Optical waveguides – With optical coupler – Plural
Patent
1994-12-22
1996-05-07
Bovernick, Rodney B.
Optical waveguides
With optical coupler
Plural
385 14, 385 37, 385 40, 385 46, G02B 626
Patent
active
055154603
ABSTRACT:
An apparatus is provided that allows the tunability of a waveguide bench router with a silicon-based material. This is accomplished by adding a triangular shaped layer of hydrogenated amorphous silicon (a-Si:H) as an active region across the waveguide. By varying a current across the triangle, the refractive index of the layer will change causing a change to the delay of the signal going across the material. Thus eliminated are the need for Group III-V elements or Lithium Niobate as the tunable element, increasing the coupling efficiency and decreasing cost.
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AT&T Corp.
Bovernick Rodney B.
Sanghavi Hemung
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