Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Patent
1996-10-11
1998-11-17
Healy, Brian
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
385123, 385126, 385142, 385144, G02B 602
Patent
active
058388664
ABSTRACT:
Improved single-mode optical waveguide fibers comprising a central core region, surrounded by an inner cladding region through which light at a chosen signal wavelength will propagate to an appreciable degree along with propagation of same in the central core region, the inner core region further surrounded by an outer cladding region, the improvement comprising germanium dioxide in the inner cladding region at a concentration within the range of about 0.005 percent by weight to about 1 percent by weight of said inner cladding region, effective to significantly reduce the concentration of oxygen atoms in the inner cladding region which are available to form defects that cause hydrogen-induced attenuation. Also provided are core preforms, overclad preforms, and processes for making the fibers, core preforms and overclad preforms.
REFERENCES:
Influence of Trace amounts of germania on the loss performance of silica core fibers; K. T. Nelson, P.J. Lemaire, Kenneth L. Walker, K. J. Wesser, AT&T Bell Laboratores, 600 Mountain Ave., Murray Hill, NJ 07974; H.T. Shang, AT&T Bell Laboratories, Norcross GA 30071; OFC/100C '87/Wednesday Morning 137, No Month.
Antos A. Joseph
Hunt Timothy L.
Powers Dale R.
Whedon William A.
Corning Incorporated
Healy Brian
Servilla Scott S.
Simmons William J.
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