Recent content by lightweight

LSRFAQ, Thanks for the reply. Sorry for the delay. I have been buried in the lab. Trying to improve things. Several of your points were very helpful. I seem to have improved things quite a bit. Here is what helped: Properly sized pinhole - about 10um seems best with these diode lasers...

Thanks Steve, Very thorough response and very much appreciated. At this point, I am a little stuck. The 404-405nm diode is being used mostly because the module is small and high power >500mW compared to the "cleaner" modules. Also, we have built our own laser driver so we can pulse the...

Thanks for the reply. Yep. Multimode diode lasers are tough. I seem to have a nice spatial filter working. However, I am trying to get some high contrast fringes through a Mach-Zender interferometer. I get fringes but low contrast. I think it is the multiple longitudinal modes killing...

Hi, I have a 500mW 405 laser diode with a G2 lens. I need to spatially filter the beam to produce a beautiful gaussian profile. I am trying to produce a clean set of interference fringes through a Mach-Zender interferometer. I have a optics table and a 12.5 micron pinhole with nice...