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Title: Fiber optic assembly and method of making same

Abstract

There is provided an assembly having a light guiding medium sealed to a her. Preferably the holder is a metal shell and a light guiding medium is an optical fiber of glass or sapphire whisker. The assembly includes a sealing medium which sealingly engages the metal holder to the fiber. In the formation of the assembly, the seal is essentially hermetic having a capability of minimizing leakage having a helium leak rate of less than 1.times.10.sup.-8 cubic centimeters per second and high strength having a capability of withstanding pressures of 100,000 psi or greater. The features of the assembly are obtained by a specific preparation method and by selection of specific starting materials. The fiber is selected to have a sufficiently high coefficient of thermal expansion which minimizes strains in the component during fabrication, as a result of fabrication, and during use. The other components are selected to be of a material having compatible coefficients of thermal expansion (TEC) where the TEC of the holder is greater than or equal to the TEC of the sealing material. The TEC of the sealing material is in turn greater than or equal to the TEC of the fiber. It is preferred thatmore » the materials be selected so that their respective coefficients of thermal expansion are as close as possible to one another and they may all be equal.« less

Inventors:
 [1];  [2]
  1. (Centerville, OH)
  2. (Barkhamstead, CT)
Issue Date:
Research Org.:
EG & G MOUND APPLIED TECH
OSTI Identifier:
871135
Patent Number(s):
5664040
Application Number:
08/520,635
Assignee:
United States of America as represented by Department of Energy (Washington, DC) SNL
DOE Contract Number:  
AC04-88DP43495
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fiber; optic; assembly; method; provided; light; guiding; medium; sealed; preferably; holder; metal; shell; optical; glass; sapphire; whisker; sealing; sealingly; engages; formation; seal; essentially; hermetic; capability; minimizing; leakage; helium; leak; rate; times; 10; -8; cubic; centimeters; strength; withstanding; pressures; 100; 000; psi; features; obtained; specific; preparation; selection; starting; materials; selected; sufficiently; coefficient; thermal; expansion; minimizes; strains; component; fabrication; result; components; material; compatible; coefficients; tec; equal; preferred; respective; close; cubic centimeter; leak rate; metal shell; sealing material; starting material; thermal expansion; fiber optic; optical fiber; starting materials; sealingly engages; preparation method; optic assembly; helium leak; sealing medium; guiding medium; sealingly engage; light guiding; /385/65/

Citation Formats

Kramer, Daniel P., and Beckman, Thomas M. Fiber optic assembly and method of making same. United States: N. p., 1997. Web.
Kramer, Daniel P., & Beckman, Thomas M. Fiber optic assembly and method of making same. United States.
Kramer, Daniel P., and Beckman, Thomas M. Tue . "Fiber optic assembly and method of making same". United States. https://www.osti.gov/servlets/purl/871135.
@article{osti_871135,
title = {Fiber optic assembly and method of making same},
author = {Kramer, Daniel P. and Beckman, Thomas M.},
abstractNote = {There is provided an assembly having a light guiding medium sealed to a her. Preferably the holder is a metal shell and a light guiding medium is an optical fiber of glass or sapphire whisker. The assembly includes a sealing medium which sealingly engages the metal holder to the fiber. In the formation of the assembly, the seal is essentially hermetic having a capability of minimizing leakage having a helium leak rate of less than 1.times.10.sup.-8 cubic centimeters per second and high strength having a capability of withstanding pressures of 100,000 psi or greater. The features of the assembly are obtained by a specific preparation method and by selection of specific starting materials. The fiber is selected to have a sufficiently high coefficient of thermal expansion which minimizes strains in the component during fabrication, as a result of fabrication, and during use. The other components are selected to be of a material having compatible coefficients of thermal expansion (TEC) where the TEC of the holder is greater than or equal to the TEC of the sealing material. The TEC of the sealing material is in turn greater than or equal to the TEC of the fiber. It is preferred that the materials be selected so that their respective coefficients of thermal expansion are as close as possible to one another and they may all be equal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {9}
}

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