1986-02-12
1988-09-13
Lee, John
350 9630, 65 311, G02B 616
Patent
active
047704942
ABSTRACT:
Certain dopant materials, when present in a significant power-carrying portion of a silica-based optical waveguide fiber, are effective as intrinsic loss-reducing agents; the concentration of such dopant materials is at significantly lower levels as compared with levels used for producing a refractive index difference. Suitable in this respect are germania and phosphorus pentoxide as added to essentially pure silica or to silica containing other dopant additives such as, e.g., alumina or fluorine as may be used in a waveguiding core-cladding structure. Intrinsic loss in the vicinity of 0.2 dB/km is readily realized.
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patent: 4616901 (1986-10-01), MacChesney et al.
"Long Wavelength Performance of Optical Fibres Co-Doped with Fluorine", Electronics Letters, J. Irven et al., vol. 17, No. 1, 1981, pp. 3-5.
Csencsits Roseann
Lemaire Paul J.
Nelson Katherine T.
Walker Kenneth L.
American Telephone & Telegraph Company AT&T Bell Laboratories
Businger Peter A.
Lee John
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