Tweaking a 473nm DPSS laser?

[ljraph]

After I had issues with the green laser in my LaserWorld CS-400 RGB projector (which had to be replaced) I'm looking for a way to increase the power of the 473nm DPSS laser in the system as the green one is more brighter than the original one.
After reading several posts on this forum I found several ways to increase the power of DPSS lasers like TEC and current tuning.
There is no output label on the laser but reading the specs it should be 50mW, the green one is now 150mW (75mW before).

Is there a low risk procedure to test if the laser can be pushed a bit further?
I included some images of the laser and the driver, the driver has 4 pots and two dipswitches at the side.
Does anyone know the function of these pots and dip switches?

Thank you very much for the help.

[mixedgas]

Blue DPSS tuning is best left to someone with considerable ability to tune DPSS lasers.


It is unlikely to be a simple "POT MOD".

You have to vary one variable at a time and plot it over several hours. If your supposing something like "They tuned my laser and then backed it off to make it live!" The answer is most likely not with that supplier. The 976 nanometer yag or vandate has very low gain. While there have been some scientific grade lasers on Ebay lately that could be up=tuned, low cost Asian blues usually do not have much overhead left. They were made, graded for power, and sold according to that power test.

Odds are two variables interact, ie pump diode current AND pump diode TEC setting, so there is no "just dial this up", without cross adjusting.

In other words, they run close to the breaking point already.


At the LOW cost of switching to 445 nm diodes, unless you really need deep 473 blue for a corporate Logo or other need for deep blue, your better off to leave it alone and switch to 445. If there is room for a polarization cube in the projector, you could have both colors and be better off.

Steve

[ljraph]

Hi steve

Thank you very much for your reply.
There is no need to stick to 473nm for any reason, but it could have been a cheap fix :-).
Room is a problem in the CS-400 so no chance to keep both.
I could go for 445nm, analog modulated, but what would be the minimum power I would need? 150mW?

Best regards

Raph

[LaNeK779]

Power is not a problem with the 445

The same diode can do anything from 150mw to a watt and higher.
It is a matter of supplying more current to the diode

And at the power levels you require, heat will not even begin to be an issue, no tec cooling needed etc.

And it will be a much more compact module, too