Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-01-04
2005-01-04
Vo, Tuyet (Department: 2821)
Optical waveguides
With optical coupler
Input/output coupler
C372S006000, C385S031000
Reexamination Certificate
active
06839485
ABSTRACT:
A particular focusing arrangement in a dual fiber collimator improves the transmission efficiency and ease of alignment of the collimator. In particular, the collimator includes two optical fibers mounted in a dual-fiber ferrule. The fiber end-faces are co-planar with the angle-polished end-face of the ferrule and displaced along the optical axis of the ferrule. The collimator unit also includes a first focusing element centered along the optical axis of the ferrule and positioned such that its back front focal point is between the two end faces of the fibers. An advantage provided by this arrangement is that by changing the fiber polish angle and polish azimuth, relative to a line connecting the fiber centers, superior coupling from one fiber to the other can be achieved, even with different working distances and at various wavelengths.
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Gardner Timothy S.
Gerber Ronald E.
Treptau Jeffrey P.
ADC Telecommunications Inc.
Carlson, Caspers Vandenburgh & Lindquist
Vo Tuyet
Vy Hung Tran
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