The Current State and the Future Plans of the Satellite Laser Communications

衛星通信システムは,広域性や同報性に優れ,災害 時の緊急回線の提供を可能とするなど,情報通信ネッ トワークにおける重要な役割を果たしている.また最 近では,衛星によるデータ中継や地球の観測,国際宇 宙ステーションにおける滞在や深宇宙領域の探査など, 宇宙を利用する範囲も広がっている.こうした活動の 進展に伴い,宇宙で取り扱われるデータ量も増加し, 例えば衛星による高解像度の撮像データや高分解能な 観測データを迅速に地上へ伝えるといった要求が高ま りつつある.このため,衛星と地上及び衛星間を結ぶ 通信ネットワークの高速化が求められている. 高速な衛星通信ネットワークの実現に重要となる 技術要素として,衛星交換技術及び高速データ通信 技術が挙げられる.衛星交換技術については,これ までに ACTS や iPStar などの衛星が打ち上げられ, ベントパイプ型と再生中継型の交換がそれぞれ実証 された [1], [2].また最近になって,情報通信研究機構 (NICT)が,衛星交換機能と高速データ通信機能とを合 わせもった超高速インターネット衛星(Wideband In-

[1]  Glenn A. Tyler,et al.  Turbulence-induced adaptive-optics performance degradation: evaluation in the time domain , 1984 .

[2]  Robert K. Tyson.  Principles of Adaptive Optics , 1991 .

[3]  Yoshinori Arimoto,et al.  Ground-to-ETS-VI narrow laser beam transmission , 1996, Photonics West.

[4]  James R. Lesh,et al.  Overview of the Ground-to-Orbit Lasercom Demonstration (GOLD) , 1997, Photonics West.

[5]  Louis R. Ignaczak,et al.  The Advanced Communications Technology Satellite - Performance, Reliability and Lessons Learned , 2000 .

[6]  Peter Hamilton,et al.  Two-Way Internet Over iPSTAR Using Advanced Error Correction and Dynamic Links , 2002 .

[7]  Zoran Sodnik,et al.  Preliminary results of the in-orbit test of ARTEMIS with the Optical Ground Station , 2002, SPIE LASE.

[8]  Gotthard Oppenhauser,et al.  In-orbit test result of an operational optical intersatellite link between ARTEMIS and SPOT4, SILEX , 2002, SPIE LASE.

[9]  Bernard L. Edwards,et al.  MLCD: overview of NASA's Mars laser communications demonstration system , 2004, SPIE LASE.

[10]  Nicolas Perlot,et al.  Aperture averaging: theory and measurements , 2004, SPIE LASE.

[11]  Mikhail A. Vorontsov,et al.  Free-space laser communications with adaptive optics: Atmospheric compensation experiments , 2004 .

[12]  L. Deutsch,et al.  Architectural prospects for lunar mission support , 2005 .

[13]  Z. Sodnik,et al.  Long-term statistics of laser beam propagation in an optical ground-to-geostationary satellite communications link , 2005, IEEE Transactions on Antennas and Propagation.

[14]  Z. Sodnik,et al.  Free-Space Laser Communication Activities in Europe: SILEX and beyond , 2006, LEOS 2006 - 19th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

[15]  Zoran Sodnik,et al.  OICETS on-orbit laser communication experiments , 2006, SPIE LASE.

[16]  Hamid Hemmati,et al.  Deep space optical communications , 2006 .

[17]  Werner Klaus,et al.  Ground-to-OICETS laser communication experiments , 2006, SPIE Optics + Photonics.

[18]  N. Perlot,et al.  Results of the optical downlink experiment KIODO from OICETS satellite to optical ground station Oberpfaffenhofen (OGS-OP) , 2007, SPIE LASE.

[19]  Werner Klaus,et al.  Laser Beam Propagation in Ground-to-OICETS Laser Communication Links , 2007 .

[20]  K. Kudielka.  Laser Communications in Space - Applications and Systems , 2007, LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings.

[21]  Katsuyoshi Arai,et al.  Tracking and pointing characteristics of OICETS optical terminal in communication demonstrations with ground stations , 2007, SPIE LASE.

[22]  Zoran Sodnik,et al.  Overview of the inter-orbit and the orbit-to-ground laser communication demonstration by OICETS , 2007, SPIE LASE.

[23]  M. Toyoshima,et al.  Ground-to-satellite laser communication experiments , 2008, IEEE Aerospace and Electronic Systems Magazine.

[24]  Eiji Okamoto,et al.  Results from phase-4 Kirari optical communication demonstration experiments with the NICT optical ground station (KODEN) , 2009 .

[25]  Masahiro Takeoka,et al.  Conceptual designs of onboard transceivers for ground-to-satellite quantum cryptography , 2009, Defense + Commercial Sensing.

[26]  Rolf Meyer,et al.  5.6 Gbps optical intersatellite communication link , 2009, LASE.

[27]  Paul Kolodzy,et al.  Free-space optical communications link budget estimation. , 2010, Applied optics.

[28]  Morio Toyoshima,et al.  Study on the fiber coupling efficiency for ground-to-satellite laser communication links , 2010, LASE.

[29]  S. Shambayati,et al.  Deep-space optical communications , 2011, 2011 International Conference on Space Optical Systems and Applications (ICSOS).