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Old 06-26-2009, 07:31 PM #1
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Default DIY green with spare parts

I just returned from vacation to Hawaii with my unofficial "girlfriend." I just want to say that Hawaii is awesome.

Anyway... I have lots of spare diodes, heatsinks, crystals, drivers, etc. from lasers and disc reader/burners that were sacrificed for the good stuff. I hate wasting parts so I decided I would try to make use of some of my "scraps."

I slapped a 0.3W 808nm diode in front of a crystal set from an X50 and put it in a heatsink with a bit of thermal glue.

The crystal set was pumping out 61mW peak in the stock CNI assembly.
In the setup I threw together I am getting 94mW unfiltered and 82mW filtered peak power.
The power drops rapidly after a 30 seconds as the module warms up, but the average power is about 50mW 532nm for a couple minutes. It runs in TEM00 with no hops.
I didn't bother measuring pump power or current draw because this was really just an experiment to do something new. I used the diode and driver from 2 different 5mW greens and a heatsink from another. I used a larger brass heatsink over that module for extra cooling and to make a nice fit into the new version dilda host. There is a lot of room for perfecting this module... but as a laser built with scraps, it's fine as it is.
Here are pictures.

I used some heatsink from a 6X sled to keep the driver cool.






In comparison to a 120mW X105:




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Old 06-26-2009, 08:59 PM #2
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Default Re: DIY green with spare parts

Sweet build! Nearly a 100mW peak is darn impressive
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Old 06-26-2009, 09:15 PM #3
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Default Re: DIY green with spare parts

Very impressive! DPSS can be a lot of fun..
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Old 06-27-2009, 04:01 PM #4
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Default Re: DIY green with spare parts

Nice build, even got some beam shots.

Jon
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Old 06-27-2009, 04:39 PM #5
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Default Re: DIY green with spare parts

Ha! Nice one man, have you tried using a 500mW 808nm diode?
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Old 06-29-2009, 12:19 AM #6
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Default Re: DIY green with spare parts

Quote:
Originally Posted by nikokapo View Post
Ha! Nice one man, have you tried using a 500mW 808nm diode?
The 0.5W diode is what Nova uses. I didn't have an LPM before I took the crystals out of the X50 so I was not able to see if increased pump power from the stock setup could achieve higher powers with reasonable stability.
Next time I get one of these I will do some tests. The crystals can handle the power, but will not maintain peak output without better cooling.
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Old 06-29-2009, 10:37 AM #7
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Default Re: DIY green with spare parts

Kudos Pierce! If you ever figure out how to get double the output you might just be able to go to Hawaii every 6 months. ;-)
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