MULTICAST SIGNAL TRANSMISSION SYSTEM USING WAVELENGTH MODULATION FILTER ON WDM-PON

摘要

The present invention relates to a multicast signal transmission system using a wavelength modulation filter in a wavelength division multiplexing passive optical subscriber network. The present invention relates to a center comprising a parver-ferot laser diode 308, an optical cable 318, and an optical rotator 315. A base station 310; A broadband incoherent light source 309; A wavelength modulating filter 313 (AOTF); An acoustic optical modulation filter control unit 314 for controlling the wavelength modulation filter 313; Single mode optical fiber 324; An optical cable 323 connecting the optical rotator 315 and the single mode optical fiber 324; Waveguide grating 325 of the remote distribution node; It is composed of subscriber devices (329 ~ 330) and the cost-effective and difficult to transmit broadcast signal and multicast signal due to the point-to-point connection characteristics generated in the wavelength division multiplexing passive optical subscriber network It is a useful invention with the particular advantage of minimizing light loss.