Recent content by ewolfe3

Yes, I know Snell's Law, but I'm not sure where wavelength comes into the equation? or, again, where this is even a factor?

A point of clarity. Our laser will be at around 800nm wavelength. This beam will be split into a main beam and a probing beam, that will then converge at this pinhole. This will result in blue light... somehow?

I realize that SHG is just frequency doubling, but how? Specifically, I've been told by my professor that when two beams meet at a pinhole in our optics setup and are in phase, that we will be able to see blue light? Is this due to wavelength? Points for keeping the explanation simple.

We're working with a Ti:Sapphire Laser pulsed at 80MHz. Our setup in a nutshell is having the main beam separated into a main beam that will excite the sample of XYZ head on, and a probing beam that will hit the sample at some angle, and be reflected off and into a prism that will separate the...

I need a material I can use to make the walls of a dark room. Something that won't allow much (if any) light in, and also will be safe to use if the laser, 3 watt 800nm wavelength, accidentally hits it. Price should have some bearing too. I was thinking some type of flat, dull fabric that I can...

Also, thanks for the fast responses!!!

Awwww. No, the area we would need to light would be fairly small, and comparable to lighting a small walk-in closet, maybe 10ft x 8ft. We really only need the light to be able to tell where the optics is so we don't accidentally bump it, as opposed to calibration, which we'll do in full light.

I'm also looking into possibly using LEDs. From what I've seen they have a fairly narrow bandwidth too. Probably orange or yellow.

I need to build a darkroom for our lab's experiment. We're using a 15 watt pump and will probably be around 3 watts coming out hitting the sample. Our primary wavelengths will be around 800nm and 400nm. We need to light the room housing the experiment with a light source that will not interfere...