2011 International Conference on Space Optical Systems and Applications (ICSOS)最新文献_第7页

Hybrid RF / optical communication terminal with spherical primary optics for optical reception 混合射频/光通信终端，具有用于光接收的球形主光学器件

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783663

J. Charles, D. Hoppe, A. Sehic

{"title":"Hybrid RF / optical communication terminal with spherical primary optics for optical reception","authors":"J. Charles, D. Hoppe, A. Sehic","doi":"10.1109/ICSOS.2011.5783663","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783663","url":null,"abstract":"Future deep space communications are likely to employ not only the existing RF uplink and downlink, but also a high capacity optical downlink. The Jet Propulsion Laboratory (JPL) is currently investigating the benefits of a ground based hybrid RF and deep space optical terminal based on limited modification of existing 34 meter antenna designs. The ideal design would include as large an optical aperture as technically practical and cost effective, cause minimal impact to RF performance, and remain cost effective even when compared to a separate optical terminal of comparable size. Numerous trades and architectures have been considered, including shared RF and optical apertures having aspheric optics and means to separate RF and optical signals, plus, partitioned apertures in which various zones of the primary are dedicated to optical reception. A design based on the latter is emphasized in this paper, employing spherical primary optics and a new version of a “clamshell” corrector that is optimized to fit within the limited space between the antenna sub-reflector and the existing apex structure that supports the sub-reflector. The mechanical design of the hybrid accommodates multiple spherical primary mirror panels in the central 11 meters of the antenna, and integrates the clamshell corrector and optical receiver modules with antenna hardware using existing attach points to the maximum extent practical. When an optical collection area is implemented on a new antenna, it is possible to design the antenna structure to accommodate the additional weight of optical mirrors providing an equivalent aperture of several meters diameter. The focus of our near term effort is to use optics with the 34 meter DSS-13 antenna at Goldstone to demonstrate spatial optical acquisition and tracking capability using an optical system that is temporarily integrated into the antenna.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129008462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Laboratory test results for adaptive optics using image-based wavefront sensing for remote sensing 基于图像的波前遥感自适应光学的实验室测试结果

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.2322/TASTJ.10.PN_1

N. Miyamura

{"title":"Laboratory test results for adaptive optics using image-based wavefront sensing for remote sensing","authors":"N. Miyamura","doi":"10.2322/TASTJ.10.PN_1","DOIUrl":"https://doi.org/10.2322/TASTJ.10.PN_1","url":null,"abstract":"Large aperture optical system is required for high resolution and high signal to nose ratio remote sensing observations. In this case, adaptive optics is used to compensate the wavefront aberration generated by the misalignment or the thermal deformation of the optical elements. We use a liquid crystal on silicon spatial light modulator (LCOS-SLM) for the optical wavefront control, and image-based wavefront sensing which realize simple hardware architecture. For image-based sensing, a priori information is required in addition to the acquired images. We use phase diversity (PD) wavefront sensing method which applies a priori information called PD to the optics. By using PDs and acquired images, we can estimate arbitrary wavefront aberration. In this case, the sensitivity of the acquired image to the aberration mode depends on the applied PD. We use LCOS-SLM to apply the optimal set of PDs. We constructed adaptive optics system testbed using LCOS-SLM and USB camera. In this system, we used a Shack-Hartmann wavefront sensor (SHWS) to compare the estimated wavefront aberration with the actual wavefront measured by the SHWS. The laboratory test results show that the proposed system improves the optical performance of the remote sensing sensors.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128758465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Downlink synchronization for the lunar laser communications demonstration 月球激光通信演示下行同步

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783716

M. M. Willis, B. Robinson, M. Stevens, B. Romkey, J. A. Matthews, J. Greco, M. Grein, E. Dauler, A. Kerman, D. Rosenberg, D. V. Murphy, D. Boroson

{"title":"Downlink synchronization for the lunar laser communications demonstration","authors":"M. M. Willis, B. Robinson, M. Stevens, B. Romkey, J. A. Matthews, J. Greco, M. Grein, E. Dauler, A. Kerman, D. Rosenberg, D. V. Murphy, D. Boroson","doi":"10.1109/ICSOS.2011.5783716","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783716","url":null,"abstract":"The Lunar Laser Communications Demonstration (LLCD) is an ongoing project to demonstrate a high-rate, bidirectional optical communications link between a lunar satellite and an Earth-based ground terminal. The optical downlink operates at data rates up to 622 Mbps and employs photon counting array receiver technology. While the use of a 16-PPM modulation format with narrow (200 ps) slots gives rise to challenging time-alignment requirements between the transmit and receive oscillators that are in constant orbital motion with respect to one another, the additional signaling bandwidth also offers the unique opportunity to provide high-resolution, centimeter-class ranging data between the satellite and the ground terminal. We discuss some of the link challenges that necessitated the creation of novel clock recovery techniques, outline the design and analysis of the header detection algorithms used to perform synchronization on the LLCD high-speed optical downlink, and present the hardware implementation and photon-counting communication testbed used to validate the design.","PeriodicalId":107082,"journal":{"name":"2011 International Conference on Space Optical Systems and Applications (ICSOS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130204686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Optical communications payload for the Mexican nanosatellite project SENSAT 墨西哥纳米卫星项目SENSAT的光通信有效载荷

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783651

F. Mendieta, A. Arvizu, R. Muraoka, E. Pacheco, Juan C. Murrieta, J. Sánchez, J. Gutierrez

引用次数: 1

A free space optical communications system: An M-ary multi-pulse width Modulation scheme with emphasis on optimizing transmit power 自由空间光通信系统:一种以优化发射功率为重点的多脉宽调制方案

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1109/ICSOS.2011.5783666

E. Kozachenko, Matthew E. Anderson

引用次数: 6

5.625 Gbps bidirectional laser communications measurements between the NFIRE satellite and an Optical Ground Station 5.625 Gbps双向激光通信测量在NFIRE卫星和一个光学地面站之间

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-05-11 DOI: 10.1117/12.894662

R. Fields, D. Kozlowski, H. Yura, R. Wong, J. Wicker, C. Lunde, M. Gregory, B. Wandernoth, F. Heine

引用次数: 64

On approaching the ultimate limits of photon-efficient and bandwidth-efficient optical communication 接近光子高效和带宽高效光通信的极限

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2011-04-13 DOI: 10.1109/ICSOS.2011.5783682

S. Dolinar, K. Birnbaum, B. Erkmen, B. Moision

引用次数: 24

Scintillation index of the free space optical channel: Phase screen modelling and experimental results 自由空间光通道的闪烁指数:相位屏模型和实验结果

2011 International Conference on Space Optical Systems and Applications (ICSOS) Pub Date : 2010-10-20 DOI: 10.1109/ICSOS.2011.5783706

K. Mudge, K. Silva, B. Clare, K. Grant, B. Nener

引用次数: 17