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Old 11-23-2014, 09:48 PM #17
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Default Re: Why can't 980nm be frequency-doubled?

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Originally Posted by Atomicrox View Post
Not very useful, but relevant to the topic: Confirmed cheap multi-line 980nm/490nm pen

rhd, do you also have a source for the 495nm or was that a one of a kind?
Yes, and also yes.

My 495 was a one of a kind / non repeatable. But there are now commercial sources for 490 ish range diodes, and they're a bit over $1k.


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Old 11-23-2014, 10:06 PM #18
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Default Re: Why can't 980nm be frequency-doubled?

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Originally Posted by rhd View Post
Yes, and also yes.

My 495 was a one of a kind / non repeatable. But there are now commercial sources for 490 ish range diodes, and they're a bit over $1k.
Yet you still haven't shared any links...
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Old 11-23-2014, 11:49 PM #19
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Default Re: Why can't 980nm be frequency-doubled?

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Originally Posted by rhd View Post
Yes, and also yes.

My 495 was a one of a kind / non repeatable. But there are now commercial sources for 490 ish range diodes, and they're a bit over $1k.
Good to know, thanks!
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Old 11-24-2014, 12:15 AM #20
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Default Re: Why can't 980nm be frequency-doubled?

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Yet you still haven't shared any links...
That's a factually correct observation. Good job.

Not everything is a "link" that can (or should be) plopped into a forum. You've been here long enough that you should understand that.

Are you trying to purchase a diode? Because if so, you can just say so directly, and I'm generally very willing to help people out. There's no need to be obnoxious about it and imply that either I'm lying, or I'm trying to keep something fantastic from you.

But if you're serious, and that sticker shock doesn't scare you away (it scares me away, I haven't purchased one), just ask, I'll help you buy a 490. I would strongly advise against it though. Why spend over $1k now for a single mode 490 when we seem to be on a trend of new low cost diodes popping up in the InGaN wavelength range every couple months? But if you want one, PM me. I'll help you buy it.
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Old 11-24-2014, 12:52 AM #21
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Default Re: Why can't 980nm be frequency-doubled?

Not at all implying you are lying. When you say "commercially available," one would be led to believe its not some big secret. I simply wanted a link so I could check out said diodes data no need to be harsh.

And you are right I dont want to buy one. Read above
Speaking of new diodes, when are those darned osrams going to pop up...
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Old 11-24-2014, 01:24 AM #22
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Default Re: Why can't 980nm be frequency-doubled?

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Originally Posted by crazyspaz View Post
Not at all implying you are lying. When you say "commercially available," one would be led to believe its not some big secret. I simply wanted a link so I could check out said diodes data no need to be harsh.

And you are right I dont want to buy one. Read above
Speaking of new diodes, when are those darned osrams going to pop up...
Our hobbyist community is not "commercial", we're recreational. Saying something is commercially available doesn't mean there's a nice convenient eBay link, or that it's stocked in DTR's shop, or that you can order it from o-like. A lot of distributors make items commercially available, but won't sell to the hobby community or end users (or at least try not to do so intentionally).

Which OSRAMs?
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Old 11-24-2014, 01:33 AM #23
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Default Re: Why can't 980nm be frequency-doubled?

Right, but that isnt always the case. No hard feelings, I hope
The PLT-5 488 is what I was referring to. Supposedly will be low cost. 60mw of SM 488 for cheap sounds good to me, dunno bout you
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Old 11-24-2014, 02:46 AM #24
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Default Re: Why can't 980nm be frequency-doubled?

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Originally Posted by crazyspaz View Post
Right, but that isnt always the case. No hard feelings, I hope
The PLT-5 488 is what I was referring to. Supposedly will be low cost. 60mw of SM 488 for cheap sounds good to me, dunno bout you
That's the diode that costs a bit over $1k right now
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Old 11-24-2014, 04:45 PM #25
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Default Re: Why can't 980nm be frequency-doubled?

Yes, those direct laser diodes >490 nm are available.
No, I don't sell them.

To the topic question: yes, it is possible. Not an easy task. A simple direct pump of the nonlinear crystal does not yield a lot. Necessary to make a resonant cavity with the crystal inside. Other possibility is with a very special periodically poled LN (Lithium Niobate) waveguide though driving costs very high.
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