Process for the production of an optical fiber bundle for heat resistance and vacuum resistance by bonding fiber ends with a bonding glass
AssigneeSumita Optical Glass, Inc.
InventorsNobuyoshi Baba, Shinobu Nagahama, Koji Moriya, Junya Yamauchi
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Abstract
An optical fiber bundle for heat resistance and vacuum resistance which can be used even at a very high temperature or high vacuum is provided in economical manner. This is accomplished by a process for the production of an optical fiber bundle for heat resistance and vacuum resistance, which comprises making up optical fiber filaments each having a core part and a clad part into a bundle, closely fusion-bonding the end of the optical fiber bundle with a bonding glass and then subjecting the bonding glass to a crystallization treatment to increase the heat resistance.
Claims5
A process for the production of an optical fiber bundle which comprises assembling optical fiber filaments, each having a core and clad part, into a bundle, contacting the optical fiber bundle at an end thereof with a bonding glass. having a softening point lower than that of said optical fiber filaments, tightly fusion bonding the end of said optical fiber bundle with said bonding glass, and then subjecting said bonding glass to a crystallization treatment, said bonding glass having a glass composition comprising 20 to 30 weight % of TeO.sub.2, 12 to 30 weight % of Bi.sub.2 O.sub.3, 13 to 23 weight % of GeO.sub.2, 15 to 35 weight % of PbO, 0 to 12 weight % of La.sub.2 O.sub.3 and 0 to 20 weight % of Nb.sub.2 O.sub.5, provided that the sum of the amounts of La.sub.2 O.sub.3 and Nb.sub.2 O.sub.5 is in the range of 5.0 to 20.0 weight % and optionally at least one oxide component selected from the group consisting of Li, Na, K, Cs, Mg, Ca, Zn, Sr, Ba, Ti, Y, Zr, Ga, In, Sn, Sb, Tl, As, Al, Gd, Yb, Ta, W and P oxides.
Dependencies are inferred from the claim text.