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Anyone ever work with the NECSEL 10 watt 520nm before??

Light superglue

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Where do you buy these drivers?
I saw they can output up to 24V at 4A, so maybe if they can be used in parallel I could drive my NUBM08 block with only 2 of them???
 



DashApple

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For anyone interested here is the inside of one of the green units .

Testing at 10A , But these are very temperature dependant , there is a heater behind the PPLN . Looking at the diode array it looks like all emitters are working , just need more current and full temperature control .

P1010538 by TwirlyWhirly555, on Flickr
 
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kecked

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Wow thanks for doing this. What side does the beam come out? So it’s IR pumped. JUST GUESSING by the purple glow below. How does it form a single beam or does it? Now more confused. I’d like to find one in yellow.
 

RedCowboy

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Thanks for the pic DashApple (y)

Anyone wanting to use one of these will need to build a temp control circuit with a feedback loop to constantly maintain output based on feedback by regulating the crystal temp, or you could tune by hand to see it work, but it won't be a set and forget deal.

Here's some possible temperature range info on PPLN: https://www.covesion.com/products/magnesium-doped-ppln-mgoppln-crystals/mgo-ppln-for-second-harmonic-generation/1064nm.html

Here's some info about PPLN : https://www.thorlabs.com/catalogPages/693.pdf
 
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DashApple

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Wow thanks for doing this. What side does the beam come out? So it’s IR pumped. JUST GUESSING by the purple glow below. How does it form a single beam or does it? Now more confused. I’d like to find one in yellow.
No problem . Its actually from what I can see ( and info online ) 48 individual emitters in two rows of 24 , So you get two rows of beams from the top in the direction you can see the green lines .

Yeah its a IR pumped directly doubled laser . The purple area is the surface emitting diodes in two rows .

RedCowboy - Thanks for the links , There are two thermistors that can be used to maintain temperature regulation of the diode and the PPLN heater , that's where I would start , get a controller to maintain a set temperature for best conversion / running
 
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kecked

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Oh I see well that’s not useful at all for what I do. I thought it would be a single tight beam like opsl.
 

RedCowboy

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I'm sure that's not 10w but very nice test, good work dash (y)
 

Light superglue

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Hi Dash,

Very nice! You made this thing work!
I understand that you have a big cooler under the module and just heat PPLN with a small controlled heater.
What kund of cooler and heat controller do you have? Are they commercial or were assembled by you for the task?
 

DashApple

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Thanks : D , Yeah , There is a TEC under the module and i'm using a simple on/off tec controller for temperature regulation , the model is a Die4Chill , they are no longer sold/made but any TEC controller from a laser company would be fine and the newer ones are PID based so would be even better .

The heater is built into the head and is run by the same type of controller but with an inverted output , its crude but works , a PID controller is best as the PPLN temperature seems to affect the performance the most .

This is with the cover off , the beam is a rectangle shape made from 48 beams ( 24*2 )

P1010678 by TwirlyWhirly555, on Flickr

I'm sure that's not 10w but very nice test, good work dash (y)
Thanks : D , They only seem to do up to a 3W model and there is no indication what one this is , 1 , 2 or 3 W
 

DashApple

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Thanks : D ,

Sure , With the module upright and the socket facing you from left to right on the 6 pin connector ,

1/2 PPLN heater , 3/4 diode thermistor , 5/6 PPLN thermistor .

Diode power left is Negative , Diode power right is Positive .

This applies to the model I have .
 

Shmackitup

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Thanks : D ,

Sure , With the module upright and the socket facing you from left to right on the 6 pin connector ,

1/2 PPLN heater , 3/4 diode thermistor , 5/6 PPLN thermistor .

Diode power left is Negative , Diode power right is Positive .

This applies to the model I have .
This is the model I have: NECSEL
 

DashApple

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Ah , Sorry I don't have any information on that module , You would have to take the cover off and trace pins or measure across the pairs .

The diode is easy to see , though you will have to work out the +/- , if you measure the smaller connections the heater will be a reasonably low value and the thermistors should be 10KOhm ish .
 

Shmackitup

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Ah , Sorry I don't have any information on that module , You would have to take the cover off and trace pins or measure across the pairs .

The diode is easy to see , though you will have to work out the +/- , if you measure the smaller connections the heater will be a reasonably low value and the thermistors should be 10KOhm ish .
OK. Thanks!
 




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