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浏览/检索结果: 共3条，第1-3条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 星载精密光谱测量用激光器稳频技术研究 学位论文 博士: 中国科学院上海光学精密机械研究所, 2014 作者:  黄崇德 收藏  |  浏览/下载：58/0  |  提交时间：2016/11/28 差分吸收激光雷达，大气垂直干涉仪，频率调制光谱稳频技术，多普勒吸收线，空芯光子晶体光纤   Physical layer design for free space optical communication (EI CONFERENCE) 会议论文 2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012, December 7, 2012 - December 9, 2012, Shenyang, Liaoning, China Wang H.; Guo J.; Wang T.; Zhang Q.; Shao J. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 A small size Free Space Optical Communication System is introduced  including the hardware and the hardware specified physical layer protocol. In detail  the rapid synchronization method to reduce the handshake bandwidth requirement is demonstrated. The hardware of the system includes the laser driver system  the signal amplifying and shaping system  the data interface system. The hardware specified physical layer protocol is used to interface the outer data  serialize and deserialize the data stream  check transmission errors and schedule the data transmission. The overall system is a FIFO-like system and the user can use it as if he's operating a FIFO. The system is designed mainly for terrestrial FSO link whose signal channel is the atmosphere. Due to the complex composition and activity of the atmosphere  this signal channel brings in great influence on the transmitting laser in it  for example  the absorption and scattering of the atmosphere molecules and aerosols  the scintillation of received laser power caused by the turbulence of the atmosphere  all of which results in a much higher Bit Error Rate (BER) of the communication system than wired communication systems leading to frequent resynchronization. In our system  the sampling clock is generated locally using multi-phase sampling technique rather than PLLbased clock recovery  which helps to rapid synchronization. 2012 IEEE.   电光陶瓷和微机械光束导向技术的研究 学位论文 博士: 中国科学院上海光学精密机械研究所, 2009 作者:  董作人 收藏  |  浏览/下载：61/0  |  提交时间：2016/11/28 PLZT  光学相控阵  MEMS  光开关  CCD  FPGA