Patent
1984-12-03
1987-01-06
Lee, John
350 9631, 350 9615, 350 9632, G02B 616
Patent
active
046342184
ABSTRACT:
A single mode optical waveguide and method for making same in which the equivalent of a core and cladding portions are made of the same material. The outer portion of the waveguide includes a tube which imposes a compressive stress through intermediate elements onto a central region of the waveguide, raising its index of refraction of that central region above that of the adjacent outer portions. The tube and other elements have different thermal coefficients of expansion and may have different freezing temperatures so that the outer elements are pressed against the core portion as the waveguide cools. A vise-like device may be used to maintain compression on the central portion and a part of the outer tube may be removed to provide for laterally coupling the waveguide with another waveguide.
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Caufield Francis J.
Lee John
Polaroid Corporation
Rushin, III Lester
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