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Why Haven't We Seen Handhelds of These Yet?

Wolfman29

Wolfman29

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Hey everyone.

Just doing some laser thinking, and I have come to the conclusion that we should be seeing expensive, yet viable, handhelds in the form of these wavelengths:

689nm - 1319nm + 1444nm
664nm - 1319nm + 1338nm
659.5nm - 1319nm + 1319nm
632nm - 1122nm + 1444nm
612.5nm - 1064nm + 1444nm
610nm - 1122nm + 1338nm
606nm - 1122nm + 1319nm
571.5nm - 946nm + 1444nm
561nm - 1123nm + 1123nm (easy? Just normal frequency doubling...)
554nm - 946nm + 1338nm
551nm - 946nm + 1319nm
546nm - 1064nm + 1122nm
513nm - 946nm + 1122nm
500nm - 946nm + 1064nm

The reason why I say we should be able to get handhelds in these is that three of the wavelengths that aren't easy to produce, 946nm (becomes a "quasi-three level gain medium", which means its harder to pump), 1319nm, which is not a hugely powerful line of emission, and 1342nm, which is one of the weaker lines of emission of Nd:YAG, are found in three of the four common DPSS laser handhelds (473nm, 589nm, and 593.5nm).

The point of the matter is, why is it so "easy" (relatively speaking, considering these other wavelengths) to make handhelds out of 473nm, 589nm, and 593.5nm (!) while we cannot make one that is at, say, 546nm (two of the stronger lines of Nd:YAG - 1064nm and 1123nm).

And you know what? Those are just the five or so strongest lasing lines of Nd:YAG. There are tons more - if you are curious, just check out CNIs website under DPSS modules, and look at the IR section - most of those are Nd:YAG lines that are just directly outputting that wavelength.

Anyway, who wouldn't want a 500nm laser in a handheld, or a 554nm (or a 556nm, like rhd and arythna have :P ) in a handheld? What about a 606nm? That's pretty damn orange. Maybe 612.5nm?

Point is, there is a lot we could be having now... so why don't we have them yet? :P
 
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Wolfman - I'm feeling pretty good about CNI right now. My "30mW" GLP 473nm just came in :)
attachment.php


Back on topic though, I believe Aryntha has a 561nm, and CNI does have a 500nm DPSS (at least a labby).
 

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Wow :O WAAAAAAY overspec. Hope our 589s are like that ;)

But that's exactly what I am saying - why do we only have some of these wavelengths, and not others?
 
How does the math on wavelength additions work ?
 
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Same way as it does for resistors, capacitors, etc in parallel. It's:

1/(1/wl + 1/wl)

Funny relationship that there is that relationship to lightwaves and electronic bits, eh? :P
 
Wolfman29 said:
Same way as it does for resistors, capacitors, etc in parallel. It's:

1/(1/wl + 1/wl)

Funny relationship that there is that relationship to lightwaves and electronic bits, eh? :P
Click to expand...

That's what I thought, but then your math doesn't work. Take:
1122nm + 1138nm

1/1122 = 0.000891266
1/1138 = 0.000878735
0.000891266 + 0.000878735 = 0.001770001
1/0.001770001 = 565nm

IE, not 610nm
 
Hmm... I don't know where that value came from. I was using an online calculator, and... must have just typed something wrong. But that WAS a value I obtained somehow. Forgot how though :confused:.

Will try to fix it :P

AH! That's a typo. 1138nm isn't a line for Nd:YAG. Shoulda been 1338nm. That's what I meant :P
 
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What are all the lines? I've got 5 minutes to kill, and excel staring at me, I'll make a chart ;)

EDIT: This look right?

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I only know of a few lines that are the most prominent....

There's 946, 1064, 1122, 1319, 1338, 1444, and then there are a couple that look like other lines (from CNI): looks like 1030, 1047, 1053, 1085, 1112, 1313, and 1573. Have fun with it!
 
I think the 1342 and the 1338 often get confused... some places had 1338 and some had 1342. I think it's just a matter of where you get your info from.
 
Huh. Why haven't I ever heard of that site before? It seems like a decent laser site. Anyway, how does one check the prices on their lasers? o.O
 
there is also a 561nm that just came out in a handheld from CNI but they cost thousands of dollars
 
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