Burst-mode receiver equipped with optical amplifier, method for controlling optical amplifier, and system

摘要

To, even when a transmission wavelength varies in each ONU and an optical amplifier gain depends on the wavelength in an OLT equipped with an optical amplifier, prevent the optical amplifier gain from varying in every ONU and thus prevent deterioration of a dynamic range. The OLT estimates a transmission wavelength of each ONU at the time of ONU registration, and retains a correspondence between an ONU identifier and the transmission wavelength. Moreover, for every burst, an injection current to the optical amplifier is adjusted based on a wavelength and optical amplifier characteristic database.

主权项

1. An optical receiver unit connected to a plurality of optical network units (ONUs) via optical fiber and an optical splitter, comprising:
an optical amplifier that amplifies an input optical signal from one of the plurality of ONUs; a burst-mode optical receiver that converts an output of the optical amplifier into an electrical signal; a driver circuit that drives a drive injection current of the optical amplifier; a wavelength estimation unit that generates an estimated wavelength of the input optical signal; and an optical amplifier control unit that controls the drive injection current of the optical amplifier based on an acquired wavelength of the input optical signal and the estimated wavelength of the input optical signal.