Hitless errorless trimmable dynamic optical add/drop multiplexer devices
First Claim
1. A hitless dynamic add/drop multiplexer comprising a continuously tunable reflective filter disposed within an optical waveguide segment, said optical waveguide segment having a first end and a second end, an optical circulator or optical coupler disposed at each end of said optical waveguide segment and optically coupled thereto, and at least one by-pass waveguide coupled to said waveguide segment by an optical switching means.
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Abstract
The present invention is generally directed to integrated optical add/drop multiplexer devices in which light of a specific wavelength (or specific wavelengths) can be added to or dropped from a main fiber optic line. An actuation mechanism (e.g., heat) is used to tune and/or trim the devices. Some proposed architectures provide for tuning of the adding and dropping of channels in a hitless manner, a manner that is non-disruptive to other wavelength channels.
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11 Claims
- 1. A hitless dynamic add/drop multiplexer comprising a continuously tunable reflective filter disposed within an optical waveguide segment, said optical waveguide segment having a first end and a second end, an optical circulator or optical coupler disposed at each end of said optical waveguide segment and optically coupled thereto, and at least one by-pass waveguide coupled to said waveguide segment by an optical switching means.
Specification