[Laser] Paper about "Free-space optical links for space communication networks"

[Steve J. Noll]

Thanks for the link, Paolo! Happy to see that there is still
some interest here.

I’m just getting back into it after 30 years. Made my first
2-ways in 1979.  Just finished a pair of HackRF One microwave transceivers for
2,3, and 6 GHz and now starting on a pair of optical transceivers. LEDs this
time, not lasers, Vishay VLCS5830 65,000 mcd 624nm 8-degree and VSLY5850 55 mW
6-degree BW at 850 nm. Planning to erect a multi-wavelength IR laser beacon for
receiver testing.

73, Steve WA6EJO


On 12/31/2020 7:27 AM, Paolo Cravero wrote:
> Gentlefolks,
> the list has been silent for a while, so it is time to check if it is still
> working.
>
> Recently I spotted this 66 pages long document about "Free-space optical
> links for space communication networks" (PDF at
> https://arxiv.org/abs/2012.13166). It talks about past, present and future
> of optical communication links. A bit of theory, a bit of math and easy
> graphs, some pictures of real-world applications. I think the booklet is
> also good for the technically inclined newcomers to FSO experiments.
>
> The website linked above ( https://arxiv.org/ )  has a good collection of
> fresh technical papers on many subjects, probably too specific for most
> hobbyists, but that's a good diversion from browsing e-commerce portals :)
>
> Have a nice read,
> Paolo - Italy
>
> PS. The abstract for your convenience:
> "Future spacecraft will require a paradigm shift in the way the information
> is transmitted due to the continuous increase in the amount of data
> requiring space links. Current radiofrequency-based communication systems
> impose a bottleneck in the volume of data that can be transmitted back to
> Earth due to technological as well as regulatory reasons. Free-space
> optical communication has finallyemerged as a key technology for solving
> the increasing bandwidth limitations for space communication while reducing
> the size, weight and power of satellite communication systems, and taking
> advantage of a license-free spectrum. In the last few years, many missions
> have demonstrated in orbit the fundamental principles of this technology
> proving to be ready for operational deployment, and we are now witnessing
> the emergence of an increasing number of projects oriented to exploit space
> lasercommunication (lasercom) in scientific and commercial applications.
> This chapter describes the basic principles and current trends of this new
> technology."
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