8 results about "Polarization mode dispersion" patented technology

The invention discloses a compensation method and device with robustness under a polarization effect, equipment and a storage medium, belongs to the technical field of communication, and solves the problem that the robustness of a communication system is affected under the existing factors such as rapid polarization state disturbance. A compensation method with robustness under a polarization effect comprises the following steps that S1, a transmitting end processing module generates a polarization multiplexing signal, and a pair of pilot frequencies is inserted in each of two polarization directions of the polarization multiplexing signal to obtain a transmitting end signal; s2, sending the sending end signal to a receiving end digital processing module through a link with a polarization effect, extracting a damage matrix at an insertion position by the receiving end digital processing module according to the pilot frequency, and calculating differential group delay and polarization loss according to a channel matrix, and constructing a damage compensation matrix and completing compensation of the link with the polarization effect. The method provided by the invention has high robustness under the condition that polarization rotation and polarization mode dispersion are damaged in a polarization state.

This invention provides a low-crosstalk signal demodulation device and method for fiber optic laser communication, belonging to the field of fiber optic communication technology. The device includes a fiber optic signal input port, an optical circulator, a polarization beam splitter / combiner module, a balanced photodetector unit, a low-noise amplification and quadrature demodulation module, an adaptive crosstalk cancellation unit, a MIMO equalization and decision unit, and a digital signal output port, connected in series according to the signal flow direction. It also includes a crosstalk monitoring and feedback unit bidirectionally connected to the low-noise amplification and quadrature demodulation module, the adaptive crosstalk cancellation unit, and the MIMO equalization and decision unit. This invention, employing the aforementioned low-crosstalk signal demodulation device and method for fiber optic laser communication, overcomes the limitations of traditional single-domain crosstalk suppression. Through the synergistic effect of optical path, circuit, and algorithm layers, it effectively suppresses crosstalk caused by multi-channel multiplexing, polarization mode dispersion, and backscattering, significantly improving demodulation accuracy, anti-interference capability, and system stability.

A method and system of measuring the PMD of an optical fiber under test (FUT). A polarization-sensitive optical time domain reflectometer (POTDR) is used to inject into the FUT and from a proximal end thereof, a test signal comprising a series of repeated light pulses and detecting a corresponding polarization-analyzed return light signal coming back from the optical fiber and representing back-reflected light from a light reflector connected to a distal end of the FUT. The plurality of polarization-sensitive acquisitions defines at least one pair of acquisitions performed with mutually different but closely-spaced wavelengths and substantially the same state of polarization (SOP). The process may be repeated for a plurality of pairs of acquisitions performed with at least one of a plurality of mutually-different center wavelengths and a plurality of mutually-different SOPs, and a value of the PMD for the FUT is calculated therefrom.

A silicon-photonics co-packaged optical connector (CPO) is disclosed. The connector provides combined multiple shell lens facet with total internal multi-light-path tunneling. Total optical reflection at the multiple lenses ensures minimal loss, preserved polarization mode dispersion (PMD) and controlled numerical aperture (NA). The shell lens design is inspired by the chirality of seashell symmetry when placed in reference to a symmetry axis and the ensuing special flexibility. An exemplary manufacturing process of the CPO with shell lens is also disclosed.

A silicon-photonics co-packaged optical connector (CPO) is disclosed. The connector provides combined multiple shell lens facet with total internal multi-light-path tunneling. Total optical reflection at the multiple lenses ensures minimal loss, preserved polarization mode dispersion (PMD) and controlled numerical aperture (NA). The shell lens design is inspired by the chirality of seashell symmetry when placed in reference to a symmetry axis and the ensuing special flexibility. An exemplary manufacturing process of the CPO with shell lens is also disclosed.

The present application relates to a reticle cartridge having a retention through a reticle compartment wall. The reticle cartridge includes an outer portion including a cartridge door and a cartridge dome, and an inner portion including a bottom plate and a cover. One of the base plate or the cover includes a reticle compartment wall extending toward the other of the base plate or the cover. The reticle compartment wall includes one or more retention features. The cartridge door or the cartridge dome includes one or more actuation surfaces configured to contact the retention feature. The retention feature is configured to be moved by contact with the actuation surface. The retaining feature may be in a position, the positions are configured to secure a reticle within the inner portion of the reticle cartridge when the reticle cartridge is assembled by engaging the base plate with the cover, placing the engaged base plate and the engaged cover within the cartridge dome, and securing the cartridge door to the cartridge dome.

The application discloses a polarization mode dispersion-tolerant dispersion monitoring method and system and electronic equipment, and the method comprises the following steps: firstly, calculating the spectrum autocorrelation function of the X polarization of an input optical signal; determining the first time-domain pulse sequence of the spectrum autocorrelation function on the X polarization according to the spectrum autocorrelation function of the X polarization; calculating the spectrum cross-correlation function between the X polarization and the Y polarization of the input optical signal; determining the second time-domain pulse sequence on the spectrum cross-correlation function according to the spectrum cross-correlation function; determining the pulse peak position according to the first time-domain pulse sequence and the second time-domain pulse sequence; and determining the dispersion value of the target optical signal according to the pulse peak position. The application can tolerate polarization mode dispersion and polarization state rotation, and can be widely applied to the technical field of coherent optical communication.