OPTICAL FIBER AMPLIFIER HAVING HIGH OUTPUT TRANSFORMATION EFFICIENCY

摘要

PURPOSE: An optical fiber amplifier is provided to improve an efficiency in a signal profit and a pumping output by using an amplify voluntary emitting light as a second pumping source. CONSTITUTION: The optical fiber amplifier having a first optical fiber part to be optical pumped and a second optical fiber part not to be optical pumped includes a recycling tool for using a voluntary emitting light as a second pumping source against the second optical fiber part. The recycling tool includes furthermore a wavelength division multiplexed connector inserted between the first optical fiber part and the second optical fiber part and an optical pumping tool connected with the wavelength division multiplexed connector. The first and the second fiber part are made of Erbium doped fiber amplifier.