Glass fiber hermetic seals using a CO(2) laser.
Glass fibers of approximately 0.13-mm diam have been hermetically sealed through windows of Corning Code 7740 glass and Code 7052 glass, and into B(2)O(3)-3SiO(2) glass as well. The seals were made with a 50-W CO(2) laser at a power level of about 5 W. Transmission loss tests show a transit loss of <0.2 dB for a B(2)O(3)-3SiO(2) clad fused silica fiber through a Corning Code 7740 glass window.
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Kyle