OPTICAL TRANSMISSION SYSTEM, CONTROLLER FOR WAVELENGTH TUNABLE FILTER, AND CONTROL METHOD OF WAVELENGTH TUNABLE FILTER

摘要

There is proved an optical transmission system including: a transmitter configured to transmit an optical signal modulated with a discrete multi-tone (DMT) drive signal; a filter capable of changing a wavelength of the optical signal input from the transmitter; a monitor configured to monitor a power of the optical signal passed through the filter; and at least one processor configured to: set a center wavelength of the filter, shift the center wavelength, detect a change in the power monitored by the monitor, identify a carrier component of the optical signal based on the change in the power, and control a relative relationship between a transmission characteristic of the filter and a wavelength of the carrier component so that the carrier component is included in the optical signal and one of an upper sideband and a lower sideband of the optical signal is at least partially removed by the filter.

主权项

1. An optical transmission system comprising:
an optical transmitter configured to transmit an optical signal modulated with a discrete multi-tone (DMT) drive signal; a wavelength tunable filter capable of changing a wavelength of the optical signal input from the optical transmitter; a power monitor configured to monitor a power of the optical signal passed through the wavelength tunable filter; and at least one processor configured to: set a center wavelength of the wavelength tunable filter, shift the center wavelength, detect a change in the power monitored by the power monitor, identify an optical main carrier component of the optical signal based on the change in the power, and control a relative relationship between a transmission characteristic of the wavelength tunable filter and a wavelength of the optical main carrier component so that the optical main carrier component is included in the optical signal and one of an upper sideband and a lower sideband of the optical signal is at least partially removed by the wavelength tunable filter.