| 摘要 |
<p>The invention relates to a system and method of dispersion measurement in an optical fibre network, said network comprising at least first and second nodes connected by a length of optical fibre, the method comprising the steps of:(a) setting the second node such that a receiver can receive at least two different wavelengths »1 and »2; (b) transmitting from the first node two consecutive bursts of data at different wavelengths »1 and »2, wherein each burst of data comprises a unique sequence of amplitude modulated data, and wherein the two sequences are injected with a fixed known delay; (c) receiving at the second node the two consecutive bursts of data; (d) measuring the relative delay between the two unique sequences of data each one contained in one of the received bursts of data; (e) calculating the dispersion of the optical fibre from one or more of the following: the measured relative delay, the fixed known delay, the length of the fibre and the at least two different wavelengths. The dispersion measurements method of the present invention is based on walk off and bit position detection between two wavelengths suitable for fast optical burst switching network is described. This method does not require an operator, extra equipment, or traffic interruption.</p> |
