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Intensity properties of output light in prisms laser gyro with mechanical dither bias

Yao Cheng-Kang Zeng Xiao-Dong Cao Chang-Qing

Intensity properties of output light in prisms laser gyro with mechanical dither bias

Yao Cheng-Kang, Zeng Xiao-Dong, Cao Chang-Qing
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  • For the modulation phenomenon of output light intensity in the laser gyro consisting of totally reflecting prisms during its dither bias, the effect of mechanical dither is calculated and analyzed systematically. By the numerical simulation and finite element analysis methods, an analytical expression for the output light intensity of the laser gyro is derived as a function of stress induced birefringence and deviation of photodetector. A new laser gyro type with the symmetic rectangle structure that can improve the stability of optical output is suggested for the first time. The results show that the position assembly accuracy of the photodetector and the stress induced birefringence have a significant effect on light intensity modulation. Reducing the photodetector deviation and using symmetic prisms material with a suitable refractive index, the extent of intensity modulation could be reduced by over 52.63%. The analytic study provides an important reference for improving the quality of output light and the reliability of prisms laser gyro.
    • Funds: Project supported by the National High Technology Research and Development Program of China (Grant No. 2006AA12Z144).
    [1]

    Xiong Z Y, Yao Z W, Wang L, Li R B, Wang J, Zhan M S 2011 Acta Phys. Sin. 60 113201 (in Chinese) [熊宗元, 姚战伟, 王玲, 李润兵, 王谨, 詹明生 2011 物理学报 60 113201]

    [2]

    Yao C K, Li Q H 2011 Infrared and Laser Engineering 40 1090

    [3]

    Hashimoto T, Maeya J, Fujita T, Maenaka K 2009 Procedia Chemistry 1 564

    [4]

    Zhang Y S, Tang Q A, Pan Z W 1990 Acta Aeronautica et Astronautica Sinica 11 A120 (in Chinese) [章燕申, 汤全安, 潘珍吾 1990 航空学报 11 A120]

    [5]

    Wang K D, Gu Q T 2001 Tsinghua Science and Technology 6 304

    [6]

    Yuan B L, Han S L, Yang J Q, Liao D 2011 Journal of Chinese Inertial Technology 19 145

    [7]

    Broslavets Y Y, Zaitseva T E, Kazakov A A, Fomichev A A 2006 Quantum Electron 36 447

    [8]

    Wang K D, Yan L, Gu Q T 2005 Sensors and Actuators A 119 75

    [9]

    Xie Y P 2000Ph. D. Dissertations (Changsha: National University of Defence Technology) (in Chinese) [谢元平 2000 博士学位论文 (长沙: 国防科学技术大学)]

    [10]

    Wan S P, Li F, Wang X F, Zhu Q 2008Infrared and Laser Engineering 37 728 (in Chinese) [万顺平, 李峰, 王小飞, 朱强 2008 红外与激光工程 37 728]

    [11]

    Liu Y H, Li H F 2009 Nuclear Instrumentation and Methods in Physics Research Section A 598 605

    [12]

    Walter K 2006 Solid State Laser Engineering (New York: Springer) p205

    [13]

    Ou J, Jiang Y S, Li F, Liu L 2011 Acta Phys. Sin. 60 114203 (in Chinese) [欧军, 江月松, 黎芳, 刘丽 2011 物理学报 60 114203]

    [14]

    Matthew J B, Jean C D 2002 Optics Communications 213 331

    [15]

    Kwangjin K, Chan G P 2007 Sensors and Actuators A 133 425

    [16]

    Cen Z F, Li X T 2010 Acta Phys. Sin. 59 5784 (in Chinese) [岑兆丰, 李晓彤 2010 物理学报 59 5784]

    [17]

    Liu Y A, Rahman B M A 1995 J. Lightwave Technol. 13 142

    [18]

    Varallyay Z, Arashitani Y, Varga G 2011 Optical Fiber Technology 17 70

    [19]

    Fan Z F, Luo H, Hu S M 2011 Applied Optics 50 3455

  • [1]

    Xiong Z Y, Yao Z W, Wang L, Li R B, Wang J, Zhan M S 2011 Acta Phys. Sin. 60 113201 (in Chinese) [熊宗元, 姚战伟, 王玲, 李润兵, 王谨, 詹明生 2011 物理学报 60 113201]

    [2]

    Yao C K, Li Q H 2011 Infrared and Laser Engineering 40 1090

    [3]

    Hashimoto T, Maeya J, Fujita T, Maenaka K 2009 Procedia Chemistry 1 564

    [4]

    Zhang Y S, Tang Q A, Pan Z W 1990 Acta Aeronautica et Astronautica Sinica 11 A120 (in Chinese) [章燕申, 汤全安, 潘珍吾 1990 航空学报 11 A120]

    [5]

    Wang K D, Gu Q T 2001 Tsinghua Science and Technology 6 304

    [6]

    Yuan B L, Han S L, Yang J Q, Liao D 2011 Journal of Chinese Inertial Technology 19 145

    [7]

    Broslavets Y Y, Zaitseva T E, Kazakov A A, Fomichev A A 2006 Quantum Electron 36 447

    [8]

    Wang K D, Yan L, Gu Q T 2005 Sensors and Actuators A 119 75

    [9]

    Xie Y P 2000Ph. D. Dissertations (Changsha: National University of Defence Technology) (in Chinese) [谢元平 2000 博士学位论文 (长沙: 国防科学技术大学)]

    [10]

    Wan S P, Li F, Wang X F, Zhu Q 2008Infrared and Laser Engineering 37 728 (in Chinese) [万顺平, 李峰, 王小飞, 朱强 2008 红外与激光工程 37 728]

    [11]

    Liu Y H, Li H F 2009 Nuclear Instrumentation and Methods in Physics Research Section A 598 605

    [12]

    Walter K 2006 Solid State Laser Engineering (New York: Springer) p205

    [13]

    Ou J, Jiang Y S, Li F, Liu L 2011 Acta Phys. Sin. 60 114203 (in Chinese) [欧军, 江月松, 黎芳, 刘丽 2011 物理学报 60 114203]

    [14]

    Matthew J B, Jean C D 2002 Optics Communications 213 331

    [15]

    Kwangjin K, Chan G P 2007 Sensors and Actuators A 133 425

    [16]

    Cen Z F, Li X T 2010 Acta Phys. Sin. 59 5784 (in Chinese) [岑兆丰, 李晓彤 2010 物理学报 59 5784]

    [17]

    Liu Y A, Rahman B M A 1995 J. Lightwave Technol. 13 142

    [18]

    Varallyay Z, Arashitani Y, Varga G 2011 Optical Fiber Technology 17 70

    [19]

    Fan Z F, Luo H, Hu S M 2011 Applied Optics 50 3455

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  • Received Date:  13 November 2011
  • Accepted Date:  10 May 2012
  • Published Online:  05 May 2012

Intensity properties of output light in prisms laser gyro with mechanical dither bias

  • 1. School of Technical Physics, Xidian University, Xi'an 710071, China
Fund Project:  Project supported by the National High Technology Research and Development Program of China (Grant No. 2006AA12Z144).

Abstract: For the modulation phenomenon of output light intensity in the laser gyro consisting of totally reflecting prisms during its dither bias, the effect of mechanical dither is calculated and analyzed systematically. By the numerical simulation and finite element analysis methods, an analytical expression for the output light intensity of the laser gyro is derived as a function of stress induced birefringence and deviation of photodetector. A new laser gyro type with the symmetic rectangle structure that can improve the stability of optical output is suggested for the first time. The results show that the position assembly accuracy of the photodetector and the stress induced birefringence have a significant effect on light intensity modulation. Reducing the photodetector deviation and using symmetic prisms material with a suitable refractive index, the extent of intensity modulation could be reduced by over 52.63%. The analytic study provides an important reference for improving the quality of output light and the reliability of prisms laser gyro.

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