A first outlet into the reaction tube allows for evacuation of the system, andtwo other outlets are connected to gas bleed systems, one for adding the organic monomer gas, and the other for an inert carrier gas, such as argon, helium, or other appropriate carrier gas.In carrying out the deposition process, the glass reaction tube is first evacuated to about 10.sup.-3 to about 10.sup.-6 Torr.