Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-03-08
2005-03-08
Frech, Karl D. (Department: 2876)
Optical waveguides
With optical coupler
Particular coupling structure
C385S015000, C385S039000
Reexamination Certificate
active
06865323
ABSTRACT:
The invention relates to an optical coupling device that provides passive compensation for a shift in center wavelength due to a change in ambient temperature. A conventional solution is to mount one of the elements to be coupled on a pedestal or cantilevered arm, which has a coefficient of thermal expansion (CTE) different from a frame fixed relative to the other of the elements to be coupled. Unfortunately, these devices do not provide consistent results over long periods of time, due to uncontrolled movement of the outer free end of the cantilevered arm or pedestal. The present invention provides an expansion arm fixed on one end to a frame, a holder on the other end of the expansion arm, and a pair of flexible arms connecting the holder to the frame. This arrangement enables the expansion arm to freely expand in a first direction, while greatly restricting movement in any other direction. The present invention also relates to a optical coupling device that includes a expansion arm with an adjustable effective length. Furthermore, optical coupling devices are disclosed that include an expansion arm for moving a lens relative to one or more waveguides providing thermal compensation.
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Koerdt Michael
Milinkovic Vlatko
Oliver Steven
Samiec Dirk
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Frech Karl D.
JDS Uniphase Corporation
JDS Uniphase Inc.
Taylor April
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