1Watt 532nm Compact Laser Cube

[chad]

First brush looking at this I was skeptical. Now.. Not so much.

It would take a real effort to make this a stable laser but seems doable.

HHm If I get some spare cash I might just have to get a hold of one.

Chad

[dave]

And they all have IR filter right?

FYI...Winni at goldenstarlaser is selling CNI 1W with CNI PS for $~560 USD. I have 3, the last one I got came in at 1.75W, worst one was 1.5W

[buffo]

FYI...Winni at goldenstarlaser is selling CNI 1W with CNI PS for $~560 USD.

I've looked at their website before, but I've never seen any listings for bare laser modules. I've only ever seen complete projectors. Was this a special arrangement with a single seller?

Also, was that price for a TTL laser or one with full analog modulation? Because if you look at their projector product lines, the TTL units are dirt cheap, but as soon as you step up to analog modulation the price jumps up too.

Nevertheless, it still blows my mind that a watt (or more) of green can be had for under $600... (All we need now is cheap read in multi-watt powers and you can kiss ion lasers goodbye forever.)

Adam

[madmacmo]

FYI - I just received the response below from eBay seller lasercrystals:

Re: Other: m***** sent a message about 1 Watt compact high power 532nm green laser #251065123011‏
eBay Member: lasercrystals
eBay Member: lasercrystalslaserc_hv2846lhf@members.ebay.ca
Seller has responded to your question about this item
Please find the answers as bellow.

Dear m*****,

- Aperture diameter - 3 mm
- Beam diameter, perpendicular and parallel - 120-150 um at the aperture of the green laser
- There is no collimator in the laser
- Divergence - 10-15 mrad (full angle)
- %IR - less than 10 mW

Sales

- lasercrystals

[andy_con]

same

Please find the specs of beam spec as follows:
- Aperture diameter
3 mm
- Beam diameter, perpendicular and parallel
120-150 um at the aperture of the green laser
- Collimation, perpendicular and parallel
There is no collimator in the laser.
- Divergence
10-15 mrad (full angle

[KGB]

I've looked at their website before, but I've never seen any listings for bare laser modules. I've only ever seen complete projectors. Was this a special arrangement with a single seller?

Also, was that price for a TTL laser or one with full analog modulation? Because if you look at their projector product lines, the TTL units are dirt cheap, but as soon as you step up to analog modulation the price jumps up too.

Nevertheless, it still blows my mind that a watt (or more) of green can be had for under $600... (All we need now is cheap read in multi-watt powers and you can kiss ion lasers goodbye forever.)

Adam

All the lasers I have ever gotten from them were analog(at no extra price) direct from CNI with matching CNI drivers, so I assume they are IR filtered just as good as any other CNI module..

They have tons of stuff that they don't list online...email them and ask for a pricelist....no special arrangements between us...anyone can get those prices....

[mixedgas]

Well, I looked at the paper. For 4 hours of running they got a greater then 28% conversion of pump to green with the periodically poled MgO. They did not report test results beyond four hours. The PPMgO in their test was made at McMaster University in Canada, before the polling technology was transfered to China. While this is a spectacular conversion rate, the lack of a long term test is saddening.

This is tricky to implement, as they used a 500 uM thick chip of 10 to 16 mm of length, with a 7 um Poling. In the paper the conversion MgO crystal has to be held within 2'C of a critical temperature. The Msquared for the laser was 2.4. If they drop to tem00 operation the power is down about 20%.

16 watts of 400u diameter fiber pump got them between 6 and 7 watts of green depending on mode and desired stability. Thats fantastic, but the thin crystal means these are not likely to ever be a homebuilt.

They mention also using 880 nm as a pump wavelength in other tests to reduce thermal loading on the YVO4. They do not give specs for that.

A US maker of PPLN MGO is in California, Epcos, who also makes AOMS. You might get better data from Epcos.

Steve

[mixedgas]

Well, I looked at the paper. For 4 hours of running they got a greater then 28% conversion of pump to green with the periodically poled MgO. They had a conversion of 1064 to 532 that they claim was 77% while Qswitching. They did not report test results beyond four hours. The PPMgO in their test was made at McMaster University in Canada, before the polling technology was transfered to China. While this is a spectacular conversion rate, the lack of a long term test is saddening.

This is tricky to implement, as they used a 500 uM thick chip of 10 to 16 mm of length, with a 7 um Poling. In the paper the conversion MgO crystal has to be held within 2'C of a critical temperature. It is type one doubling, and the alignment is not as sensitive as the usual KTP. The Msquared for the laser was 2.4. If they drop to tem00 operation the power is down about 20%.

16 watts of 400u diameter fiber pump got them between 6 and 7 watts of green depending on mode and desired stability. Thats fantastic, but the thin crystal means these are not likely to ever be a homebuilt.

They mention also using 880 nm as a pump wavelength in other tests to reduce thermal loading on the YVO4. They do not give specs for that.

A US maker of PPLN MGO is in California, Epcos, who also makes AOMS. You might get better data from Epcos.

Steve[/QUOTE]

[madmacmo]

Well, I looked at the paper.

Kudos for purchasing, reviewing and posting the summary highlights above. This I find to be both particularly tantalizing information and yet at the same time most frustrating for their lack of having documented more thorough in-depth testing or analysis.

[Laser Zone]

http://m.youtube.com/watch?v=BPE7LFKsqt4