It is set to 2A and I ran it for about 90 seconds and no noticeable heat from the sink. The modules are in a 20mm CU sink already and I isolated the module in the Al Sink. Runs great nice yellow WL ..
It was my understanding that the 565nm modules were a bit greener than the 575nm ones. Many people who own both have said so. I suppose if you only have the 565nm one, it might look yellow, but side by side, it doesn't.
I actually prefer the 575nm lasers over the 565nm ones because they are so very yellow with no trace of green. I could have purchased both at the time I got mine, but didn't think it would be an issue to get one later. Hindsight is 20/20 and, in retrospect, I would have purchased both if I had it to do over.
Yeah, Rich. If your laser is pure yellow, it must be one of the 575nm ones. Ten nm shorter in wavelength and you would see some green. I need to measure the output power of mine as it is higher than the 36 mW I have it posted on my signature. I have added heat sinks to the output transistor and driver IC and a fan to actively remove heat from the driver. It remains stable for 20 minutes as I had it on for that long just the other day.
Reposting in each OPT Yellow Thread for INFO Purposes: For those whose 565/575 nm yellow has died/ lost power:
After reading paper after paper... ND:SVAP has some bad habits to be solved.
Turns out the dopant metal has a habit of A. Migrating, and B. forming micro-clusters of raw metal in the crystal, and C. forming F Centers of high adsorption. . If your yellow is dying, as in really dead, move the crystal sideways in the laser and retune the pump diode focus and crystal angle. See if it lives. Your pump diode needs to be on wavelength within +/- a nanometer and a half or so, as well for peak power.
The pump diode moves around 0.2 nm /'C . Pump is near 796 nm, although other bands can be used. Wear Laser Safety Glasses when doing this, a Watt of 796 nm pump light can easily blind you..