The Big Green Thread (I'm gonna regret posting this in the morning)

[logsquared]

looks like ultralasers has 5w C mount with fac and 150um emitter for $165usd. Not sure of the quality? Guessing they are the same diodes they use in the dhom DPSS lasers they sell?

[chad]

Ok cool.

thanks,
Chad

[mixedgas]

Allowing for the group buy manager to make some money for doing a 5000$ deal out of his own bank, 450$ for the 7 watt in lots of 10.
I'm also getting controlled wavelength, no wild quality control issues.

Check the Ultralasers diode carefully, make sure they ship with FAC.


Steve

[planters]

I'm still a little skeptical of the PPLN system. I too would like an "illuminate and go" solution before putting in a lot of effort down the more conventional route. I can't find good references or demonstrations of the system in action at a level that makes it truly different than a laser pointer ie many hundreds of mW. The divergence on one site of 10-15mrad without a typical beam dia. isn't useful. And at power levels that make this competive with a typical 1W CN laser the thermal loading will probably further impact the beam quality

http://c2clink.com/greenlaser.htm

I think that this is worth looking at a little more closely. Maybe when the first test diodes are not being used with the main project it would be interesting to place one of these chips in that beam and see what happens.

[mixedgas]

C2clink has a PPLN without Vandate. That might be mildly interesting.

Steve

[logsquared]

I'm still a little skeptical of the PPLN system. I too would like an "illuminate and go" solution before putting in a lot of effort down the more conventional route. I can't find good references or demonstrations of the system in action at a level that makes it truly different than a laser pointer ie many hundreds of mW. The divergence on one site of 10-15mrad without a typical beam dia. isn't useful. And at power levels that make this competive with a typical 1W CN laser the thermal loading will probably further impact the beam quality

http://c2clink.com/greenlaser.htm

I think that this is worth looking at a little more closely. Maybe when the first test diodes are not being used with the main project it would be interesting to place one of these chips in that beam and see what happens.

The seller stated the exit beam is .1-.15mm, pump dependent.

I will actively try to get a hold of one and the cheap diode from shawn (provided he confirms the FAC is instaled). I figure they went to the trouble to design and build these things they have to do something. And for around $300 its not too expensive of an experiment.

I would love to try the conventional method you and Steve are going after. I could see myself spending a few grand and having a expensive project that never gets finished or just doesn't meet expectation. I have too many of those siting around Not to mention my assessor just raised my property taxes by %300. So, i really don't have the extra cheese laying around If you guys do get it nailed down I will happily copy your design when money permits

[LaNeK779]

. So, i really don't have the extra cheese laying around If you guys do get it nailed down I will happily copy your design when money permits

I am in the same sitution, definately interested.

[planters]

C2clink has a PPLN without Vandate. That might be mildly interesting.

Maybe, but I suspect the power handling capability will be limited.

After looking through the 3.6W, 5W and dual end pumping papers again, I think the specs are similar enough that if cost were no object then a couple of hours and a visit to the major suppliers and the components could be ordered. The fog is beginning to lift. But the cost is an object and how to navigate these designs to steer around the most expensive and least critical components will take some thought.

KTP vs. LBO?

3.5W vs 7W how important?

Yellow capability worth designing in?

Is tight packaging important?

Price point vs convenience?

[badger1666]

KTP vs. LBO? lbo slightly hygroscopic are the avdvantages worth putting up with it
and making sure the cavity is well sealed ?? not that it should not be anyway but would be worrying all the time the cavity was open and working on it

3.5W vs 7W how important? i think 7w is a bit much for most of us unless everyone
into doing big venues and outdoor stuff ?

Yellow capability worth designing in? not fussed on yellow but would like to see a design
where you could just swap out the right parts and get 457nm ?

Is tight packaging important? if its 150x150mm or less i am happy

Price point vs convenience? as long as price does not get to silly i am ok

[steve-o]

Define silly price lol ;]
3.5w vs 7 ? I'd have the 7 and turn it down when necessary, but wouldnt the price difference be astronomical??
I'l lurve to see some yellow .. but then again .. a lot more expensive ?
Tight package is not too important to me either.. I'mean compared to ions everything is small these days.. cant complain
Price less than 2KUSD would be nice .. unrealistic? Doesn't have to include a fancy enclosure imo.. it's going in a projector case anyway ..