Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783714
Abdullah Sevincer, Hasan T. Karaoglu, M. Yuksel
Free-space-optical (FSO) communication has recently attracted attention as a complementary alternative to radio frequency (RF) wireless networks. However, the directionality of FSO communication is prone to mobility which requires maintenance of line-of-sight (LOS) alignment between FSO transceivers. By using multiple transceivers per node and automatically detecting neighbor nodes that are in LOS each other, we showed how to maintain the LOS alignment on FSO nodes. In this paper, we present a prototype implementation of such multi-transceiver electronically-steered communication structures to measure the performance of a voice file transfer over such multi-transceiver systems. We show that by using multiple directional transceivers and LOS detection and establishment protocol, we can assign multiple logical data streams to appropriate physical transceivers and transfer different voice files simultaneously to multiple FSO nodes with tolerable disruptions and overhead.
{"title":"Performance analysis of voice transfer using multi-transceiver optical communication structures","authors":"Abdullah Sevincer, Hasan T. Karaoglu, M. Yuksel","doi":"10.1109/ICSOS.2011.5783714","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783714","url":null,"abstract":"Free-space-optical (FSO) communication has recently attracted attention as a complementary alternative to radio frequency (RF) wireless networks. However, the directionality of FSO communication is prone to mobility which requires maintenance of line-of-sight (LOS) alignment between FSO transceivers. By using multiple transceivers per node and automatically detecting neighbor nodes that are in LOS each other, we showed how to maintain the LOS alignment on FSO nodes. In this paper, we present a prototype implementation of such multi-transceiver electronically-steered communication structures to measure the performance of a voice file transfer over such multi-transceiver systems. We show that by using multiple directional transceivers and LOS detection and establishment protocol, we can assign multiple logical data streams to appropriate physical transceivers and transfer different voice files simultaneously to multiple FSO nodes with tolerable disruptions and overhead.","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":"116955396","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783690
Y. Shoji, Y. Takayama, M. Toyoshima, M. Fice, A. Seeds
The feasibility of an optical injection phase lock loop technique for use in a coherent laser communications link between a LEO (Low Earth Orbit Satellite) and a OGS (Optical Ground Station) is studied. The Doppler frequency shift in the LEO-OGS coherent link is estimated and the impact on the link performance is investigated. It is demonstrated experimentally that a 10 Gbps BPSK link can successfully maintain stable frequency and phase locking status under the condition that the signal laser frequency changes over 9 GHz at a frequency deviation rate up to 1 Hz, which is ample to meet the requirement for the LEO-OGS coherent link.
{"title":"Feasibility study of coherent LEO-ground link system using an optical injection phase lock loop technique","authors":"Y. Shoji, Y. Takayama, M. Toyoshima, M. Fice, A. Seeds","doi":"10.1109/ICSOS.2011.5783690","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783690","url":null,"abstract":"The feasibility of an optical injection phase lock loop technique for use in a coherent laser communications link between a LEO (Low Earth Orbit Satellite) and a OGS (Optical Ground Station) is studied. The Doppler frequency shift in the LEO-OGS coherent link is estimated and the impact on the link performance is investigated. It is demonstrated experimentally that a 10 Gbps BPSK link can successfully maintain stable frequency and phase locking status under the condition that the signal laser frequency changes over 9 GHz at a frequency deviation rate up to 1 Hz, which is ample to meet the requirement for the LEO-OGS coherent link.","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":"127493963","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783694
Jingyi He
In satellite-to-ground laser communication links, atmospheric turbulence has a strong influence on communication quality, and a communication link is difficult to establish or break even in strong turbulence. Large aperture optical antenna not only manufacturing costs a lot, but also many factors including volume have to be limited, at the same time the system would be difficult to repaired when satellite platform antenna in space complex environment is failure, so it is a viable solution that multiple small apertures array antenna is place of large-aperture antenna in the future. In order to cope with the effects of atmospheric turbulence and ensure system stability and reliability, in this paper we designed a kind of receiving/transmitting array antenna composed of several small aperture telescopes combined with space diversity, and analyzed far-field intensity distribution according to Huygens -Fresnel theory.
{"title":"Optical system architecture design of multiple apertures array antenna for satellite-to-ground optical communication","authors":"Jingyi He","doi":"10.1109/ICSOS.2011.5783694","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783694","url":null,"abstract":"In satellite-to-ground laser communication links, atmospheric turbulence has a strong influence on communication quality, and a communication link is difficult to establish or break even in strong turbulence. Large aperture optical antenna not only manufacturing costs a lot, but also many factors including volume have to be limited, at the same time the system would be difficult to repaired when satellite platform antenna in space complex environment is failure, so it is a viable solution that multiple small apertures array antenna is place of large-aperture antenna in the future. In order to cope with the effects of atmospheric turbulence and ensure system stability and reliability, in this paper we designed a kind of receiving/transmitting array antenna composed of several small aperture telescopes combined with space diversity, and analyzed far-field intensity distribution according to Huygens -Fresnel theory.","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":"128740578","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783653
H. Takenaka, M. Toyoshima, Y. Takayama, Y. Koyama, M. Akioka
50kg-class satellites can reduce production cost and time compared to larger satellites. On the other hand, the communication capacity in radio frequency for 50 kg-class satellites is limited, however it can be improved by using optical communications. The National Institute of Information and Communications Technology (NICT) has begun to develop a Small Optical TrAnsponder (SOTA) onboard a 50kg-class satellite, which project is called the Space Optical Communications Research Advanced Technology Satellite (SOCRATES). We will introduce the experiment plan for SOTA onboard the 50 kg-class small satellite.
{"title":"Experiment plan for a small optical transponder onboard a 50 kg-class small satellite","authors":"H. Takenaka, M. Toyoshima, Y. Takayama, Y. Koyama, M. Akioka","doi":"10.1109/ICSOS.2011.5783653","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783653","url":null,"abstract":"50kg-class satellites can reduce production cost and time compared to larger satellites. On the other hand, the communication capacity in radio frequency for 50 kg-class satellites is limited, however it can be improved by using optical communications. The National Institute of Information and Communications Technology (NICT) has begun to develop a Small Optical TrAnsponder (SOTA) onboard a 50kg-class satellite, which project is called the Space Optical Communications Research Advanced Technology Satellite (SOCRATES). We will introduce the experiment plan for SOTA onboard the 50 kg-class small satellite.","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":"130649884","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783681
M. Fujiwara, M. Toyoshima, M. Sasaki, K. Yoshino, Y. Nambu, A. Tomita
We report on the experimental demonstration of a source of hybrid entanglement pairs between two different degrees of freedom, a 1550 nm time-bin qubit and an 810 nm polarization qubit. The hybrid entanglement source is constructed of a non-degenerate photon pair source and a format transformer from time encoding to polarization encoding. This entanglement photon source will provide a fiber- space flexible QKD system.
{"title":"Hybrid entanglement photon pair source for fiber-space flexible QKD network","authors":"M. Fujiwara, M. Toyoshima, M. Sasaki, K. Yoshino, Y. Nambu, A. Tomita","doi":"10.1109/ICSOS.2011.5783681","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783681","url":null,"abstract":"We report on the experimental demonstration of a source of hybrid entanglement pairs between two different degrees of freedom, a 1550 nm time-bin qubit and an 810 nm polarization qubit. The hybrid entanglement source is constructed of a non-degenerate photon pair source and a format transformer from time encoding to polarization encoding. This entanglement photon source will provide a fiber- space flexible QKD system.","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":"113992032","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783667
M. Toyoshima, Takashi Sasaki, H. Takenaka, Y. Shoji, Y. Takayama, Y. Koyama, H. Kunimori, M. Akioka, M. Fujiwara, M. Sasaki
Since 2006, ground-to-satellite laser communication experiments have been successfully performed using intensity modulation/direct detection (IMDD) between the National Institute of Information and Communications Technology (NICT) optical ground station located in Tokyo and a low earth orbit (LEO) satellite. With the advent of coherent binary phase-shift keying (BPSK) receivers in orbit by a German satellite, it is now absolutely imperative to establish interoperability between the different optical communications systems. At NICT, an optical receiver that can demodulate both IMDD and coherent optical signals for free-space laser communications has been developed that can recover the carrier phase after homodyne detection by means of digital signal processing (DSP). A transportable optical ground station has also been developed for site-diversity purposes in order to increase accessibility between terrestrial and space systems. A new NICT mid-term research plan has started since April 2011 and this paper presents research and development in free-space laser communications technologies at NICT.
{"title":"Research and development of free-space laser communications and quantum key distribution technologies at NICT","authors":"M. Toyoshima, Takashi Sasaki, H. Takenaka, Y. Shoji, Y. Takayama, Y. Koyama, H. Kunimori, M. Akioka, M. Fujiwara, M. Sasaki","doi":"10.1109/ICSOS.2011.5783667","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783667","url":null,"abstract":"Since 2006, ground-to-satellite laser communication experiments have been successfully performed using intensity modulation/direct detection (IMDD) between the National Institute of Information and Communications Technology (NICT) optical ground station located in Tokyo and a low earth orbit (LEO) satellite. With the advent of coherent binary phase-shift keying (BPSK) receivers in orbit by a German satellite, it is now absolutely imperative to establish interoperability between the different optical communications systems. At NICT, an optical receiver that can demodulate both IMDD and coherent optical signals for free-space laser communications has been developed that can recover the carrier phase after homodyne detection by means of digital signal processing (DSP). A transportable optical ground station has also been developed for site-diversity purposes in order to increase accessibility between terrestrial and space systems. A new NICT mid-term research plan has started since April 2011 and this paper presents research and development in free-space laser communications technologies at NICT.","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":"115815131","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783684
F. Heine, H. Kampfner, P. Greulich, S. Seel
Tesat has developed and tested a coherent receiver for low light level applications such as deep space laser communication or LIDAR. The receiver is a plug in replacement of the homodyne communication receiver used for the TESAT LEO-GEO Laser Communication Terminals. Test results will be presented and possible application scenarios will be discussed. In addition to that, single frequency seeder laser sources have been developed suitable for coherent detection systems at 1064nm.
{"title":"Coherent detection of low light level pulses","authors":"F. Heine, H. Kampfner, P. Greulich, S. Seel","doi":"10.1109/ICSOS.2011.5783684","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783684","url":null,"abstract":"Tesat has developed and tested a coherent receiver for low light level applications such as deep space laser communication or LIDAR. The receiver is a plug in replacement of the homodyne communication receiver used for the TESAT LEO-GEO Laser Communication Terminals. Test results will be presented and possible application scenarios will be discussed. In addition to that, single frequency seeder laser sources have been developed suitable for coherent detection systems at 1064nm.","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":"133551731","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783702
A. Biswas, J. Kovalik, M. Regehr
Optical planetary access links to return information from surface assets on Mars to orbiting spacecraft for subsequent relay back to Earth will be discussed. The capabilities that can be realized using such links will be presented for a presumed concept of operations at Mars. Autonomous acquisition and tracking using low-complexity optical terminals will also be discussed.
{"title":"Future planetary optical access links","authors":"A. Biswas, J. Kovalik, M. Regehr","doi":"10.1109/ICSOS.2011.5783702","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783702","url":null,"abstract":"Optical planetary access links to return information from surface assets on Mars to orbiting spacecraft for subsequent relay back to Earth will be discussed. The capabilities that can be realized using such links will be presented for a presumed concept of operations at Mars. Autonomous acquisition and tracking using low-complexity optical terminals will also be discussed.","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":"114444951","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783679
Takahiro Watanabe, Minoru Watanabe
Demand is increasing daily for a robust VLSI chip that is useful for operating under a radiation-rich space environment, such as spacecraft, space satellites, and space stations. Optically reconfigurable gate arrays (ORGAs) have been developed to realize a large virtual gate count that is much larger than those of current VLSI chips by exploiting the large storage capacity of a holographic memory. The ORGA architecture is extremely robust for many failure modes caused by high-energy charged particles. This paper presents a robust 16-laser array for an optically reconfigurable gate array and its demonstration results.
{"title":"A 16-laser array for an optically reconfigurable gate array","authors":"Takahiro Watanabe, Minoru Watanabe","doi":"10.1109/ICSOS.2011.5783679","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783679","url":null,"abstract":"Demand is increasing daily for a robust VLSI chip that is useful for operating under a radiation-rich space environment, such as spacecraft, space satellites, and space stations. Optically reconfigurable gate arrays (ORGAs) have been developed to realize a large virtual gate count that is much larger than those of current VLSI chips by exploiting the large storage capacity of a holographic memory. The ORGA architecture is extremely robust for many failure modes caused by high-energy charged particles. This paper presents a robust 16-laser array for an optically reconfigurable gate array and its demonstration results.","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":"114536570","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}
Pub Date : 2011-05-11DOI: 10.1109/ICSOS.2011.5783703
S. Yamakawa, T. Hanada, H. Kohata
Optical free space communication is a key element of the future data-relay satellite system which supports space activities, especially in the fields of earth observation satellite programmes and manned flight missions. Aiming to realization of small and light-weight onboard optical terminals, JAXA launched research and development activities in 2008. The terminals have capabilities to enable communication links up to 2.5 Gbps between data relay satellites in GEO and LEO earth observation satellites. The target weights of terminals are less than 35 kg for LEO terminal and less than 50 kg for GEO terminal, respectively. In this paper, the current status and outcomes of R&D toward JAXA's next generation optical communication system are reported. The system design of the terminals and studies of critical technologies which are necessary to realize the terminals are performed. As a study of critical technology, a homodyne coherent optical receiver has been developed and successfully operated under Doppler optical carrier shift which is unenviable in GEO-LEO communication links. In addition, JAXA's efforts toward to establish future data relay satellite system are also presented.
{"title":"R&D status of the next generation optical communication terminals in JAXA","authors":"S. Yamakawa, T. Hanada, H. Kohata","doi":"10.1109/ICSOS.2011.5783703","DOIUrl":"https://doi.org/10.1109/ICSOS.2011.5783703","url":null,"abstract":"Optical free space communication is a key element of the future data-relay satellite system which supports space activities, especially in the fields of earth observation satellite programmes and manned flight missions. Aiming to realization of small and light-weight onboard optical terminals, JAXA launched research and development activities in 2008. The terminals have capabilities to enable communication links up to 2.5 Gbps between data relay satellites in GEO and LEO earth observation satellites. The target weights of terminals are less than 35 kg for LEO terminal and less than 50 kg for GEO terminal, respectively. In this paper, the current status and outcomes of R&D toward JAXA's next generation optical communication system are reported. The system design of the terminals and studies of critical technologies which are necessary to realize the terminals are performed. As a study of critical technology, a homodyne coherent optical receiver has been developed and successfully operated under Doppler optical carrier shift which is unenviable in GEO-LEO communication links. In addition, JAXA's efforts toward to establish future data relay satellite system are also presented.","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":"130337857","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}
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