I don't know exactly how long gives you too much dispersion (obviously depends on the fiber), but if it's short enough you just don't need to care, indeed.

I don't work with this myself, but my understanding is that you only start ripping this out when you are positive every wavelength from every customer actually has coherent detection, and that could take a while. :-) Obviously this will differ from site to site, too; I would assume new ones don't care unless there's a lot of legacy involved.

Thus going away (see my other comment in the same subthread).

AFAIK yes, but if that's your goal, a far easier solution is to just use transmission standards that don't care about dispersion (coherent detection). E.g., all 100gig transmission already does not care about it.

I made my master thesis on real-time, with a chapter where I experimented with different levels of jitter and latency. Jitter is the consistency of the latency, is it like a locked 66ms or sometimes does it go to 200ms. Jitter is more impactful than latency for a wide range of applications, from gaming to music and video call. Having a lower latency allows for lower jitter, or less jitter while keeping the same latency. Today’s discovery is huge imo.

> I'm sure some HFT traders are going to make an absolute fortune, but I doubt it'll have a huge impact for most other people.

They’ve been using hollow core fiber (and funding research into it) for nearly a decade. I know it goes back further than the 2017 spinoff mentioned in the article, but https://optics.org/news/11/9/52 talks about it a bit.

I generally agree with you, but! Video or audio calls between EU and the US still have a much higher chance of speaking up at the same time and it’s due to lag. If the latency is decreased by 33% it might be a game changer.

Mind-boggling logic, for example any existing roundtrip-heavy application (such as CIFS) would gain visibly and immensely because that latency is multiplicative

online music playing is HEAVILY latency sensitive. (for instance an online jazz session)

then you have online video games. increasing the area where you can get good connections increase quadratically (or more, if we hit step function = big city get in range) the viability of niche multiplayer video games and it is thus a boost to creativity.

there are probably many more niches... (need to think of reachable area, quadratic, instead of 1-to-1 link linear)

> and that is an upper bound

I've often wondered if for HFT or similar it might be worth pointing a particle accelerator at the floor and going for direct-line transit times. I'm fairly sure that this is theoretically possible, but no idea if the engineering challenge is beyond reach for use as a communication link.

HFT traders probably won't make any extra money unless they deploy this first to their dedicated international links.

Almost all of them deploy their strategies within exchange colo's already

What this would do is increase the radius of where you can do some latency constrained thing. If your latency budget is 20ms, you could now do that over a bigger areas.

HFT uses microwaves for anything over distance. Unless this beats microwave latency, this doesn’t do anything for them fwiw

Great for gamers

don't know about truly novel, but CS:GO players certainly would benefit.

Even if directly it isn't technically right to say it's faster, but with it's applications built upon such technology it manifests in these tasks being done faster. Makes sense.

And the time for the lambo and the tractor will depend on the round trips each will have to do, so it depends on the medium.

Someday, someone is finally going to work out how to do comms with neutrinos (which can pass directly through the Earth and come out the other side) and make so much money...