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For sale: Melles Griot Glan Thompson model 03 PTH 003 polarizer with 15 mm side length. Over 1 cn clear useable aperture. Anti reflection coated for 650nm-1100 nm but useable for 350 nm-2,300 nm. Tested down to 405 nm-no problem. Includes Melles Griot calibrated rotation post mount. Polarizers of this size are $1K-$2K depending on grade and the mount a few hundred dollars more. Buy this one used for $325 including shipping to the USA. Phil, 142laser, (813) 974-2378, pbergero@cas<dot>usf<dot>edu

I forgot to mention that this polarizer can be used with any low power (1W or less) visible laser to adjust the beam power and has good transmission when aligned with the polarization axis. So if you are using a 50-50% BS you can then use this to attenuate one of the two beams to get any ratio you want. Phil