OPTICAL ATTENUATOR AND FABRICATION METHOD THEREOF

摘要

An optical attenuator and/or optical terminator is provided. The device includes an optical channel having two regions with different optical properties, such as an undoped silicon region which is less optically absorptive and a doped silicon region which is more optically absorptive. Other materials may also be used. A facet at the interface between the two regions is oriented at a non-perpendicular angle relative to a longitudinal axis of the channel. The angle can be configured to mitigate back reflection. Multiple facets may be included between different pairs of regions. The device may further include curved and/or tapers to further facilitate attenuation and/or optical termination.

主权项

1. An optical attenuator comprising:
a channel having a longitudinal axis, the channel comprising a first portion in contact with a second portion to define a facet therebetween, the second portion and the first portion both aligned along the longitudinal axis in a vicinity of the facet, wherein the facet extends across the channel and the longitudinal axis thereof and is at least partially oriented at a non-perpendicular angle relative to the longitudinal axis, and wherein the first portion and the second portion have equal cross-sectional areas in the vicinity of the facet.