| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform a control of variable wavelength dispersion compensation control at high speed and high accuracy so as to minimize a code error rate caused by signal transmission. <P>SOLUTION: A wavelength dispersion compensation control device includes an error correction means for correcting a code error of a signal from an optical transmission line, a variable wavelength dispersion compensator for changing wavelength dispersion characteristics based on this error correction information and performing a dispersion compensation of the optical transmission line, and a control means for performing a control of the variable wavelength dispersion compensator based on the number of error corrections that is the error correction information so that this error correction number becomes the minimum, wherein the control means, when scanning the dispersion at predetermined step widths in a variable range of the variable wavelength dispersion compensator, increases a dispersion setting value at the variable wavelength dispersion compensator while the step width is set as ΔD1 when an error correction success and failure information that is the error correction information is failure, and increases the dispersion setting value while the step width is set as ΔD2 (ΔD1≥ΔD2) when the error correction success and failure information is success. <P>COPYRIGHT: (C)2008,JPO&INPIT |
