PASSIVE OPTICAL NETWORK ENABLING WAVELENGTH TUNING AND WAVELENGTH TUNING METHOD THEREFOR

摘要

The present invention provides a wavelength division multiplexing passive optical network, which is more simplified than that of a conventional method, and a method for tuning the wavelength of an optical signal in an optical communication network. In addition, provided are a wavelength tuning method without a wavelength locker, and an optical communication network and communication method, which allows the reception sensitivity of a wavelength tunable signal to be improved.