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Why can't 980nm be frequency-doubled?

Sta

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Excuse my idiocy!

I'm just wondering why 980nm isn't easily frequency doubled into 490nm like 1064nm is into 532nm. Is there not a proper crystal to do it?
 





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If I remember correctly, it's because the efficiency of the doubling crystal (KTP) drops to uselessness after 500nm. I read that somewhere around here.
 
D

Deleted member 16589

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Excuse my idiocy!

I'm just wondering why 980nm isn't easily frequency doubled into 490nm like 1064nm is into 532nm. Is there not a proper crystal to do it?

It can but the crystals and coatings required don't come cheep.

My protera produces 488nm by the direct inner cavity doubling of 976nm through a KNBO3 crystal
KNBO3 can also work at doubling 980 to 490 In fact IIRC a member here on the forum has done it. I'll give him a pm and see if he would like to chime in.
 
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It can be done with BiBO, but direct SHG
from a diode is problematic. There only a
few modules around that do it. There are
wavelengths close to that that are more
commonly done using vanadate. LBO and BBO
will also work, but they must be inside a
sealed chamber because they absorb
atmospheric moisture.
 
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You can do it, but you don't see them around because its not producing any wavelength that anybody wants. Plus as I understand it you need to perform some diode correction.

It's actually not as bad as you'd think. I can probably get a functional module for ~500-700 bucks.
 

rhd

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You can do it, but you don't see them around because its not producing any wavelength that anybody wants. Plus as I understand it you need to perform some diode correction.

It's actually not as bad as you'd think. I can probably get a functional module for ~500-700 bucks.

For not a whole lot more than that, you can get a 490nm single mode diode.
 
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For not a whole lot more than that, you can get a 490nm single mode diode.

uh...where? Unless you are referring to the 488 diodes, which are several thousand $, not several hundred.
 

rhd

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uh...where? Unless you are referring to the 488 diodes, which are several thousand $, not several hundred.

I am.

And they're not "several thousand", they're a little bit over one thousand.

And that's "not a whole lot more" than $700.

;)
 
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I am.

And they're not "several thousand", they're a little bit over one thousand.

And that's "not a whole lot more" than $700.

;)

Eh? I can only assume you are referring to the Osram diodes, but those aren't for sale anywhere.
 
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Now i wasn't aware of this diode development. Ah well, I can't afford it either way. Maybe when the price goes down. A lot. College is expensive :(
 




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