around 1 mm diameter. So I guess the beam coming out of the YAG rod wouldn be thicker than the rod, but that is already far to much?
(From: Bob.) The beam coming out of the rod diverges pretty rapidly. A few cm away from the surface the beam is about 1 mm in diameter. That compares to beam waists of hundreds of microns or smaller in other small DPSS lasers. Outside the laser, there isn’t anything wrong with a high output divergence as long as the beam is TEM00. A Spectra-Physics Verdi (multi-watt DPSS laser) has around that much divergence out of the cavity. It’s all about beam size. They up-collimate to a few mm and get 1 mR or so. (From: Simon.) What types of optics would I need to have approximately 1 mRad divergence? Also, I would need the beam to be not much bigger than 2 mm diameter from the output of the laser to be able to hit the mirrors on the X/Y galvos for scanning. P.S. Bob, what would you suggest I do? Sell the unit to you and find another hobby? Is it really impossible to make it lase green? The problem is that I probably can’t get much more than a green laser pointer for the amount of money I could g
