Passive optical network
First Claim
Patent Images
1. A passive optical network comprising:
- a central office for generating downstream optical signals and receiving multiplexed upstream optical signals;
a plurality of optical network units for receiving corresponding downstream optical signals and for generating subcarrier channels carrying electrical data of assigned frequencies; and
a remote node having at least one converter for photoelectrically converting the channels into electrical data and for electro-optically converting the electrical data into at least one upstream optical signal,wherein the converter comprises;
an optical-to-electrical converter for photoelectrically converting corresponding subcarrier channels into electrical data;
an electrical-to-optical converter for electro-optically converting the electrical data converted by the optical-to-electrical converter into an upstream optical signal with an equal wavelength;
a first circulator for outputting the upstream optical signal converted by the electrical-to-optical converter to the central office and for outputting a corresponding downstream optical signal to a second circulator; and
the second circulator for outputting the corresponding downstream optical signal, which is received from the first circulator, to corresponding optical network units and for outputting the subcarrier channels from the corresponding optical network units to the optical-to-electrical converter.
1 Assignment
0 Petitions
Accused Products
Abstract
A passive optical network includes: a central office for generating multiplexed downstream optical signals and receiving an upstream optical signal; a plurality of optical network units for receiving a corresponding downstream optical signal and generating subcarrier channels carrying electrical data of an assigned frequency; and a remote node for photoelectrically converting the channels into electrical data, electro-optically converting the electrical data into at least one upstream optical signal.
5 Citations
12 Claims
-
1. A passive optical network comprising:
-
a central office for generating downstream optical signals and receiving multiplexed upstream optical signals; a plurality of optical network units for receiving corresponding downstream optical signals and for generating subcarrier channels carrying electrical data of assigned frequencies; and a remote node having at least one converter for photoelectrically converting the channels into electrical data and for electro-optically converting the electrical data into at least one upstream optical signal, wherein the converter comprises; an optical-to-electrical converter for photoelectrically converting corresponding subcarrier channels into electrical data; an electrical-to-optical converter for electro-optically converting the electrical data converted by the optical-to-electrical converter into an upstream optical signal with an equal wavelength; a first circulator for outputting the upstream optical signal converted by the electrical-to-optical converter to the central office and for outputting a corresponding downstream optical signal to a second circulator; and the second circulator for outputting the corresponding downstream optical signal, which is received from the first circulator, to corresponding optical network units and for outputting the subcarrier channels from the corresponding optical network units to the optical-to-electrical converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A passive optical network comprising:
-
a central office for generating multiplexed downstream optical signals and for receiving upstream optical signals; a remote node for splitting the downstream optical signals and for outputting upstream optical signals to the central office; a plurality of optical network units for receiving downstream optical signals and for generating subcarrier channels carrying electrical data of assigned frequencies; and at least one converter for photoelectrically converting the channels into electrical data, for electro-optically converting the electrical data into at least one upstream optical signal with an equal wavelength to output the converted upstream optical signal to the remote node, and for splitting a corresponding downstream optical signal to output the split downstream optical signals to corresponding linked optical network units, wherein the converter comprises; an optical-to-electrical converter for photoelectrically converting subcarrier channels input from the corresponding linked optical network units into each electrical data; an electrical-to-optical converter for electro-optically converting the electrical data converted by the optical-to-electrical converter into an upstream optical signal with an equal wavelength; and a first circulator for outputting the upstream optical signal converted by the electrical-to-optical converter to the remote node and for receiving the corresponding downstream optical signal from the remote node. - View Dependent Claims (10, 11, 12)
-
Specification