OPTICAL NETWORK MONITORING SYSTEM AND METHOD THEREOF
First Claim
1. An optical network monitoring system, comprising:
- an optical line terminal having a wavelength variable light source, for transmitting a first optical signal;
a plurality of optical interference devices, for being passed by the first optical signal and reflecting back a plurality of second optical signals corresponding to the optical interference devices respectively to the optical line terminal, wherein the second optical signals have different optical path differences;
a beam splitter unit connected to the optical line terminal and the optical interference devices via optical fiber respectively, for distributing and transmitting the first optical signal to the optical interference devices;
an optical/electrical converter unit, for converting each of the second optical signals into an electrical signal; and
a spectrum analyzing unit, for analyzing the electrical signal to extract a frequency component of the electrical signal.
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Abstract
An optical network monitoring system and method thereof are proposed. An optical line terminal (OLT) transmits a first optical signal to a plurality of optical interference devices. After the first optical signal passes the optical interference devices, the optical interference devices reflect back a plurality of second optical signals corresponding to the optical interference devices respectively to the optical line terminal. The second optical signals have different optical path differences. An optical/electrical converter unit converts each of the second optical signals into an electrical signal. A spectrum analyzing unit analyzes the electrical signal to extract a frequency component of the electrical signal, thus the fiber connection status to each optical network unit in the optical network system could be obtained. Therefore, the purpose of monitoring the optical network system is achieved.
20 Citations
20 Claims
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1. An optical network monitoring system, comprising:
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an optical line terminal having a wavelength variable light source, for transmitting a first optical signal; a plurality of optical interference devices, for being passed by the first optical signal and reflecting back a plurality of second optical signals corresponding to the optical interference devices respectively to the optical line terminal, wherein the second optical signals have different optical path differences; a beam splitter unit connected to the optical line terminal and the optical interference devices via optical fiber respectively, for distributing and transmitting the first optical signal to the optical interference devices; an optical/electrical converter unit, for converting each of the second optical signals into an electrical signal; and a spectrum analyzing unit, for analyzing the electrical signal to extract a frequency component of the electrical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical network monitoring method, comprising steps of:
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a first optical signal being transmitted from an optical line terminal to a plurality of optical interference devices; a plurality of second optical signals corresponding to the optical interference devices being reflected back to the optical line terminal after the optical interference devices are passed by the first optical signal, wherein the second optical signals have different optical path differences; and receiving and analyzing each of the second optical signals which are reflected from the optical interference devices by the optical line terminal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification