BANDWIDTH CONTROLLABLE FILTER USING ONE TILTED CHIRPED GRATING AND ITS APPLICATION TO FILTERING METHOD

摘要

The invention WDM (Wavelength Division Multiplexing) relates to a bandwidth control filters used in the system, in particular approximately in an inclined chirp selectively removing or passing only wavelength components in the specific band by using an optical fiber grating having a filter characteristic of the square-shaped bandwidth throttling filter using slanted fiber grating chirp and was able to relate to the filtering method using the same.; The present invention to this, choose the oblique chirp fiber grating, a circulator, a band apply a tension to the chirp fiber grating the tilted for bandwidth control of the incident light source in both directions of the inclined chirp fiber grating, and the selected portion a fiber elongation and obtain an electric signal to be attached comprises a piezoelectric element to apply a tension to the fiber elongation sphere. According to the present invention can be very useful for WDM optical communication system, the network management by providing a bandwidth control filters jinige a more accurate and sufficient bandwidth for a specific wavelength band light source.