Deep space optical communications (DSOC) beam expander design and engineering

Driscoll, D. C.; Zellers, Brian; Schomacker, J.; Carro, Joseph; Roberts, W. T.; MacDonald, Dan; Guregian, J.; Klipstein, William

doi:10.1117/12.2546678

Cited by 4 publications

(5 citation statements)

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“…The DSOC FLT [6] optical transceiver assembly (OTA) [7] manufactured at L3Harris-ISR North-SSG [8] has a 1550 nm transmit channel interfaced to a 4 W laser transmitter over a connectorized single mode fiber. A piezoelectrically driven fast steering mirror (FSM), manufactured by Cedrat Technologies, in the transmit path implements downlink point-ahead angles.…”

Section: Flight Laser Transceiver (Flt)mentioning

confidence: 99%

Deep space optical communications technology demonstration

Biswas,

Srinivasan,

Andrews

et al. 2024

Free-Space Laser Communications XXXVI

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The National Aeronautics and Space Administration's (NASA) Deep Space Optical Communications (DSOC) payload, launched with the Psyche spacecraft on October 13, 2023, is facilitating an ongoing technology demonstration (TD) of free-space optical communications (FSOC), from beyond the earth-moon system. The DSOC flight laser transceiver (FLT), can acquire a 1064 nm uplink laser from earth, and return a 1550 nm, serially concatenated pulse position modulated (SCPPM) signal, to earth. The FLT uses a 22 cm diameter unobscured optical transceiver assembly, coupled to a 4 W average power laser transmitter, supplemented with actuators, sensors, electronics and software. A 5-7 kW average power, multi-beam 1064 nm uplink laser assembly integrated to the Optical Communications Telescope Laboratory (OCTL) near Wrightwood, CA serves as the Ground Laser Transmitter (GLT). The DSOC Ground Laser Receiver (GLR) at the Palomar Observatory, Hale telescope (operated by Caltech Optical Observatories), consists of a superconducting nanowire single photon detector (SNSPD) array, connected to a ground signal processing assembly. Signal photon arrivals are detected and processed to extract information codewords at the GLR. A Mission Operations System (MOS) co-located with the Psyche Project Mission Operations Center, at the Jet Propulsion Laboratory (JPL), coordinates DSOC technology demonstration activities. This paper presents a system overview, mission description and operations architecture for the TD. Early results that include downlink at maximum downlink data-rate of 267 Mb/s from 0.37 astronomical units (AU) or 55 million kilometers are presented.

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Section: Flight Laser Transceiver (Flt)mentioning

confidence: 99%

Deep space optical communications technology demonstration

Biswas,

Srinivasan,

Andrews

et al. 2024

Free-Space Laser Communications XXXVI

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“…The increasing complexity of any of them increases the necessity of numerical methods to model the problem. A summary of the different commercial software available to model opto-thermo-mechanical problems is presented by Heijmans et al 101 An example of a complete STOP analysis done by combining the methods presented in this section is given by Driscoll et al 102 for the beam expander telescope onboard the NASA Psyche DSOC mission. The STOP analysis performed enables the calculation of the permitted WFE to maintain the beam divergence required below 14.5 μrad over a temperature range of 80°C.…”

Section: Stress Birefringence Of the Optical Refractive Componentsmentioning

confidence: 99%

“…Requirements on the maximum WFE for FSOC are dependent on the specific link parameters but usually WFE rms < λ∕30 for the on-axis field of view and WFE rms < λ∕15 for the whole field of view are a good rule of thumb for a preliminary terminal design in the wavelengths used in FSOC. 102,112,113 As explained in Sec. 3.2, the laser beam itself can induce thermo-elastic deformations in optical microcomponents without enough thermal sinking, such as the microelectromechanical mirrors.…”

Section: Transmitter Wavefront Errormentioning

confidence: 99%

“…A summary of the different commercial software available to model opto-thermo-mechanical problems is presented by Heijmans et al 101 . An example of a complete STOP analysis done by combining the methods presented in this section is given by Driscoll et al 102 . for the beam expander telescope onboard the NASA Psyche DSOC mission.…”

Section: Opto-thermo-mechanical Phenomenamentioning

confidence: 99%

“…Requirements on the maximum WFE for FSOC are dependent on the specific link parameters but usually WFErms<λ/30 for the on-axis field of view and WFErms<λ/15 for the whole field of view are a good rule of thumb for a preliminary terminal design in the wavelengths used in FSOC 102 , 112 , 113…”

Section: Impact Of Opto-thermo-mechanical Phenomena On Fsocmentioning

confidence: 99%

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Opto-thermo-mechanical phenomena in satellite free-space optical communications: survey and challenges

Badás,

Piron,

Bouwmeester

et al. 2023

Opt. Eng.

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Growing interest in free-space optical communication, due to the high bandwidth and security provided by these links, has generated the necessity of designing high-performance satellite terminals. In order to develop these terminals, the optothermo-mechanical phenomena that appear in the space environment and their effect on optical communication links have to be understood in detail. A review of the opto-thermo-mechanical phenomena occurring in spaceborne terminals is presented, describing the relevance of each of them. The methods found to compute the impact on the communication performance due to opto-thermo-mechanical phenomena are collected by building the bridge between the optical and communication performance parameters. Finally, techniques available to mitigate the detrimental effects of these phenomena are classified, and the relevant research challenges are identified.

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