Optical fiber coupler exhibiting reduced polarization sensitivit

Details Optical fiber coupler exhibiting reduced polarization sensitivit Optical fiber coupler exhibiting reduced polarization sensitivit

1992-09-11

1993-10-05

Healy, Brian

Optical waveguides

With optical coupler

Particular coupling structure

385 42, 385 11, 385 51, 385123, 385141, 65 41, 65 42, 65 12, G02B 626, G02B 2320

Patent

active

052512770

ABSTRACT:
An overclad fiber optic coupler of the type wherein a plurality of optical optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. Surrounding the coupling region is a matrix glass body of refractive index n3 which is lower than the fiber cladding refractive index n.sub.2. The body has an inner region adjacent the optical fibers, an outer region having a radius greater than that of the inner region, and a transition region between the inner and outer regions. The softening point temperature of the inner region is greater than that of the outer region. The coupler exhibits both low polarization dependent loss and low excess loss.

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patent: 5179603 (1993-01-01), Hall et al.
patent: 5208883 (1993-05-01), Hattori et al.

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