor[J].Piezoelectrics&Acoustooptics,2006,28(5):524-526.肖霞,徐雁,叶妙元.温度场、应力场对光学电压传感器影响的分析[J].压电与声光,2006,28(5):524-526.
12 Dong Yantao,Zhao Zhigang,Liu Chong,et al..Influence of thermal effects on polarizability and output character of TEM00-mode of solid state laser[J].Chinese J Lasers,2009,36(7):1759-1765.董延涛,赵智刚,刘崇,等.热效应对固体激光器偏振特性和基模输出特性的影响[J].中国激光,2009,36(7):1759-1765.
13 Cen Zhaofeng,Li Xiaotong.Light transmission in thermal stressinduced birefringent medium[J].Acta Physica Sinica,2010,59(8):5784-5790.岑兆丰,李晓彤.热应力双折射介质中的光传输研究[J].物理学报,2010,59(8):5784-5790.