Old 06-24-2011, 10:26 PM #33
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Default Re: 808nm laser visibility

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Originally Posted by honeyx View Post
It also isnīt worth arguing over 80% of the US population is beliving Kanada is an island.
Would love to see where you grabbed the statistics for that statement


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Old 06-24-2011, 10:26 PM #34
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Default Re: 808nm laser visibility

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Sure i have seen it. An you still claim itīs a single wavelenght?
I said they're close enough together that it makes sense to refer to it as one.
If I said HeNe lasers are 632.8nm, would you say "no, they're 632.7992374, 632.799239587234, 632.799234875396, 632.7990945432, 632.80012837..."?
Where I'm from, that's called trolling.

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And how about learning about the difference of the two types of a laserdiode?
There's a lot more than 2, buddy.

"look at it on a spectrum analyser." I did. You were wrong.
"look at it through a diffraction grating." I did. You were wrong.
"But see those wiggles? That's from the laser diode." That's just noise. Here's proof. You were wrong.
"But the human body emits like 3 visible photons. That means laser diodes emit light in the visible spectrum." How you drew that conclusion, I'll never know. You were wrong.
"But this graph has a little spike in the IR" You can't prove that was from the laser, and the diode in that graph is not an IR diode. You were wrong.
"How about this graph?" That graph had a span of 0.0015nm. Hardly enough to push 808nm into the visible. You were wrong.
"Well that can only mean the light is so dim that your spectrometer can't detect it." Well if the spectrometer can't detect it, I probably can't either. And therefore your original claim that the light we see from an 808nm laser diode is in the visible (commonly understood as 400-700nm) is WRONG.

Oh, THEN the backpedaling REALLY starts. "well if I'm wrong about that, then... YOUR COUNTRY SUCKS!"

Laughable. You're not a scientist, you're a politician.



How many more straw men will you make?
How many more times would you like me to own you?
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Old 06-24-2011, 11:12 PM #35
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Default Re: 808nm laser visibility

[QUOTE=Cyparagon;928727]I said they're close enough together that it makes sense to refer to it as one.
If I said HeNe lasers are 632.8nm, would you say "no, they're 632.7992374, 632.799239587234, 632.799234875396, 632.7990945432, 632.80012837..."?
Where I'm from, that's called trolling.



There's a lot more than 2, buddy.
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Originally Posted by Cyparagon View Post
"look at it on a spectrum analyser." I did. You were wrong.
Is your spectrum anyliser good enough to show it up. Prove it!
Quote:
Originally Posted by Cyparagon View Post
"look at it through a diffraction grating." I did. You were wrong.
DId i say that first? YOU are wrong!
Quote:
Originally Posted by Cyparagon View Post
"But see those wiggles? That's from the laser diode." That's just noise. Here's proof. You were wrong.
You mean you show me some noise and thats the proof? You are wrong!
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Originally Posted by Cyparagon View Post
"But the human body emits like 3 visible photons. That means laser diodes emit light in the visible spectrum." How you drew that conclusion, I'll never know. You were wrong.
Where did i say "that means"?? Wrong again!! You are mixing things um and making your own conclusions!! Or at least trying this way to discredit me.
It was just an example for visible light even not being detected by a specturm anylizer and the more seen by passing a defraction grating.

Dont remember ?????
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"But this graph has a little spike in the IR" You can't prove that was from the laser, and the diode in that graph is not an IR diode. You were wrong.
Sure i canīt. But can you prove it was not?? Itīs not an IR laser but a blue one and if you would take at least a look at this forum this guy was mentioning several weavelenghts in the blue area as he was analyzing a blue diode.

Quote:
Originally Posted by Cyparagon View Post
"How about this graph?" That graph had a span of 0.0015nm. Hardly enough to push 808nm into the visible. You were wrong.
Thats true. Its a red laser. However it dosnīt produce a single wavelenght like you are claiming. It was also not a laserdiode but a gaslaser. However. even if the difference of a gaslaser is really small. Maybe within a few Kiloherz. There have been several weavelenghts, not just one. Again you are wrong claimning a laser emits just one wavelenght!

Quote:
Originally Posted by Cyparagon View Post
"Well that can only mean the light is so dim that your spectrometer can't detect it." Well if the spectrometer can't detect it, I probably can't either. And therefore your original claim that the light we see from an 808nm laser diode is in the visible (commonly understood as 400-700nm) is WRONG.
And you are absolutely sure? Obviously not. Else you wouldnīt say yourself " I probably canīt either"
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Oh, THEN the backpedaling REALLY starts. "well if I'm wrong about that, then... YOUR COUNTRY SUCKS!"
Putting me your words in my mouth wont make things better.
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Old 06-24-2011, 11:17 PM #36
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Default Re: 808nm laser visibility

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Putting me your words in my mouth wont make things better.
I'm pretty sure it's not words he's putting in your mouth.



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Old 06-24-2011, 11:18 PM #37
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Default Re: 808nm laser visibility

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Originally Posted by honeyx View Post
Or at least trying this way to discredit me.
Oh, it's done. There's no 'try' here.

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Show me one source that proves that IR laser diodes emit light in the visible spectrum in amounts that we can see, then we'll talk.
Still waiting
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Old 06-24-2011, 11:19 PM #38
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Default Re: 808nm laser visibility

A lesson I had to learn the hard way...

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Old 06-24-2011, 11:26 PM #39
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Default Re: 808nm laser visibility

Me too.



Just wounder people canīt accept a different opinion. Nothing changed since the church were beliving the world is flat not allowing the idea the would could be round.

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Still waiting

Me too. Still not knowing the difference?? Even to lazy to google a bit? If you would know a bit about a Fabry Perot laserdiode this discussion wouldnīt be present.

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Old 06-24-2011, 11:30 PM #40
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Default Re: 808nm laser visibility

808nm looks green to me. Discuss.
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Old 06-24-2011, 11:34 PM #41
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Default Re: 808nm laser visibility

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Me too.



Just wounder people canīt accept a different opinion. Nothing changed since the church were beliving the world is flat not allowing the idea the would could be round.
Infinitus wasn't siding with you on that one, FYI.
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Old 06-25-2011, 12:03 AM #42
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Default Re: 808nm laser visibility

This isn't a matter of opinion. It's a matter of science. It's a matter of the eye's sensitivity not instantaneously ending at a precise point. It's a matter of the composition of the laser die.

It's a matter of you not knowing what the hell you're talking about.

Read until nonsense stops dripping from your mouth.

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Old 06-25-2011, 12:19 AM #43
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Default Re: 808nm laser visibility

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This isn't a matter of opinion. It's a matter of science. It's a matter of the eye's sensitivity not instantaneously ending at a precise point. It's a matter of the composition of the laser die.
True

It's a matter of you not knowing what the hell you're talking about.


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Read until nonsense stops dripping from your mouth.

-Trevor
You mean here the nonsense some of you are spreading?
Yes Iīm reading enought. But prefer other surces that are more trustful rahther a bunch of guys playing with lasers and thinking they know everything about them. Sure there are for sure also members here really having a clue about lasers but itīs for sure not you.

So you or anyone first tell me the difference between a Fabry Perot and a Distributed Feedback Laserdiode. Then you can start to criticize me. Else not.

BTw. I know the difference and you obviously not.Also to lazy to read about it. But not to lazy to critiscize someone else.

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Old 06-25-2011, 12:28 AM #44
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Default Re: 808nm laser visibility

Okay, let's assume for a moment that IR diodes do also emit in the visible spectrum.

We've had 20+ years to figure out how to exploit it. Where is my multiline laser diode?

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Old 06-25-2011, 12:42 AM #45
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Default Re: 808nm laser visibility

There are already prototypes but not on the marked. There are also already prototypes where the beam dosnīt need an extra collimation. So in the future you can expect diodes where no collimation lens is needed. And also diodes with several wavelenghts being amplified. Itīs all due to the amplifiing mirrows and now they found a way how to do that. We just have to wait a bit till this new technology will be mainstream.

Then you will have a laser with a very thin beam and with a very big photon density.

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Old 06-25-2011, 12:44 AM #46
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Default Re: 808nm laser visibility

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Infinitus wasn't siding with you on that one, FYI.
Yup, I wasn't.... I've been following the thread though.
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Old 06-25-2011, 12:52 AM #47
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Default Re: 808nm laser visibility

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There are already prototypes but not on the marked. There are also already prototypes where the beam dosnīt need an extra collimation. So in the future you can expect diodes where no collimation lens is needed. And also diodes with several wavelenghts being amplified. Itīs all due to the amplifiing mirrows and now they found a way how to do that. We just have to wait a bit till this new technology will be mainstream.

Then you will have a laser with a very thin beam and with a very big photon density.
Lasers that don't need collimation? Those are lasers with long cavities, like HeNe's.

Lasers with a thin beam and "big photon density?" That's all lasers, chief.

"Amplifying mirrors?" Hm, that would be all lasers. Again.

So, I asked about multiline laser diodes based on your phantom visible emissions in infrared diodes. You said there are prototypes. So, where are they?

[citation needed]

-Trevor
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Old 06-25-2011, 01:02 AM #48
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Default Re: 808nm laser visibility

Iīm actually speaking about laserdiodes. Not gaslasers. Was reading an article about that a feew weeks ago. But it was german so I have to find it first an translate for you. Will take a look tomorrow as iīm going to bed now. If i find it, i will post it.
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