&lt;title&gt;Overview of the Optical Communications Demonstrator&lt;/title&gt;

Chen, Chien‐Chung; Lesh, James R.

doi:10.1117/12.184687

Cited by 33 publications

(10 citation statements)

References 2 publications

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“…Because of difference of requirement and background of laser communication link, this system is different to those programme such as SILEX [2] , LUCE [3] , OCD [4] , STVR-2 [5] and so on. Some special considerations are indicated as follows: 1) Although the influence of the flight height of the plane is of little importance to the communication distance, but the overall system performance is influenced to some aspects:①When aircraft fly from troposphere to stratosphere, the attitude stabilization will be greatly increased because the vibration caused by atmosphere is greatly decreased；②The communication channel only penetrate 10% of the whole atmosphere, and the absorption loss is less than 5% when height over 10000m; ③The influence of the turbulence and flickering on the distortion of the laser light beam is greatly decreased while flight height is keep increasing, so the precision of the APT system can be increased.…”

Section: System Analycementioning

confidence: 99%

Study on APT subsystem in optical communication link between the GEO and airplane

Tong

Zhi

et al. 2004

SPIE Proceedings

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In this paper, the matching between some key performance parameters such as field of view, optical aperture, control bandwidth and engineering issues including weight, power, volume, lift time in APT subsystem of optical communication link are analyzed and discussed in detail according to the requirement of BER, communication distance, platform jitter, background light intensity and other system parameters, the two communicaiton terminal carrier are the GEO satellite and airplane. The goal of the system is to fulfill optical communication at data rates of 622Mb/s from aircraft at the altitudes of 10000~25000 m to another terminal mounted on satellite on the orbit of GEO, they are 40000km away from each other. Communication error rates is better than 6 10 − ; the airborne terminal must be able to operate within temperature ranges of 65 − ℃ to +55 ℃ and be able to survive in humidity.

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Section: System Analycementioning

confidence: 99%

Study on APT subsystem in optical communication link between the GEO and airplane

Tong

Zhi

et al. 2004

SPIE Proceedings

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“…The architecture of the terminal is based on the design of the Optical communications Demonstrator (OCD), an earlierdeveloped laboratory engineering model terminal [Ref. [1][2][3][4][5][6]. Light from the beacon signal, or the target science image if used in the science imaging mode, is received by the telescope (shown by the clear arrow), passed by beamsplitters I and 2 (BS 1 and BS2), and is detected by the Focal Plane Array (FPA).…”

Section: Optical Communications Terminalmentioning

confidence: 99%

<title>Laser communications terminal for the X2000 series of planetary missions</title>

Hemmati

Lesh

1998

SPIE Proceedings

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A new program called the Advanced Deep-Space Systems Development Program (a.k.a. X2000 Program) has been initiated to develop new cutting-edge technologies for NASA's deep-space missions in an overall flight project environment. Several technologies have been selected for development under the first delivery of the X2000 Program. Optical communications is one of those technologies. This paper provides an overview of the X2000 Program and describes the optical communications terminal that will be developed therein. The spacecraft terminal will be a multi-function instrument, capable of not only two-way communications from distances out to Europa (Jupiter), but two-way ranging, science imaging and laser altimeter reception as well. The plan for the development of the terminal is also described.

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“…Numerous papers describing the OCD design, construction, assembly and integration were published over the last few years [2,3]. In this paper, we present the latest results from OCD performance measurements, particularly the characterization of the fine tracking function.…”

Section: Introductionmentioning

confidence: 99%

<title>Lessons learned from the Optical Communications Demonstrator (OCD)</title>

et al. 1999

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The Optical Communications Demonstrator (OCD) is a laboratory based lasercom terminal that was developed to validate several key technologies such as precision beam pointing, high bandwidth beacon tracking and beacon acquisition. The unique architecture of OCD uses a single focal plane array (FPA) and a single fine steering mirror ( FSM) for beacon acquisition, beacon tracking and point-ahead compensation. A fiber-coupled laser transmitter further reduces the complexity of the terminal. Over the last year, system level integration, test and characterization of the terminal were conducted. Here we present results from the integration and test (I&T) of the terminal with the Lasercom Terminal Evaluation Station (LTES), with particular emphasis on the fine tracking performance. Furthermore, we will describe lessons learnt from the implementation and testing of OCD that are relevant to the design of future flight optical communication terminals. The completed OCD is now being used in a series of ground-ground experiments to understand atmospheric effects and to gain experience operating the OCD.

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<title>Overview of the Optical Communications Demonstrator</title>

Cited by 33 publications

References 2 publications

Study on APT subsystem in optical communication link between the GEO and airplane

Study on APT subsystem in optical communication link between the GEO and airplane

<title>Laser communications terminal for the X2000 series of planetary missions</title>

<title>Lessons learned from the Optical Communications Demonstrator (OCD)</title>

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