WAVELENGTH TRANSFORMATION SYSTEM FOR INCREASING EXTINCTION RATIO OF OPTICAL SIGNAL AND WAVELENGTH TRANSFORMATION BANDWIDTH

摘要

PURPOSE: A wavelength transformation system for increasing an extinction ratio and a wavelength transformation bandwidth of an optical signal is provided to increase an extinction ratio and a wavelength transformation bandwidth of an optical signal by coupling a wavelength transformation process due to a four-wave mixing phenomenon of a semiconductor optical amplifier and a wavelength transformation process due to a four-wave mixing phenomenon of a distributed transaction fiber. CONSTITUTION: The first wavelength transformer(100) receives a DFB(Distributed FeedBack) semiconductor laser beam and a variable wavelength semiconductor laser beam and performs a wavelength transformation process due to a four-wave mixing phenomenon of a semiconductor optical amplifier. The second wavelength transformer(110) receives an output signal of the first wavelength transformer(100) and the variable wavelength semiconductor laser beam and performs a wavelength transformation process due to the four-wave mixing phenomenon of a distributed transaction fiber.