5 results about "Optical add-drop multiplexer" patented technology

An optical apparatus, with an optical interconnect, the optical interconnect including a first optical transceiver having a first notch filter, the first notch filter including first and second optical add drop multiplexer demultiplexers connected to receive a continuous wave light beam and send a first and second filtered wavelengths to first and second resonant modulators which send first and send modulated optical signals through a light propagation path. The second filtered wavelength is different from the first filtered wavelength, and the second modulated optical signal has a polarity that is orthogonal to a polarity of the first modulated optical signal. Methods of communicating using the apparatus and an optical filter for use in an optical transceiver are also

An optical add drop multiplexer, OADM, includes a first west port (W1) coupled to a first east port (E1) by a first filter arrangement, the first filter arrangement including a plurality of filter elements and a second west port (W2) coupled to a second east port (E2) by a second filter arrangement to provide a second optical signal path, the second filter arrangement including a plurality of filter elements. The OADM also comprises an interconnection arrangement switchable between: a first mode in which the add ports (A1-A6) are coupled to respective filter elements of the first filter arrangement and the drop ports (D1-D6) are coupled to respective filter elements of the second filter arrangement; and a second mode in which some of the add ports (A1-A6) and some of the drop ports (D1-D6) are coupled to respective filter elements of the first filter arrangement or the second filter arrangement.

This disclosure describes techniques for Optical Add Drop Multiplexers (OADMs) that apply asymmetrical filtering to allow for individual channels within a channel group to be independently added / dropped or passed through. In one example, an optical add-drop multiplexer includes a first input port configured to receive an input signal having a first wavelength channel, a second wavelength channel, and a third wavelength channel; a demultiplexer having a first filter configured to: pass the first wavelength channel and the second wavelength channel, and filter the third wavelength channel; a multiplexer having a second filter configured to: pass the second wavelength channel and the third wavelength channel, and filter the first wavelength channel; and a first output port configured to output an output signal comprising the second wavelength channel of the input signal.

This disclosure describes techniques for Optical Add Drop Multiplexers (OADMs) that apply asymmetrical filtering to allow for individual channels within a channel group to be independently added / dropped or passed through. In one example, an optical add-drop multiplexer includes a first input port configured to receive an input signal having a first wavelength channel, a second wavelength channel, and a third wavelength channel; a demultiplexer having a first filter configured to: pass the first wavelength channel and the second wavelength channel, and filter the third wavelength channel; a multiplexer having a second filter configured to: pass the second wavelength channel and the third wavelength channel, and filter the first wavelength channel; and a first output port configured to output an output signal comprising the second wavelength channel of the input signal.

This disclosure describes techniques for an optical add / drop multiplexer (OADM) that applies asymmetric filtering to allow individual channels within a channel group to be independently added / split or passed. In one example, an optical add / drop multiplexer includes a first input port configured to receive an input signal having a first wavelength channel, a second wavelength channel, and a third wavelength channel; a demultiplexer having a first filter configured to pass through the first wavelength channel and the second wavelength channel, and to filter the third wavelength channel; a multiplexer having a second filter configured to pass through a second wavelength channel and a third wavelength channel, and to filter the first wavelength channel; and a first output port configured to output an output signal of a second wavelength channel including the input signal.