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Old 11-17-2012, 10:38 PM #1
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Default multi wavelength 200mw diodes.

I have 3 of these diodes that I would assume are brand new since they are still in package and have no solder on the connection posts. That being said they have been opened. I am not sure what they are worth so make an offer and please be honest I am trusting my fellow lpf members not to totally low ball me but I am not expecting to sell these for full price. Will take Paypal or U.S. Postal money orders only.
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Old 11-18-2012, 03:32 AM #2
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Default Re: multi wavelength 200mw diodes.

It is a little hard to tell from the picture, but do you know if these are the standard 5.6mm diodes we typically use, or a 9mm diode? They look a little big compared to the text, but that isn't an accurate frame of reference.
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Old 11-18-2012, 04:31 AM #3
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Default Re: multi wavelength 200mw diodes.

Here ya go
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Old 11-18-2012, 05:53 AM #4
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Default Re: multi wavelength 200mw diodes.

Burro: can you explain what you mean by "multi wavelength" ?
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Old 11-18-2012, 05:59 AM #5
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Default Re: multi wavelength 200mw diodes.

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Burro: can you explain what you mean by "multi wavelength" ?
I think they are the IR/Red diodes from DVD drives.
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Old 11-18-2012, 06:36 AM #6
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Default Re: multi wavelength 200mw diodes.

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Originally Posted by ARGLaser View Post
I think they are the IR/Red diodes from DVD drives.
I'd like Burro to explain his meaning, to be honest. Seller should be clear about this.

If he's just calling them "multi wavelength" because there is a RANGE indicated on the PACKAGING, instead of one singular wavelength, that's ridiculous.
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Old 11-18-2012, 03:37 PM #7
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Default Re: multi wavelength 200mw diodes.

Chances are that's what he meant by "multi-wavelength".
I'd probably make the same mistake if I were new to lasers too, just saying
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Old 11-18-2012, 05:49 PM #8
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Default Re: multi wavelength 200mw diodes.

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Originally Posted by rhd View Post
Burro: can you explain what you mean by "multi wavelength" ?
I said this because the package had a range on it and I have no way of testing the actual output wave length and rather then state a a specific wavelength and then a customer get pissed at me when it's different than stated I simply covered myself by saying multi wavelength. If you can enlighten me about something I did wrong then by all means please do so. I'm not perfect and am always willing to learn from a mistake.
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Old 11-19-2012, 03:37 AM #9
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Default Re: multi wavelength 200mw diodes.

Well, a multi-wavelength diode is sort of an undefined concept, they don't really exist.

With that said, there are a few real items that could fit the description, without being totally incorrect. For example:
- Diodes that have two emitters in the same physical can / package.
- Diodes that vary their wavelength based on heat or current (most diodes do).
- LED'd diodes. I've seen some emit multiple wavelengths. Though arguably this is no longer a laser diode.

While the above could arguably fit the "multiple wavelength" classification, I don't think any of those options describes the items you've come across. What you have is very likely just a diode with a specific wavelength, that for practical packaging purposes, they've labelled as falling within a range. It's a fairly wide range too.

One of the tip-offs that the range isn't actually an indication of anything fancy, is the bottom end. 620nm is not a wavelength that really exists in diode based lasers, outside of some very expensive ($750+) parts that require extensive cooling.
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Old 11-19-2012, 04:07 AM #10
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Default Re: multi wavelength 200mw diodes.

Ok so what do I have and what are they worth? And thanks for the clarification. I really appreciate it.
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Old 11-19-2012, 04:15 AM #11
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Default Re: multi wavelength 200mw diodes.

Quote:
Originally Posted by burro breath View Post
Ok so what do I have and what are they worth? And thanks for the clarification. I really appreciate it.
You'd have to give us more information. Based on what you've told us, and what's in the photos, we can't tell.

It could be 3x 808nm diodes, in which case you'd have a dollar or two's worth of diodes. But if they were 3x low 630nm diodes from some fancy set of gear, then it could be worth thousands.

The most reasonable guess I'd make is that you have 3x of a 660 or 670nm diode, which would be worth $3 or $4 each. But I'm not basing that on anything other than simply what's the most common to come across.

Where did you get them ?
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Last edited by rhd; 11-19-2012 at 04:16 AM.
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Old 11-19-2012, 03:57 PM #12
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Default Re: multi wavelength 200mw diodes.

Quote:
Originally Posted by rhd View Post
You'd have to give us more information. Based on what you've told us, and what's in the photos, we can't tell.

It could be 3x 808nm diodes, in which case you'd have a dollar or two's worth of diodes. But if they were 3x low 630nm diodes from some fancy set of gear, then it could be worth thousands.

The most reasonable guess I'd make is that you have 3x of a 660 or 670nm diode, which would be worth $3 or $4 each. But I'm not basing that on anything other than simply what's the most common to come across.

Where did you get them ?
i got them from my work. they were throwing out alot of the stuff they didnt need from when the company was bought from its parent company. the parent company did alot of work in the high powered laser field as well as precision manufacturing of specialty laser optics for telacomunications. i seriously doubt they are the diodes that are worth a few thousand dollars because they were just going to throw them out. it would be nice if they were so i could help out my folks pay for my tuition for college but like i said i doubt im this lucky. the company gave me the diodes about a thousand feet of single mode fiberoptic cable an lmp some multiwavelength led diodes from digikey and alot of 1/4 wave coated windows and lenses for lasers. all the lenses are bnib. i am trying to figure out what all of this stuff is worth but am unsure of where to go. how can i find out what type of diodes i have? i also have a bnib fiber coupled diode.sorry if these are al very frustrating questions because im a novice im just trying to soak up as much info as i can.
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