二维同步空间偏振编码激光驾束制导技术研究

【作者】 周木春；

【导师】 陈延如；

【作者基本信息】 南京理工大学 ， 物理电子学， 2004， 硕士

【摘要】 介绍了激光驾束制导系统的基本原理，研究了激光驾束制导中的偏振编码解码技术。通过编码器后激光的偏振态被调制，在不同的位置产生不同椭圆度的椭圆偏振光，从而使光束携带位置信息。证明了偏振编码驾束制导方式在采用合适的数据处理方式时对接收机的旋转不敏感性。为解决制导中的实时性问题，提出了一种新的二维同步偏振编码方案。重点研究了适于偏振编码的器件，设计了基于电光效应的铌酸锂晶体调制编码单元，并给出解码方案，提出了接收处理电路的设计方案。在实验室条件下的初步实验结果表明了方案的可行性。更多还原

【Abstract】 A system for providing signals that are indicative of a missile’s position across a laser beam is described. The beam rider guidance system comprises a transmitter for transmitting beam that is encoded by the modulators such that the polarization state of the beam varies across the beam, and a receiver that responds to the polarization of the received energy to provide signals indicative of the relative position of the missile within the beam. In order to realize real-time guidance, a means of encoding the two dimensions of the beam synchronously at a different modulation frequency was invented. And that the position determining measurement is substantially independence of rotation is proved. The emphasis of the paper is to study and compare the devices suitable for polarization encoding. Three kinds of crystal’s phase lags by the action of electric field on the basis of Pockels effect were studied. The principle of the modulator based on electro-optic effect is introduced. A modulator made up of Lithium Niobate(LiNbO3) crystal was designed.更多还原