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日本NTT光电子研究所在世界上最先试制成可将1.31μm频段光信号不需变换成电信号,而对光原样放大的添镨(Pr)氟化物光纤放大器,并成功地放大到30dB(1000倍)。
Japan NTT Institute of Optoelectronics the first trial in the world can be 1.31μm band optical signal without converting into electrical signals, while the optical amplification of the original Pr (Pr) fluoride fiber amplifier, and successfully amplified to 30dB ( 1000 times).