APPARATUS AND METHOD FOR COMPENSATING GAIN SPECTRUM IN RESPONSE TO TEMPERATURE CHANGE OF OPTICAL AMPLIFIER AND LONG-WAVELENGTH BAND DISPERSION-COMPENSATING HYBRID OPTICAL AMPLIFIER PROVIDED WITH THE SAME

摘要

PURPOSE: An apparatus and a method for compensating the gain spectrum in response to the temperature change of an optical amplifier and a long-wavelength band dispersion-compensating hybrid optical amplifier provided with the same are provided to easily compensate the change of gain spectrum in response to the temperature change by changing the intensity of the DCF pump. CONSTITUTION: An apparatus for compensating the gain spectrum in response to the temperature change of an optical amplifier includes a dispersion compensating fiber(DCF)(50), at least one pumping units(30-34), a first and a second temperature detection units(60,61) and a controller(70). The DCF is positioned between the first amplifying terminal and the second amplifying terminal to compensate the distribution of the optical signal outputted from the first amplifying terminal. The DCF performs the Raman amplification for the inputted pumping light. The pumping units supply the forward and backward pumping lights to the DCF. The first and the second temperature detection units detect the temperature changes of the detected first and the second amplifying terminals. And, the controller controls the intensity of the pumping light in response to the temperature changes of the detected first and the second amplifying terminals.