A pluggable bidirectional optical amplifier module may include preamp and booster optical amplifiers and a housing. The preamp optical amplifier may be configured to amplify optical signals traveling in a first direction. The booster optical amplifier may be configured to amplify optical signals traveling in a second direction. The housing may at least partially enclose the preamp optical amplifier and the booster optical amplifier. The pluggable bidirectional optical amplifier module may have a mechanical form factor that is compliant with a pluggable communication module form factor MSA. A colorless mux/demux cable assembly may be operated with the pluggable bidirectional optical amplifier. The colorless mux/demux cable assembly may include a 1:N optical splitter a N:1 optical combiner coupled side-by-side to the 1:N optical splitter, a first fiber optic cable optic cable, and a second fiber optic cable.

An optical signal processing method and apparatus. The method includes: obtaining a first sending signal, where the first sending signal is a signal that is sent by a first transmitter to a second receiver through a first optical fiber; determining estimation information of a backward optical signal based on the first sending signal; the backward optical signal is generated during transmission of the first sending signal, the backward optical signal is transmitted through at least one fiber section in the first optical fiber, and a transmission direction of the backward optical signal is opposite to a transmission direction of the first sending signal; and obtaining a second sending signal based on the estimation information of the backward optical signal. According to the embodiments, impact of the backward optical signal on effective signal transmission can be reduced, and a signal-to-noise ratio can be improved.

The systems, apparatuses and methods of the present invention set forth improvements to the problems of the current pairing or duplex paradigm, resulting in a dramatic increase in fiber transmission efficiency, accomplished explicitly by restructuring presently-aligned C-Band wavelengths into innovative DWDM transmit and receive formats, and through implementing photonic-wave changes, which directs Ethernet data flow onto new path adaptations. These improvements could reduce line haul expenses significantly, believed to reach a projected 50% less requirement/deployment of fiber strands. This saving would offer owner-operators substantial fiber strand cost reductions, affecting transportation rates of high-bandwidth digital payloads traversing over DWDM networks, and lower usage rates of cross-connections amid multiple equipment inter-exchanging throughout large data centers.

A bidirectional WDM optical communications link has WDM signals sent in opposite directions along a shared optical path and using at least one common wavelength. An optical amplifier (20, 21, 22, 70, A.sub.1.sup.D, A.sub.2.sup.U, A.sub.2.sup.D) optically amplifies (144) a first WDM signal separately from a second WDM signal in the other direction. This separated optical amplification is controlled (134) according to indications of transmission quality at the common wavelength, to alter the relative optical powers of the first and second WDM signals to enable crosstalk at the common wavelength to be limited. Cross talk at the common wavelength can be improved by rebalancing relative amounts of cross talk in the different directions, to enable the capacity benefits of using a common wavelength for both directions to be obtained while using greater optical signal power. This is particularly useful where the optical power is asymmetric, such as in WDM PON systems.

An optical device includes a first optical port connected to a first optical fiber, and a second optical port connected to a second optical fiber. The optical device further includes first optical components that switch first optical traffic carried via a first set of optical channels from the first optical port to the second optical port, and second optical components that switch second optical traffic carried via a second set of optical channels from the second optical port to the first optical port. The second set of optical channels includes different optical channels than the first set of optical channels. The optical device also includes a receiver that coherently detects portions of the first optical traffic and the second optical traffic, and converts the detected portions of the first and second optical traffic to electrical signals for delivery to a node or network external to the optical device.

The systems, apparatuses and methods of the present invention set forth improvements to the problems of the current pairing or duplex paradigm, resulting in a dramatic increase in fiber transmission efficiency, accomplished explicitly by restructuring presently-aligned C-Band wavelengths into innovative DWDM transmit and receive formats, and through implementing photonic-wave changes, which directs Ethernet data flow onto new path adaptations. These improvements could reduce line haul expenses significantly, believed to reach a projected 50% less requirement/deployment of fiber strands. This saving would offer owner-operators substantial fiber strand cost reductions, affecting transportation rates of high-bandwidth digital payloads traversing over DWDM networks, and lower usage rates of cross-connections amid multiple equipment inter-exchanging throughout large data centers.

The systems, apparatuses and methods of the present invention set forth improvements to the problems of the current pairing or duplex paradigm, resulting in a dramatic increase in fiber transmission efficiency, accomplished explicitly by restructuring presently-aligned C-Band wavelengths into innovative DWDM transmit and receive formats, and through implementing photonic-wave changes, which directs Ethernet data flow onto new path adaptations. These improvements could reduce line haul expenses significantly, believed to reach a projected 50% less requirement/deployment of fiber strands. This saving would offer owner-operators substantial fiber strand cost reductions, affecting transportation rates of high-bandwidth digital payloads traversing over DWDM networks, and lower usage rates of cross-connections amid multiple equipment inter-exchanging throughout large data centers.

The systems, apparatuses and methods of the present invention set forth improvements to the problems of the current pairing or duplex paradigm, resulting in a dramatic increase in fiber transmission efficiency, accomplished explicitly by restructuring presently-aligned C-Band wavelengths into innovative DWDM transmit and receive formats, and through implementing photonic-wave changes, which directs Ethernet data flow onto new path adaptations. These improvements could reduce line haul expenses significantly, believed to reach a projected 50% less requirement/deployment of fiber strands. This saving would offer owner-operators substantial fiber strand cost reductions, affecting transportation rates of high-bandwidth digital payloads traversing over DWDM networks, and lower usage rates of cross-connections amid multiple equipment inter-exchanging throughout large data centers.

An optical transmission apparatus is disposed at an end of a single-core optical fiber and is used when signal light is transmitted bidirectionally by the optical fiber. The optical transmission apparatus includes an optical transmitter that transmits a first signal light in one direction belonging to the signal light, an optical receiver that receives a second signal light in an opposite direction belonging to the signal light, an optical circulator that guides the first signal light transmitted from the optical transmitter to the optical fiber and guides the second signal light from the optical fiber to the optical receiver, and a light source that outputs, to the optical fiber, pump light for Raman-amplifying the second signal light to a second optical power higher than a first optical power of the first signal light.