Melles-Griot 05-LHR-551 632.8nm (red) 7.0mW TEM00 mode $100.00
Spectra-Physics model 905 632.8nm (red) 7.0mW TEM00 mode $100.00
$150.00 for the pair.
these were pulled from Xerox printers (yes, laser printers originally used gas lasers) and they both work. power supply is not included, but it's not difficult to find or build one. their start voltage is 10kV, run voltage is 2.5kV.
Spectra-Physics model 905 632.8nm (red) 7.0mW TEM00 mode $100.00
$150.00 for the pair.
these were pulled from Xerox printers (yes, laser printers originally used gas lasers) and they both work. power supply is not included, but it's not difficult to find or build one. their start voltage is 10kV, run voltage is 2.5kV.