Optical wavelength division node
First Claim
1. An optical wavelength division node connected with and provided between an optical line terminal (OLT) and a plurality of optical network unit (ONU), comprising:
- an optical splitter for receiving a downstream signal light source with a single wavelength transmitted by the OLT and splitting the received downstream signal light source into a first-path signal light source and a second-path signal light source;
a plurality of optical circulators sequentially and individually connected to each of the plurality of ONUs, wherein the optical circulator in a first-order position receives the first-path signal light source transmitted by the optical splitter and transmits the first-path signal light source received from the optical splitter to the ONU in a first-order position, so as to receive a return signal transmitted by the ONU in the first-order position and then pass the return signal received from the ONU in the first-order position to the optical circulator in a second-order position, until the optical circulator in a last-order position receives the return signal transmitted by the ONU in a last-order position and transmits the return signal received from the ONU in the last-order position; and
a colorless light source module for receiving the second-path signal light source transmitted by the optical splitter and the return signal transmitted by the optical circulator in the last-order position, and using the second-path signal light source to modulate the return signal received from the optical circulator in the last-order position to generate an upstream signal light source to be then transmitted back to the OLT by the optical splitter;
wherein the colorless light source module comprises at least two colorless light source transceivers, a first switch and a second switch;
wherein the first switch is connected with the two colorless light source transceivers and the optical circulator in the last-order position; and
wherein the second switch is connected with the two colorless light source transceivers and the optical splitter.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical wavelength division node includes an optical splitter, a plurality of optical circulators, and a colorless light source module. The optical splitter receives and splits a downstream signal light source into a first-path and a second-path signal light source. The optical circulator in a first-order position receives and transmits the first-path signal light source to an optical network unit in a first-order position, and receives a return signal and passes it to a next optical circulator, and finally the optical circulator in a last-order position receives the return signal and transmits it. The colorless light source module receives the second-path signal light source and the return signal transmitted by the optical circulator in a last-order position, and uses the second-path signal light source to modulate the return signal to generate an upstream signal light source to be transmitted to the optical line terminal by the optical splitter.
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Citations
7 Claims
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1. An optical wavelength division node connected with and provided between an optical line terminal (OLT) and a plurality of optical network unit (ONU), comprising:
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an optical splitter for receiving a downstream signal light source with a single wavelength transmitted by the OLT and splitting the received downstream signal light source into a first-path signal light source and a second-path signal light source; a plurality of optical circulators sequentially and individually connected to each of the plurality of ONUs, wherein the optical circulator in a first-order position receives the first-path signal light source transmitted by the optical splitter and transmits the first-path signal light source received from the optical splitter to the ONU in a first-order position, so as to receive a return signal transmitted by the ONU in the first-order position and then pass the return signal received from the ONU in the first-order position to the optical circulator in a second-order position, until the optical circulator in a last-order position receives the return signal transmitted by the ONU in a last-order position and transmits the return signal received from the ONU in the last-order position; and a colorless light source module for receiving the second-path signal light source transmitted by the optical splitter and the return signal transmitted by the optical circulator in the last-order position, and using the second-path signal light source to modulate the return signal received from the optical circulator in the last-order position to generate an upstream signal light source to be then transmitted back to the OLT by the optical splitter; wherein the colorless light source module comprises at least two colorless light source transceivers, a first switch and a second switch; wherein the first switch is connected with the two colorless light source transceivers and the optical circulator in the last-order position; and wherein the second switch is connected with the two colorless light source transceivers and the optical splitter. - View Dependent Claims (2, 3, 4)
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5. An optical wavelength division node interconnected and provided between an optical line terminal (OLT) and a plurality of optical network unit (ONU), comprising:
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a filter for receiving a downstream signal light source and a signal-free light source with different wavelengths transmitted by the OLT, and separately transmitting the received downstream signal light source and the signal-free light source received from the OLT; a plurality of optical circulators sequentially and individually connected to each of the plurality of ONUs, wherein the optical circulator in a first-order position receives the downstream signal light source transmitted by the filter and transmits the downstream signal light source received from the filter to the ONU in a first-order position, so as to receive a return signal transmitted by the ONU in the first-order position and pass the return signal received from the ONU in the first-order position to the optical circulator in a second-order position, until the optical circulator in a last-order position receives the return signal transmitted by the ONU in a last-order position and transmits the return signal received from the optical circulator in the last-order position; and a colorless light source module for receiving the signal-free light source transmitted by the filter and the return signal transmitted by the optical circulator in the last-order position, and using the signal-free light source to modulate the return signal received from the optical circulator in the last-order position to generate an upstream signal light source to be then transmitted back to the OLT by the filter; wherein the colorless light source module comprises at least two colorless light source transceivers, a first switch and a second switch; wherein the first switch is connected with the two colorless light source transceivers and the optical circulator in the last-order position; and wherein the second switch is connected with the two colorless light source transceivers and the filter. - View Dependent Claims (6, 7)
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Specification