OPTICAL FIBER MULTI-WAVELENGTH FILTER AND A SPECTRUM WAVELENGTH CONTROL METHOD USING THE SAME FOR PREVENTING DURABILITY OF A FILTER FROM BEING DEGRADED

摘要

PURPOSE: An optical fiber multi-wavelength filter and a spectrum wavelength control method using the same are provided to tune a channel wavelength of a filter through injection current modulation by installing a coil type heater in a optical fiber.;CONSTITUTION: A coil heater(11) is arranged in a polarization maintaining optical fiber(10). A temperature of the polarization maintaining optical fiber is controlled through a current injected in the coil heater. A polarized light phase includes a polarized light beam splitter(13) and a polarization controller(14). The polarization controller includes a 1/2 wave plate(14a) and a 1/4 wave plate(14b).;COPYRIGHT KIPO 2013