Testing of a compact 10-Gbps Lasercomm system for maritime platforms

Juarez, Juan C.; Souza, Katherine T.; Nicholes, Dustin D.; Riggins, James L.; Tomey, Hala J.; Venkat, Radha A.

doi:10.1117/12.2273101

Laser Communication and Propagation Through the Atmosphere and Oceans VI 2017

DOI: 10.1117/12.2273101

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Testing of a compact 10-Gbps Lasercomm system for maritime platforms

Juan C. Juarez

Katherine T. Souza

Dustin D. Nicholes

et al.

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Cited by 2 publications

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Fiber bundle-based beam tracking approach for free space optical communications link optimization

Patel,

O’Toole,

Newell

et al. 2024

Opt. Eng.

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A robust pointing, acquisition, and tracking approach is critical to closing and maintaining a free space optical communications link. Many fiber-coupled terminal architectures use a beamsplitter to direct a portion of the received light onto a quadrant detector and generate an error signal. A feedback control loop uses this error signal to adjust a fine steering element to maximize power into the collection fiber. However, this approach produces additional insertion loss due to transmission through a beamsplitter and tracking loss due to inevitable boresighting errors between the quadrant detector and the collection fiber. We present an alternative architecture that makes use of a hexagonally packed, seven-fiber bundle for data beam tracking. The outer fibers are inherently co-boresighted position sensors used to sense displacement of the received beam from the central data fiber. We present field test data directly comparing performance between a fiber bundle-based terminal and a quadrant detector-based terminal. Our results show nearly an order of magnitude of improvement in control loop tracking stability and a 2.8× improvement in tracking performance as seen in Strehl ratio for the fiber bundle system.

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Fiber bundle-based beam tracking approach for free space optical communications link optimization

Patel,

O’Toole,

Newell

et al. 2024

Opt. Eng.

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Adaptive optics model characterizing turbulence mitigation for free space optical communications link budgets

Stotts

Andrews

2021

Opt. Express

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Free-space optical communications (FSOC) is becoming an important option for both atmospheric and space-based high data rate networks. Long-range, mobile FSOC links in the former environments must mitigate the effects of turbulence if they are to provide reliable, high link availability under cloud-free atmospheric conditions. Adaptive optics (AO) has been proposed as one means of reducing link degradation in turbulence, but field validated AO performance models are few and not definitive. These models are important if credible FSOC high performance links are expected to be deployed using AO systems. This paper reviews the Strehl ratio for the Andrews AO model and provides comparisons between predicted AO-based FSOC link budgets and measured link performance derived from several field trials. These results suggest that AO systems perform well under weak turbulence or short range under 10 km, but only offer limited tip/tilt gain in moderate turbulence and no gain under high/saturation regime turbulence at longer ranges. Long range links close to the ground in high moderate turbulence may degrade AO performance further.

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Testing of a compact 10-Gbps Lasercomm system for maritime platforms

Cited by 2 publications

References 4 publications

Fiber bundle-based beam tracking approach for free space optical communications link optimization

Fiber bundle-based beam tracking approach for free space optical communications link optimization

Adaptive optics model characterizing turbulence mitigation for free space optical communications link budgets

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