CNI 1.5W OEM-F 532nm insides / tuning .

[DashApple]

Hey ,

Just got two CNI OEM-F 1W rated 532nm laser systems , I paid 480 AUD for both systems with one laser outputting 1.5 Watts stable . The second laser had developed a low power output of 650mW stable .


The pictures are of the low power head running at threshold and full power . I hope to attempt to bring the laser back up to over its 1W rated power as it originally did around 1.5 Watts as the other is still doing .

currently with a brief look inside the head , the layout is pretty simple . The silver colourd block is the lens to focus the 808nm into the YVO4 followed by the KTP in its mount ( with no top ) then followed by the OC .

My current assumption is that there is a slight miss alignment in the head or that the pump diode is giving up but im unsure on which to go for first :/ . Im currently waiting on a LPM to arrive but before the laser was shipped to me a few days ago it was measured 650mW stable .

Pics !


IMG_0184 by TwirlyWhirly555, on Flickr


IMG_0183 by TwirlyWhirly555, on Flickr


IMG_0186 by TwirlyWhirly555, on Flickr

 

[Tmack]

1.5w of 532 must be a great site.
Nice deal you got for both.

 

[DashApple]

1.5w of 532 must be a great site.
Nice deal you got for both.

It definitely is

Looking at the beam The 1.5W is running in TEM01 at low power then jumps to 00 at high power .

The laser that's low power is running in what looks like TEM10 at full power of 650mW , This sounds like more of a alignment issues over dead/dying pump .

 

[KRNAZNBOY]

Where did you get these? That's a crazy price!

Thanks!
-Matt

 

[DashApple]

Today I messured the output , after a slight adjustment with the focusing lens on before the YVO4 the power is up to 850mW , but there is fluctuations on the way to that power .

I think it purely is a alignment issue


underpower 1W green CNI by TwirlyWhirly555, on Flickr

 

[sinner]

Those are some nice labby's , Thanks for sharing the insides. +1

 

[ultimatekaiser]

It does sound like an alignment issue in fact in that picture it looks like the KTP is sitting a little bit off, The output seems to be grazing the top/side of the crystal a bit, but it could just be camera glare.

 

[crazyspaz]

That's what I thought too when I saw the first picture, looks like it is hitting the top corner of the slab. Can you confirm this, Ion?

 

[Speedy78]

Need to get some crystals so I can make my dpss. Nice to see the insides.

 

[DashApple]

It does sound like an alignment issue in fact in that picture it looks like the KTP is sitting a little bit off, The output seems to be grazing the top/side of the crystal a bit, but it could just be camera glare.

That's what I thought too when I saw the first picture, looks like it is hitting the top corner of the slab. Can you confirm this, Ion?

Thanks for the reply , Ill take a look again soon and see if that's the case , currently I have the laser at 850mW stable with just lens adjustment , so next ill look at the KTP and go from there ,