APPARATUS FOR INSERTING AND EXTRACTING OPTICAL SIGNAL

摘要

PURPOSE: An apparatus for inserting and extracting an optical signal is provided to make its structure simple in comparison with an optical circulation apparatus by utilizing an optical divide coupling device and an optical fiber Bragg grating in place with an optical circulation apparatus and a Bragg grating. CONSTITUTION: An apparatus(400) for inserting and extracting an optical signal includes an optical inputting and extracting block, an optical transmitting and reflecting block and an optical signal insertion/extracting block. The optical inputting and extracting block inputs an optical signal of wavelength divisional multiplex multi-wavelength and outputs the optical signal by dividing the optical signal corresponding to the set coupling ratio among the inputted multi-wavelength optical signals. The optical inputting and extracting block extracts the optical signal of a specific wavelength reflected from the outputted optical signals. The optical transmitting and reflecting block reflects the optical signal of the specific wavelength among the multi-wavelengths of the optical signals outputted from the optical inputting and extracting block. The optical transmitting and reflecting block transmits the optical signal of the remaining wavelengths. And, the optical signal insertion/extracting block outputs the optical signal by dividing the optical signal corresponding to the set coupling ratio among the inputted optical signals of multi-wavelengths and inserts the optical signal having a specific wavelength.