Wavelength tracking apparatus and method for spectrum-sliced WDM PON

摘要

An object of the present invention is to provide a wavelength tracking apparatus and method in a spectrum-divided wavelength-division-multiplexed passive optical network.; According to the invention, the spectral wavelength tracking apparatus in the divided wavelength-division-multiplexing passive optical network, the reference voltage generation means extracts a portion of the multiplexed uplink signals to generate / output a reference voltage and the demultiplexer at least two stations which extracts a portion of the multiplexed upstream channels produce a voltage after the monitoring voltage generation means, the reference output a difference value between the voltage and the monitoring voltage and outputting a maximum voltage of said voltage to the monitor voltage which is output from the comparing means, and a control circuit for the thermoelectric cooler provides the demultiplexing unit a current proportional to the difference voltage of the reference voltage and the monitoring voltage is increased or decreased in the temperature of the demultiplexer portion of.