摘要:
The present invention relates to an interface and method for enabling interconnection of a host device and a small-formfactor pluggable module. The interface comprises a host device connector (52) arranged to receive a mating small-formfactor pluggable module connector (51) and a switching device (53, 54) connected to the host device connector and arranged to selectively switch at least one signal carried over the host device connector between at least two separate signal paths (56, 57) of the host device depending on a selected switching mode of the switching device.
摘要:
A system for delivering optical power over optical conduits includes at least one optical power source delivering multiple optical power forms to multiple outlet nodes in a variety of applications.
摘要:
A multi-core optical fiber includes a plurality of core portions, and a cladding portion positioned at outer peripheries of the plurality of core portions, the cladding portion having a refractive index lower than a maximum refractive index of each of the core portions, in which each of the core portions propagates light only with predetermined number, which is equal to or greater than 2, of propagation modes, and an effective core area at wavelength of 1550 nm of each of the propagation modes is equal to or greater than 120 µm 2 . Preferably, the predetermined number is 2. By doing this, a multi-core optical fiber and an optical transmission system are provided which can increase transmission capacity more than conventional technology.
摘要:
A passive optical network comprises a first node configured to transmit a downlink data signal over a communication channel of an optical link, the communication channel having a first wavelength, and a second node configured to transmit an uplink data signal over the optical link using the communication channel having the first wavelength. The first node and/or the second node is adapted to perform at least one monitoring measurement on the communication channel having the first wavelength, and provide monitoring information, comprising the at least one monitoring measurement, in a monitoring channel. Common public radio interface (CPRI) traffic can therefore be transported over an optical transport network (OTN), by using a frequency reuse technique to provide a symmetrical bi-directional communication link between a first node and a second node, and using a frame structure of the optical transport network to provide a monitoring channel.
摘要:
An optical transmission system includes: a plurality of transmitters that output an optical signal having a frequency different from each other; a process unit that adds a reference signal to at least two of the optical signals, the reference signal having a frequency width narrower than that of the two optical signals, an interval of central frequencies of the reference signals being narrower than that of the two optical signals, a multiplexer that multiplexes optical signals output by the plurality of transmitters; an extract unit that extracts a beat signal generated between the reference signals because of a multiplexing of the multiplexer; and an adjust unit that adjusts a frequency interval of the two optical signals in accordance with an extract result of the extract unit.
摘要:
The invention relates to a system for the certification of a passive optical network and for the detection of problems and faults in the last fibre legs, which is suitable for use in passive optical networks which, between the OLT device housed in a telephone central office and the user device of ONT, includes optical dividers or splitters which, in the downward direction, distribute the optical signal to all of the users within a tree-and-branch architecture, and in the upward direction, combine the optical signals from all of the ONTs. The system is based on the incorporation of a group of devices known as an OLT emulator and a remote testing unit which are joined to the corresponding wall socket of the telephone central office and user, such that the remote testing unit is positioned facing an OLT in operation, allowing the certification of the last leg of the optical network and the detection of problems and faults in a PON network in operation.
摘要:
Methods, systems, and devices are described for a digital demodulator device for processing received optical signals. The device may include a quadrature error filter that receives a digitized version of an optical signal, and removes quadrature errors to generate a filtered series of data samples. The device may also include a frequency offset removal module for performing frequency rotation on the filtered series of data samples. The device may include a chromatic dispersion compensation module which removes chromatic dispersion from horizontal and vertical polarization channels. The device may include a polarization mode dispersion (PMD)/polarization dependent loss (PDL) compensation module which compensates for interference caused by PMD and PDL. The device may also include a phase recovery module configured to track and correct phase.
摘要:
In a Wavelength Division Multiplexed Passive Optical Network (WDM-PON) including, a system for overlaying an analog broadcast signal. An Optical Line Terminal of the WDM-PON includes a broadband light source for generating uplink seed light for each uplink channel of the WDM-PON, and a modulator for modulating the analog broadcast signal onto the uplink seed light. An Optical Network Terminal of the WDM-PON receives the uplink seed light from the Optical Line Terminal, and includes an optical divider for dividing the received seed light into a first signal and a second signal; a light source for generating an uplink data signals using the first signal as seed light; and an RF receiver for detecting the analog broadcast signal modulated on the second signal.