Wavelength Selectors in all Optical Networks

With the development of the optical communication,especially the wide application of wavelength division multiplexing(WDM) technology,optical cross connection(OXC) technology and optical add/drop multiplexing(OADM) technology have received more and more attention.Wavelength selection devices play an extremely important role because of their choice freedom of different wavelengths of function in above two kinds of technology.The present research of several typical wavelength selection devices is introduced in this paper,and their features are analyzed and compared.