SiO.sub.2 -based alkali-doped optical fiber

Details SiO.sub.2 -based alkali-doped optical fiber SiO.sub.2 -based alkali-doped optical fiber

1991-11-12

1992-09-08

Lee, John D.

Optical waveguides

Having particular optical characteristic modifying chemical...

Of waveguide core

G02B 616

Patent

active

051465345

ABSTRACT:
It has been discovered that glass of composition xM.sub.2 O.(1-x)SiO.sub.2 can have lower intrinsic loss than pure SiO.sub.2, for 0<x.ltorsim.0.03 and M=Na, K, and/or Rb. Furthermore, it has been discovered that co-doping with F can increase the range of reduced intrinsic loss to x.about.0.07, for M=K and/or Rb. Disclosed is optical fiber that comprises the novel low intrinsic loss glass,, typically in the core.

REFERENCES:
patent: 3971645 (1976-07-01), Bachmann et al.
patent: 4275951 (1981-06-01), Beales et al.
patent: 4277270 (1981-07-01), Krohn
patent: 4666247 (1987-05-01), MacChesney et al.
"Rayleigh and Brillouin Scattering in K.sub.2 O-SiO.sub.2 Glasses", by J. Schroeder et al., Journal of The American Ceramic Society, vol. 56, No. 10, pp. 510-514, Oct. 1973.
"Treatise on Materials Science and Technology", vol. 12, M. Tomozawa et al., editors, Academic Press, 1977, pp. 183-184.

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