- Patent Title: Methods and apparatus for separating the wavelength switching function from the channel equalization function in a reconfigurable optical add/drop multiplexer (ROADM)
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Application No.: US15392227Application Date: 2016-12-28
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Publication No.: US10341039B1Publication Date: 2019-07-02
- Inventor: Essam Tony Keddis
- Applicant: Juniper Networks, Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Juniper Networks, Inc.
- Current Assignee: Juniper Networks, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Cooley LLP
- Main IPC: H04B10/079
- IPC: H04B10/079 ; H04Q11/00 ; H04J14/02
Abstract:
In some embodiments, an apparatus includes a reconfigurable optical add-drop multiplexer (ROADM). The ROADM has a wavelength selective switch (WSS) that does not perform power equalization when the WSS is operative. The ROADM also has a first pre-amplifier, a first channel power equalizer operatively coupled to the first pre-amplifier, a second pre-amplifier operatively coupled to the first channel power equalizer and the WSS, a first post-amplifier operatively coupled to the WSS, a second channel power equalizer operatively coupled to the first post-amplifier, and a second post-amplifier operative coupled to the second channel power equalizer.
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