Optical fiber hermetic seal

Details Optical fiber hermetic seal Optical fiber hermetic seal

1981-10-19

1983-11-08

Lee, John D.

Metal fusion bonding

Process

Critical work component, temperature, or pressure

65154, 228122, 228132, 2642711, G02B 726

Patent

active

044138814

ABSTRACT:
A hermetic seal for an optical fiber is fabricated by casting or molding a mass of fusible alloy around the fiber so that the alloy solidifies within a confined space. The alloy used is characterized by low thermal coefficient of expansion, minimal relaxation after solidification, and appreciable expansion as it solidifies, thereby to create a stable pressure contact at its interface with the optical fiber. The solidified mass may be subsequently soldered into a passage through a wall of a fiber optic device package. Alternatively, the mold within which the mass of alloy is encased or molded may, itself, be soldered into the passage.

REFERENCES:
patent: 3455625 (1969-07-01), Brumley et al.
patent: 3919037 (1975-11-01), Miller
patent: 4119363 (1978-10-01), Camlibel et al.
patent: 4208093 (1980-06-01), Borsuk
Physical Data Applications on "Low Melting Temperatures and Controlled Shrinkage Characteristics Make These Bismuth Alloys Valuable Tools of Industry", Cerro Sales Corp., N.Y.C., New York.
Rich et al., "A Simple Optical Fiber-To-Metal Hermetic Seal", Ceramic Bulletin, vol. 57, No. 2, (1978), pp. 234-235.

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