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Old 11-21-2011, 11:56 PM #17
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Default Re: no beam diode, but red inside.

The red light you are seeing is -definitely- IR.

The problem could be blown pump diode (likely if you powered it from any powersource without a driver), something that is very hard to repair and not worth the effort on a $10 module. You typically still be able to see some IR light in this case as the pump diode bascially works like a (powerful) LED, but it will never be useful to pump the crystal set again.

All this is assuming the diode is actually blown. If it was supplied without a driver, you need to control the current to the diode carefully. If the current is too low, the pump diode will emit red light but the doubling process will not work... so increasing the current a bit can be worthwhile if in doubt.

As for green modules without a driver: you rarely see them indeed, but it would save me time removing the driver when using them in projectors and such, so i guess there is a market for them.


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Old 11-22-2011, 12:45 AM #18
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Default Re: no beam diode, but red inside.

Yea what Benm said and if you have a NV set you can look at a IR diode.
I have a cheep NV monocular I use for just that, looking at IR diodes.
good IR diodes look different than bad ones with NV equipment.
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Old 11-22-2011, 01:26 AM #19
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Default Re: no beam diode, but red inside.

Quote:
Originally Posted by Flaminpyro View Post
Yea what Benm said and if you have a NV set you can look at a IR diode.
I have a cheep NV monocular I use for just that, looking at IR diodes.
good IR diodes look different than bad ones with NV equipment.
May have to look into that! How cheap are you talking about? I may have to do that.

And very nice press btw. They came in, Very well machined.
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Old 11-22-2011, 12:30 PM #20
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Default Re: no beam diode, but red inside.

IR can be viewed with most digital and cellphone cameras... Just try it with your TV remote.

Then you can gauge the relative brightness between the VERY weak IR remote and the VERY strong IR output from your laser...
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Old 11-23-2011, 02:52 AM #21
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Default Re: no beam diode, but red inside.

Quote:
Originally Posted by GoolGaul View Post
IR can be viewed with most digital and cellphone cameras... Just try it with your TV remote.

Then you can gauge the relative brightness between the VERY weak IR remote and the VERY strong IR output from your laser...
Thanks for the input.
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Old 11-23-2011, 03:00 AM #22
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Default Re: no beam diode, but red inside.

This is the one I use for looking at IR and you can also use it for it's intended purpose

Weaver Digital Nightview Monocular (849397) - Weaver 849397 Monocular - Epinions.com




Quote:
Originally Posted by Ilotrophic View Post
May have to look into that! How cheap are you talking about? I may have to do that.

And very nice press btw. They came in, Very well machined.
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