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I'm taking a public speaking course and our first speech is just an informative one. I intend to teach the class a little bit about how lasers work. This is next month and I want to have a laser with significant power (1 to 2 Watts) to use as a visual aid. I already have a 20mW 405nm laser gun...

Good morning/afternoon/evening to all of you out there. It's a pleasure to be a member of this forum. I've spent plenty of time looking through things here and decided that this is for me. I've built one laser already and that's the laser gun from the first "Evil Genius" book. My goal is to...