Old 03-08-2017, 12:51 AM #17
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Default Re: Coldest Operating Temp for Lasers

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Originally Posted by Cyparagon View Post
Right. I'll try again: Let me know if I have this straight:

So. To summarize this thread:

lasercutter: "Can I have some application answers?"
others: "Can you provide application info?"
lasercutter: "No."
others: "Then that's not a fair request, is it?"
lasercutter: "You people are the worst."
Excellent summary of the important points--pretty much the size of it.

The guy did get useful advice actually.
These self-aggrandized types all seem to think LFP will automatically babysit their daydreams about lasers ---then do the work to spoon feed them answers and corrections to avoid any real work, knowledge, or experience of their part. Go figure.

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Old 03-08-2017, 12:54 AM #18
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Default Re: Coldest Operating Temp for Lasers

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Originally Posted by steve001 View Post
Yes it's possible this person can't go into details because they are not allowed to. I worked at such a place, Johns Hopkins Applied Physics Laboratory. I know some of the odd posts you refer to, but asking the question this poster asked seems innocuous. However, it does seem odd that whomever he is working for doesn't have engineers that would know. Perhaps it's a small company in development of a process under contract.
That's why I suspect foul play here. It's not that such companies and labs don't exist, but anybody with enough expertise to work there should already know the answers to questions such as this. That and how he immediately started insulting highly reputable members and the forum in general
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Old 03-08-2017, 01:24 AM #19
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Default Re: Coldest Operating Temp for Lasers

If you're operating the laser in space then it's not going to stay at -100F for very long. I'd honestly be more worried abut the laser getting too hot as opposed to too cold.

Since photons refract differently depending on their energy, wavelength shifts caused by going from -100F to 100F will likely cause defocusing, so you probably won't be able to burn things from 1.5m away unless you design your focusing optics with this in mind.
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Old 03-08-2017, 01:32 AM #20
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Default Re: Coldest Operating Temp for Lasers

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Originally Posted by steve001 View Post
Yes it's possible this person can't go into details because they are not allowed to. I worked at such a place, Johns Hopkins Applied Physics Laboratory.
As you mentioned briefly, any such facility would have experts to consult. They're doomed to failure if their engineering team has resorted to asking a public internet forum about something as trivial as thermal shock... or the operating temperatures of its own equipment.
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Old 03-08-2017, 01:39 AM #21
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Default Re: Coldest Operating Temp for Lasers

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Originally Posted by Cyparagon View Post
As you mentioned briefly, any such facility would have experts to consult. They're doomed to failure if their engineering team has resorted to asking a public internet forum about something as trivial as thermal shock... or the operating temperatures of its own equipment.
My guess is (if it's even a real question) a highschool or personal project. I highly doubt any professional organization would be using bulk diode lasers for long-range cutting purposes anyway.

lasercutter, if by some chance you actually are part of a real organization, in the future don't refer to public forums for this kind of information. Just call the manufacturer.
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Old 03-08-2017, 02:21 AM #22
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Default Re: Coldest Operating Temp for Lasers

Lasercutter=sockpuppet?

Something sounds familiar here...........
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Old 03-08-2017, 02:38 AM #23
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Default Re: Coldest Operating Temp for Lasers

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Originally Posted by H2Oxide View Post
If you're operating the laser in space then it's not going to stay at -100F for very long. I'd honestly be more worried abut the laser getting too hot as opposed to too cold.

Since photons refract differently depending on their energy, wavelength shifts caused by going from -100F to 100F will likely cause defocusing, so you probably won't be able to burn things from 1.5m away unless you design your focusing optics with this in mind.
A typo. The working distance is 1.5 inches
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Old 03-08-2017, 03:10 AM #24
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Default Re: Coldest Operating Temp for Lasers

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Originally Posted by steve001 View Post
A typo. The working distance is 1.5 inches
Ah.

That makes it less of an issue then.
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Old 03-08-2017, 12:49 PM #25
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Default Re: Coldest Operating Temp for Lasers

I understood that the plastic he wants to cut
is 1.5" thick. I may have read that wrong. If
so how thick is the plastic he wants to cut at
a distance of 1.5" ?

If he was working for a company that had a
covert contract he could have said so...

He's probably a guy that has an idea that he
thinks is the next Sliced Bread invention that
will make him rich.

Jerry
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Old 03-08-2017, 01:23 PM #26
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Default Re: Coldest Operating Temp for Lasers

I have seen that kind of thing before, someone comes in here and wants help, but doesn't want to expose their great idea.
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Old 03-08-2017, 11:48 PM #27
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Default Re: Coldest Operating Temp for Lasers

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I have seen that kind of thing before, someone comes in here and wants help, but doesn't want to expose their great idea.
I don't really have a problem with that kind of thing. I'm all for developing stuff on your own, and I don't really care whether or not they want to tell me what it's for or not. (with the exception of possible malicious intent)

The only person he hurts by not revealing information is himself.
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Old 03-09-2017, 12:22 AM #28
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Default Re: Coldest Operating Temp for Lasers

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I will be performing quite a few experiments to prove out the laser feasibility
If you're trying to test the diode then why are you asking us for the answers? Do the test yourself and find out.

edit: You're nothing but a damn troll leave the forum alone.
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Old 03-09-2017, 12:25 AM #29
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Default Re: Coldest Operating Temp for Lasers

They're gone.
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