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US 2025/0155643 A1Published application
Alternating filter stack assembly for multiplexer and demultiplexer applications
AssigneeCisco Technology, Inc.
InventorIman HASSANI NIA
Life of this patent
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Abstract
A multiplexer and demultiplexer (MDM) is disclosed. In one aspect, an MDM includes a plurality of filters arranged along a propagation direction. Each one of the filters has a thin-film filter (TFF) supported by a substrate. The filters are arranged so that each filter induces an opposite warpage of an optical signal traversing along the propagation direction than an immediately preceding filter.
Claims20
A multiplexer and demultiplexer (MDM), comprising:
- a plurality of filters arranged along a propagation direction of an optical signal, each one of the plurality of filters having a thin-film filter (TFF) supported by a substrate, and
- wherein the plurality of filters are arranged so that each filter of the plurality of filters induces an opposite warpage of the optical signal traversing along the propagation direction than an immediately preceding filter of the plurality of filters.
A multiplexer and demultiplexer (MDM), comprising:
- a plurality of filters arranged along a propagation direction, each one of the plurality of filters having a thin-film filter (TFF) supported by a substrate, and
- wherein the plurality of filters are arranged so that the TFFs have alternating concave and convex curvatures along the propagation direction.
A multiplexer and demultiplexer (MDM), comprising:
- a filter block;
- and
- a plurality of filters arranged along a propagation direction of an optical signal in a first stack and a second stack spaced from the first stack by the filter block, each one of the plurality of filters has a thin-film filter (TFF) supported by a substrate, and
- wherein the optical signal traverses between the first stack and the second stack in an alternating manner, and
- wherein the plurality of filters are arranged so that a second filter of the plurality of filters arranged in the second stack induces an opposite warpage of an optical signal traversing along the propagation direction than a first filter of the plurality of filters arranged in the first stack.
2 more elements
Dependencies are inferred from the claim text.