A WAVELENGTH TUNABLE MULTI-WAVELENGTH FIBER LASER SCHEME USING A SINGLE LASER PUMP

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wavelength division or frequency division multiplexing structure for broadband optical communication, wherein an output of a single pump light source LD is input to a wavelength division multiplexer (WDM-C) to a multi-branch optical coupler (1 × N coupler). Erbium-doped optical fibers (EDFs) in different branched paths are pumped and wavelength-variable optical filters (TF) are inserted in each of the optical paths to form a tunable multi-wavelength fiber laser and generate different wavelengths from different paths. In order to reduce the interference with the laser modes of the wavelength and to stabilize the laser output, an optical isolator (ISO) is used for each optical path, and the mode beating between the wavelength modes is adjusted so that the multi-wave laser oscillation An optical attenuator (Atn) is used to make it possible, and the variable fiber coupler (VC) has a function of adjusting the coupling ratio of the laser resonator to maximize the output of the fiber laser. By using the wavelength tunable multi-wavelength fiber laser composition using a single pump light source, which is configured to serve as an output terminal, a multi-wavelength laser output with wavelength variability can be obtained, and the number of parts can be reduced more than in the conventional method. B or improve the laser output characteristics and provide a better composition. The laser output wavelength of each wavelength can be changed independently, and this wavelength-variable multi-wavelength fiber laser can be applied as a light source for the generation of optical signals at new wavelengths by wavelength division multiple optical communication and four-wave mixing. It is expected to contribute to the development.