LLCD operations using the Optical Communications Telescope Laboratory (OCTL)

Biswas, Abhijit; Kovalik, J.; Wright, Malcolm W.; Roberts, W. T.; Cheng, Michael; Quirk, Kevin J.; Srinivasan, M.; Shaw, Matthew D.; Birnbaum, Kevin

doi:10.1117/12.2044087

Cited by 20 publications

(16 citation statements)

References 3 publications

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“…As reported in ref. 6 zero errors were detected most of the time. During the pass, limited concurrent processing was performed by reading blocks of stored data to estimate the slot-clock frequency so that the reception of pulse-position modulation signal at the expected downlink data-rate could be verified in near real-time.…”

Section: A Llot Receivermentioning

confidence: 97%

Optical Communications Telescope Laboratory (OCTL) Support of Space to Ground Link Demonstrations

Biswas

Kovalik

Wright

et al. 2014

SpaceOps 2014 Conference

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The NASA/JPL Optical Communication Telescope Laboratory (OCTL) was built for dedicated research and development toward supporting free-space laser communications from space. Recently, the OCTL telescope was used to support the Lunar Laser Communication Demonstration (LLCD) from the Lunar Atmospheric Dust Environment Explorer (LADEE) spacecraft and is planned for use with the upcoming Optical Payload for Lasercomm Science (OPALS) demonstration from the International Space Station (ISS). The use of OCTL to support these demonstrations is discussed in this report. The discussion will feed forward to ongoing and future space-to-ground laser communications as it advances toward becoming an operational capability.

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Section: A Llot Receivermentioning

confidence: 97%

Optical Communications Telescope Laboratory (OCTL) Support of Space to Ground Link Demonstrations

Biswas

Kovalik

Wright

et al. 2014

SpaceOps 2014 Conference

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“…Another enabling factor for space-based lasercom systems is the development of a geographically diverse ground station network to ensure reliability of access, because weather can temporarily block transmission of optical signals. Previous laser communication demonstrations have used large ground receive telescopes, such as OCTL 63 or several smaller apertures, such as lunar lasercom ground terminal (LLGT). 29,64 Such terminals, which also tend to use very sensitive detectors, such as superconducting nanowire single-photon detectors, are expensive to build and maintain, and fielding enough ground stations to support a mission's desired availability may prove prohibitively expensive.…”

Section: Key Enabling Technologiesmentioning

confidence: 99%

Nanosatellite optical downlink experiment: design, simulation, and prototyping

et al. 2016

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The nanosatellite optical downlink experiment (NODE) implements a free-space optical communications (lasercom) capability on a CubeSat platform that can support low earth orbit (LEO) to ground downlink rates > 10 Mbps. A primary goal of NODE is to leverage commercially available technologies to provide a scalable and cost-effective alternative to radio-frequency-based communications. The NODE transmitter uses a 200-mW 1550-nm master-oscillator power-amplifier design using power-efficient M-ary pulse position modulation. To facilitate pointing the 0.12-deg downlink beam, NODE augments spacecraft body pointing with a microelectromechanical fast steering mirror (FSM) and uses an 850-nm uplink beacon to an onboard CCD camera. The 30-cm aperture ground telescope uses an infrared camera and FSM for tracking to an avalanche photodiode detector-based receiver. Here, we describe our approach to transition prototype transmitter and receiver designs to a full end-to-end CubeSat-scale system. This includes link budget refinement, drive electronics miniaturization, packaging reduction, improvements to pointing and attitude estimation, implementation of modulation, coding, and interleaving, and ground station receiver design. We capture trades and technology development needs and outline plans for integrated system ground testing.

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“…Superconducting nanowire single-photon detectors (SNSPDs) [1] developed for near-infrared wavelengths are an exciting detector technology capable of efficiency exceeding 90% at 1550 nm [2], timing jitter below 5 ps [3], and dark count rates at a few counts per second [4]. By exploiting these properties, SNSPDs have enabled laboratory experiments of quantum sciences [4,5], improved quantum key distribution [6], and demonstrated optical communication from satellites [7]. Despite laboratory and commercial successes, there are still unresolved questions regarding the fundamental B J. P. Allmaras…”

Section: Introductionmentioning

confidence: 99%

Thin-Film Thermal Conductivity Measurements Using Superconducting Nanowires

et al. 2018

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We present a simple experimental scheme for estimating the cryogenic thermal transport properties of thin films using superconducting nanowires. In a parallel array of nanowires, the heat from one nanowire in the normal state changes the local temperature around adjacent nanowires, reducing their switching current. Calibration of this change in switching current as a function of bath temperature provides an estimate of the temperature as a function of displacement from the heater. This provides a method of determining the contribution of substrate heat transport to the cooling time of superconducting nanowire single-photon detectors. Understanding this process is necessary for successful electrothermal modeling of superconducting nanowire systems.Keywords Thermometry · Superconductor · Nanowire IntroductionSuperconducting nanowire single-photon detectors (SNSPDs) [1] developed for near-infrared wavelengths are an exciting detector technology capable of efficiency exceeding 90% at 1550 nm [2], timing jitter below 5 ps [3], and dark count rates at a few counts per second [4]. By exploiting these properties, SNSPDs have enabled laboratory experiments of quantum sciences [4,5], improved quantum key distribution [6], and demonstrated optical communication from satellites [7]. Despite laboratory and commercial successes, there are still unresolved questions regarding the fundamental B J. P. Allmaras

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LLCD operations using the Optical Communications Telescope Laboratory (OCTL)

Cited by 20 publications

References 3 publications

Optical Communications Telescope Laboratory (OCTL) Support of Space to Ground Link Demonstrations

Optical Communications Telescope Laboratory (OCTL) Support of Space to Ground Link Demonstrations

Nanosatellite optical downlink experiment: design, simulation, and prototyping

Thin-Film Thermal Conductivity Measurements Using Superconducting Nanowires

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