A fiber optic feed-through tube, a method for making it and a method for hermetically
sealing and aligning lightwave waveguides inserted into the tube. The feed-through
tube is preferably a metal tube with low melting point hermetic sealing material
deposited on one end and the lightwave waveguide is an optical glass fiber. The
fiber is fed through a tube having low melting point hermetic sealing material
on one end.
