Dynamic segmented DFOS systems and methods operating on bidirectional wavelength division multiplexed (WDM), multi-span optical fiber links using network reconfigurable optical add-drop multiplexers (ROADMs). A distributed sensing interface module (DSIM) is inserted at existing network switching nodes which utilize ROADMs. Operationally, DFOS probe signals occupy one of WDM channel which is switched by the ROADMs in a bidirectional fiber network. The DSIM collects backscattered/reflected sensing signals in one direction, and routes them to an add port of the ROADM in the other direction for conveyance to a DFOS interrogatorafter optical filtering and amplification.

An optical transmitter capable of colorless WDM includes a source of optical frequency comb (OFC) light having a plurality of separate optical frequency tones, and a plurality of optical modulators connected in parallel to modulate different parts of the OFC light with corresponding modulating signals, each of the parts including the plurality of separate optical frequency tones. An optical combiner combines the different parts of the OFC light to obtain an output optical signal of the optical transmitter. MIMO processing may be used to recover the modulating signals at an optical receiver using, or to configure the modulating signals at the transmitter so that each of the frequency tones is modulated with a corresponding target data signal.

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 disclosed.

An electro-optical chip includes a plurality of transmit macros, each of which includes an optical waveguide and a plurality of ring resonators positioned along the optical waveguide. An optical distribution network is implemented onboard the electro-optical chip. The optical distribution network has a plurality of optical inputs and a plurality of optical outputs. The optical distribution network conveys a portion of light received at each and every one of the plurality of optical inputs to each of the plurality of optical outputs, such that light conveyed to each of the plurality of optical outputs includes all wavelengths of light conveyed to the plurality of optical inputs. Each of the plurality of optical outputs is optically connected to the optical waveguide in a corresponding one of the plurality of transmit macros. The electro-optical chip is optically connected to a remote optical power supply.

Embodiments of the present disclosure relate to an optical-layer module, an access site, and an optical signal processing method in the field of optical communication technologies. An example access site includes a first fiber interface, a first splitter, a first wavelength blocker, a first multiplexer, and a second fiber interface. The first fiber interface is configured to receive a first optical signal, where the first optical signal includes an optical signal of at least one wavelength. The first splitter is configured to: split the first optical signal into N+1 second optical signals, send one of the N+1 second optical signals to the first multiplexer through a pass-through output port of the first splitter, and send remaining N second optical signals through N wavelength-drop ports. The first wavelength blocker is configured to receive N third optical signals, where wavelengths of the N third optical signals are different.

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