the good 637 500mW-1W solution

[Doctorbass]

I am looking for the best cheap solution for a 637 source of 500-1000mW depending on the cost.

I like the 637 due to the single mode and very good low divergeance

actually my projector need to have more red to match the 532 and 447nm for a better white balance.

Actually i have to lower the 532 and 445 intensity to get a good balance but it also reduce the total output power capability as well.

I am really satisfied with the Laserwave OEM pro S module that i have and i just wonder wich would be the best cheap solution.

I actually have one 170mW 637 source from laserwave. My blue is a 447 of 800mW and the green is a 532 of 650mW. without intensity correction it's a little greenish/bluish as well.

I also have probelm with the green blanking that is offset in intensity and in QS i can not correct the balnking of rgb color individually. I suspect that the problem is due to the very low modulatio range of the green because it is dimmed to accomodate the white balance.


Now.. i am questioning about the best possible solution to add some red.


Option 1: I wonder if i keep my actual 637 170mW and just add another one from laserwave for about 210$ and combine it with a BS cube... so i would get just 340mW total.. and keeping under 1mrad divergenace would it be ok.?. i have doubt...... but it's 340mW of 637 with <1mrad divergeance wich is pretty intense compare to a 650 or 660 of the same power.. maybe 800mW equivalent 650 ? But anywai i would still have lack of red...

Option 2:
or if i sell my 637 170mW and buy a more powerfull one 600mW from Laser wave
but would get <2mrad of 600mW 637 (1075$ Ouch !)
instead of 1mrad 340mW of 637 ( 210$)

Option 3:Or if i build one myself with a quad 4 x 170mW 637 in knife edge 2 x 2 or combine 2x knife edge with BS cube... cost?

Option 4:
Crazy option and buy a Kvant of 680mW for about 1800$ !!! ouch!

Option 5:
I keep the actual 637 and add a 638 500mW that i build and add some anamorphic prism to correct the divergeance and beam size...( 500$ ?)

What would you do?

I always keep in mind that overall the best would be to get abuot 1W of red.. but i dont have the money for that because i want to keep low divergeance too.

Thanks for any help or offer !

Doc

[logsquared]

What size are your scanner mirrors? What is the divergence of your blue and green?

[Doctorbass]

What size are your scanner mirrors? What is the divergence of your blue and green?

it's the one that come with the DT40 pro:
5X10X0.8mm
7X12X0.8mm

The blue is 2*4mm <3*0.5mrad
The Green is <3mm <2.0mrad

[logsquared]

DT40's can have 3mm or 5mm apertures. If your mirrors measure 5mm then they have a 3mm aperture. If you are gonna DIY, the thing to look at is cost VS complexity VS divergence.

The best beam is going to come from single mode diodes. You can "easily" fit 4 diodes on 3mm mirrors without telescope optics with ~.5mRad or better. But, you need 4X diodes, 4X 4mm collimator lenses, 2X mirror mounts, 1 PBS and a waveplate unless you stack your diodes || and =. If driving the opnext diodes at rated power you should see around 600mW after optics.

An easier and cheaper way is to use a P73 500mW multimode diode with a 3mm or 2mm collimator lens and telescope optics. The best you can do is around 2mRad and still fit on 3mm mirrors. if you overdrive the diode you can expect a watt. You will have an uglier spot. That's the trade-off.

You could also use 2X P71 with a PBS or "under over" stacked with 2mm collimator and telescope and get around the same power as the single P73 overdriven. You can get a bitt better divergence of around 1.8mRad on 3mm mirrors.

Sounds like you may need a prism pair to "fix" the divergence of the blue you have.

[edison]

Buy one in my signature. Available in several powers. Very low divergence, analog modulation up til 100khz and very good stability Not 1800 usd but closer to 1000 usd

[sbk]

+1 for Edison's modules. I have two units (445nm but red should be the same) running into projectors and they works more than great.

In any case with 637nm I would go for European modules as Chinese ones are not that much cheaper if not even more expensive, but quality is still way lower.

[edison]

Thanks SBK. What,s almost equal important is service and repair. If you buy a module from china or something else and when its broken after lets say just over a year who is going to repair it ? Cheap means usually a can,t help you attitude that goes allong with it. Don,t think i buy a module but think i invest in a company that can help me as long as i use lasers. That way you have someone to help you out when things need to be repaired. My modules are more expencive then a chinese one but i offer help with all sorts of things. Not only with a broken laser but also when people need advice. And on top of that i invest all the money that people send me to develop new things like higher powered modules in red, RB modules etc. So you know upfront where you spend your money on indirectly. So its and investment instead of buying a module. Just my 2 cents........

[planters]

OK. I would forget the Kvant. If your into building a dual G71 with a vertical stack and a cylinder pair (no wave plate/PBS) produces a nice square 4.5mmx4.5mm beam and 1.2 mrad full angle. 1W after optics if run @ about 750mA each. If not into building go with edison and he can probably beat this (I know it is possible).