摘要:
An optical remodulator includes: a polarization diversity modulator (15) configured to modulate an input optical signal to generate an output optical signal by using a first optical modulator (22) implemented for a first polarization state and a second optical modulator (23) implemented for a second polarization state that is orthogonal to the first polarization state; a photo detector (12) configured to optical-to-electrical convert the input optical signal or the output optical signal or both of the optical signals into an electric signal; and a drive signal generator (14) configured to generate a first drive signal that drives the first optical modulator and a second drive signal that drives the second optical modulator based on the electric signal generated by the photo detector.
摘要:
An optical remodulator includes: a polarization diversity modulator (15) configured to modulate an input optical signal to generate an output optical signal by using a first optical modulator (22) implemented for a first polarization state and a second optical modulator (23) implemented for a second polarization state that is orthogonal to the first polarization state; a photo detector (12) configured to optical-to-electrical convert the input optical signal or the output optical signal or both of the optical signals into an electric signal; and a drive signal generator (14) configured to generate a first drive signal that drives the first optical modulator and a second drive signal that drives the second optical modulator based on the electric signal generated by the photo detector.
摘要:
A method for optical signal amplification in an optical communication system is presented. The optical communication system comprises an optical line terminal, a plurality of optical network units, an optical splitter and a plurality of circulators. The optical network units comprise each an optical amplifier. A first optical signal is sent in a downstream direction from the optical line terminal to a first circulator from the plurality of circulators. The first optical signal is further sent from the first circulator to a first optical network unit from the plurality of optical network units and it bypasses the optical splitter. The first optical signal is amplified in the optical amplifier of the first optical network unit to generate an amplified optical signal. The amplified optical signal is sent from the first optical network unit to the first circulator through the optical splitter and is further sent from the first circulator to a further of the plurality of optical network units.
摘要:
A hybrid service terminal for use in a passive fiber optic network comprises a plurality of optical fiber connectors, each coupled to a respective optical fiber for receiving downstream optical frames from an Optical Line Terminal (OLT); a plurality of hybrid fiber/copper connectors, each of the hybrid fiber/copper connectors coupled to a respective one of the plurality of optical fiber connectors; and a plurality of electrical connectors configured to receive electrical signals from a multi-line converter module over a respective one of a plurality of electrical conductors. One of the plurality of hybrid fiber/copper connectors is configured to provide the downstream optical frames to the multi-line converter module for conversion to the electrical signals. Each of the plurality of electrical connectors is coupled to a respective one of the plurality of hybrid fiber/copper connectors for providing the electrical signals over a respective metallic drop cable coupled to a respective network terminal at a corresponding customer premise.
摘要:
An optical regenerator (OR2) for regenerating optical signals, comprising a first regenerator receiver (RR1) for receiving a first optical signal (OS1) and a second regenerator receiver (RR2) for receiving a second optical signal (OS2), the optical regenerator (OR2) further comprising: • a first optical to electrical device (OE1) adapted for cooperating with the first regenerator receiver (RR1) for converting the first optical signal (OS1) into a first electrical signal (ES1), • a second optical to electrical device (OE2) adapted for cooperating with the second regenerator receiver (RR2) for converting the second optical signal (OS2) into a second electrical signal (ES2), • a signals combiner (SC), adapted to combine the first electrical signal (ES1) and the second electrical signal (ES2) for generating a combined electrical signal (CES), • an electrical to optical device (EO1) for converting the combined electrical signal (CES) into the combined optical signal (COS) • a regenerator transmitter (RT1), for transmitting the combined optical signal (COS).
摘要:
An assembly (100, 220, 300) that includes a laser diode (110, 310) and a driver circuit (120) that operates to give the assembly an (100, 220, 300) adjustable impedance. The driver circuit (120) adjusts impedance by repeatedly alternating between two operational phases (131,132). In one operational phase (131), current is primarily or fully supplied through the laser diode (110, 310) using a first current path (151) being from the first supply node (121), to the laser diode (110, 310), and into the second supply node (122). In the other operational phase (132), current is supplied through the laser diode (110, 310) using a recirculating second current path. The current through the laser diode increases during the first operational phase (131), and decays during the second operational phase (132). For a given applied voltage level between the first and second supply nodes (121, 122), the duty cycle (D1, D2) of the first and second operational phases (131, 132) may be adjusted so that the current through the laser diode (110, 310) is approximately a target current.