基于激光偏振态的自适应信号处理的应用
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摘要
信息通信技术的快速进步,人们的生活也发生了翻天覆地的变化,尤其是光通信技术的进展。但是由于激光在大气中传输时,会相互作用于大气中的各种微粒,产生激光的大气吸收和大气散射效应,这些不可避免的吸收及散射效应,使得光通信中接收端激光的光功率不稳定。
本文是利用激光的偏振态的调制光强的知识,延伸到可变激光偏振态的新型光学器件-液晶可变延迟器。利用液晶可变延迟器的电可控性,利用AVR单片机设计的高精度液晶驱动电压源,实现对激光光束能量的自适应控制,稳定激光在大气湍流干扰下的光强。
电场的作用下,液晶分子的排列会发生变化,对入射激光的线偏振方向进行柔性调整,在偏振域实现对入射的激光能量的自适应控制,使光探测器接收到的激光能量保持稳定,从而使跟踪系统光探测器工作的信噪比维持稳定,使系统整体达到较高的跟踪精度。
With the rapid progress of information and communication technology, people's lives has undergone enormous changes, especially, the progress of optical communication technology. However,due to transmission of laser in the atmosphere,the interaction of various particles in the atmosphere,resulting in laser atmospheric absorption and atmospheric absorption and atmospheric scattering effects,the inevitable effect of the absorption and scattering,make the laser light power that was received in the optical communication r is not stability.
This article is the use of the knowledge that polarization state can modulated laser light intensity, extended to the new variable laser polarization optical devices-liquid crystal variable retarder. Using liquid crystal variable retarder electrical controllability, using AVR microcontroller designed for high-precision LCD drive voltage source to realize the adaptive control of laser beam energy, stable the intensity of laser in atmospheric turbulence.
Electric field, the LCD will change the arrangement of molecules on the polarization direction of incident laser line for flexible adjustment of the polarization field of the incident laser energy to achieve adaptive control, so that the light detector receives the laser energy remained stable, tracking system so that the work light detector signal to noise ratio remained stable, so that the whole system to achieve high tracking accuracy.
本文是利用激光的偏振态的调制光强的知识,延伸到可变激光偏振态的新型光学器件-液晶可变延迟器。利用液晶可变延迟器的电可控性,利用AVR单片机设计的高精度液晶驱动电压源,实现对激光光束能量的自适应控制,稳定激光在大气湍流干扰下的光强。
电场的作用下,液晶分子的排列会发生变化,对入射激光的线偏振方向进行柔性调整,在偏振域实现对入射的激光能量的自适应控制,使光探测器接收到的激光能量保持稳定,从而使跟踪系统光探测器工作的信噪比维持稳定,使系统整体达到较高的跟踪精度。
With the rapid progress of information and communication technology, people's lives has undergone enormous changes, especially, the progress of optical communication technology. However,due to transmission of laser in the atmosphere,the interaction of various particles in the atmosphere,resulting in laser atmospheric absorption and atmospheric absorption and atmospheric scattering effects,the inevitable effect of the absorption and scattering,make the laser light power that was received in the optical communication r is not stability.
This article is the use of the knowledge that polarization state can modulated laser light intensity, extended to the new variable laser polarization optical devices-liquid crystal variable retarder. Using liquid crystal variable retarder electrical controllability, using AVR microcontroller designed for high-precision LCD drive voltage source to realize the adaptive control of laser beam energy, stable the intensity of laser in atmospheric turbulence.
Electric field, the LCD will change the arrangement of molecules on the polarization direction of incident laser line for flexible adjustment of the polarization field of the incident laser energy to achieve adaptive control, so that the light detector receives the laser energy remained stable, tracking system so that the work light detector signal to noise ratio remained stable, so that the whole system to achieve high tracking accuracy.
引文
[1]张瑞君.国内外通信调制器技术新进展.创新应用.2007.04
[2]朱若谷.激光应用技术.北京：国防工业出版社；2006.14-39
[3]LUTZ H P. Optical Communications in space-Twenty yeas of ESA effort [J]. ESA. Bull,1997, (91):25-31.
[4]杨祥林诸波徐宁等.空间光通信技术：南京邮电学院学报2002
[5]夏贵进占生宝谢小平.空间激光通信技术及其发展： 军事通信技术2002,23(2)
[6]崔准,陈名松.光通信系统中圆偏振光的应用研究.光网络与系统.2005
[7]王海先.大气中激光通信技术： 红外与激光,2001,30(2)：123-127.
[8]罗彤胡渝.自由空间光通信地面演示系统光束APT设计与实现：应用光学,2002,23(2)
[9]Yong Cai,Yayan Liu, Hongwen ren etc. Phase Seperation theory and Application—Phase behaviour and Morphology of Polymer/Liquid Crystal blends, 7APPC.
[10]Meadowlark Optic. An Economical Means for Accurate Azimuthal Alignment of Polarization Optics.2005
[11]WILSON K. Optical Communications for Deep Space missions [J]. IEEE Commun Mag,2000,38 (8):134-139.
[12]LIU Jian, KE Xi-zheng, ZHAO Li. Experimental Measurement of Atmospheric Laser Communication. ACTA PH OTONICA SINICA.2007.6.
[13]蔡燕民陈刚董作人等.空间激光通信系统进展：激光与光电子学进展2000(5) 1-7.
[14]陈媛余成波万文略.自由空间激光通信技术及其发展： 重庆工学院学报,2002(6),16(3)
[15]张亚迪.数字电位器X9313在微信号检测中的应用.国外电子元器件.2007,8：58-61
[16]邓明成蔡健乐.液晶基础：湖南大学学报.2000年增刊.
[17]阎景富.大气激光通信中APT技术的研究： [学位论文].长春理工大学,2003.
[18]马东堂魏急波庄钊文.空间激光通信及应用：半导体技术,2003,24(2).27(1),13-16.
[19]Meadowlark Optic. Response time in Liquid-Crystal Variable Retarders.2005
[20]Meadowlark Optic. Liquid Crystal in Precision Optical Devices.2005
[21]Johnson K, et al:Smart Spatial Light Modulators U sing Liquid Crystals On Silicon [J] IEEE,1993, QE-29 (2):699-714.
[22]廖延彪.偏振光学.北京：科学出版社,2003：45-56,231-252
[23]Meadowlark Optic. D3000 Liquid Crystal Polarimeter User's Manual.2005
[24]王治华,俞信.液晶空间光调制器相位调制测量及波前校正.光学技术,2005
[25]柯熙政,殷致云,杨利红.大气激光通信中光PPM偏振调制方案及其关键技术.半导体光电,2007.8
[26]Meadowlark Optic. Liquid Crystal in Precision Optical Devices.2005
[27]周仁忠 阎吉祥.自适应光学理论北京理工大学出版社.
[28]阎庆祥.液晶空间光调制器在自适应光学中的应用：光学技术,No.2,3(1999).
[29]ImageCraft Creation Inc. ImageCraft IDE for ICCAVR Mser Guide. Version 6.31B Built,2004
[30]张毅刚,彭喜元,姜守达等.新编MCS-51单片机应用技术.哈尔滨：哈尔滨工业大学出版社,2003：225-230
[31]沈文、Eagle lee、詹卫前；AVR单片机C语言开发入门知道；清华大学出版社,2003：7~20
[32]金春林,邱慧芳,AVR系列单片机C语言编程与应用实例[M].北京：清华大学出版社,2002：116~135
[2]朱若谷.激光应用技术.北京：国防工业出版社；2006.14-39
[3]LUTZ H P. Optical Communications in space-Twenty yeas of ESA effort [J]. ESA. Bull,1997, (91):25-31.
[4]杨祥林诸波徐宁等.空间光通信技术：南京邮电学院学报2002
[5]夏贵进占生宝谢小平.空间激光通信技术及其发展： 军事通信技术2002,23(2)
[6]崔准,陈名松.光通信系统中圆偏振光的应用研究.光网络与系统.2005
[7]王海先.大气中激光通信技术： 红外与激光,2001,30(2)：123-127.
[8]罗彤胡渝.自由空间光通信地面演示系统光束APT设计与实现：应用光学,2002,23(2)
[9]Yong Cai,Yayan Liu, Hongwen ren etc. Phase Seperation theory and Application—Phase behaviour and Morphology of Polymer/Liquid Crystal blends, 7APPC.
[10]Meadowlark Optic. An Economical Means for Accurate Azimuthal Alignment of Polarization Optics.2005
[11]WILSON K. Optical Communications for Deep Space missions [J]. IEEE Commun Mag,2000,38 (8):134-139.
[12]LIU Jian, KE Xi-zheng, ZHAO Li. Experimental Measurement of Atmospheric Laser Communication. ACTA PH OTONICA SINICA.2007.6.
[13]蔡燕民陈刚董作人等.空间激光通信系统进展：激光与光电子学进展2000(5) 1-7.
[14]陈媛余成波万文略.自由空间激光通信技术及其发展： 重庆工学院学报,2002(6),16(3)
[15]张亚迪.数字电位器X9313在微信号检测中的应用.国外电子元器件.2007,8：58-61
[16]邓明成蔡健乐.液晶基础：湖南大学学报.2000年增刊.
[17]阎景富.大气激光通信中APT技术的研究： [学位论文].长春理工大学,2003.
[18]马东堂魏急波庄钊文.空间激光通信及应用：半导体技术,2003,24(2).27(1),13-16.
[19]Meadowlark Optic. Response time in Liquid-Crystal Variable Retarders.2005
[20]Meadowlark Optic. Liquid Crystal in Precision Optical Devices.2005
[21]Johnson K, et al:Smart Spatial Light Modulators U sing Liquid Crystals On Silicon [J] IEEE,1993, QE-29 (2):699-714.
[22]廖延彪.偏振光学.北京：科学出版社,2003：45-56,231-252
[23]Meadowlark Optic. D3000 Liquid Crystal Polarimeter User's Manual.2005
[24]王治华,俞信.液晶空间光调制器相位调制测量及波前校正.光学技术,2005
[25]柯熙政,殷致云,杨利红.大气激光通信中光PPM偏振调制方案及其关键技术.半导体光电,2007.8
[26]Meadowlark Optic. Liquid Crystal in Precision Optical Devices.2005
[27]周仁忠 阎吉祥.自适应光学理论北京理工大学出版社.
[28]阎庆祥.液晶空间光调制器在自适应光学中的应用：光学技术,No.2,3(1999).
[29]ImageCraft Creation Inc. ImageCraft IDE for ICCAVR Mser Guide. Version 6.31B Built,2004
[30]张毅刚,彭喜元,姜守达等.新编MCS-51单片机应用技术.哈尔滨：哈尔滨工业大学出版社,2003：225-230
[31]沈文、Eagle lee、詹卫前；AVR单片机C语言开发入门知道；清华大学出版社,2003：7~20
[32]金春林,邱慧芳,AVR系列单片机C语言编程与应用实例[M].北京：清华大学出版社,2002：116~135