宽带碲基掺铒光纤放大器多信道增益竞争的仿真分析

对新型宽带碲基掺铒光纤放大器(EDTFA)多信道问的增益演变关系进行了理论仿真。仿真结果表明：
EDTFA多信道问的增益存在着一个竞争过程，竞争的强弱取决于碲基掺铒光纤内的能级粒子数分布；当上能级粒子数处于反转分布态时，具有较大的发射截面与吸收截面差值的波长信道拥有相对较大的竞争优势，可获得相对较高的信号增益；当上能级粒子数处于未反转分布态时，具有较大的发射截面与吸收截面比值的波长信道拥有相对较大的增益竞争优势。

The slmu[ation analyses on gain relations among multi—channels of novel broad—band erbium—doped tellurite—based fibet amplifier(EDTFA)are presented theoretically．The simulation re．suits show that there is a gain competitive process am ong multi—channels which relied on the energy state popuhtion distribution of EDTFA．W hen the upper state population is reversed，the channel with greater difference of emission and absorption cross--section has bigger signal gain due to its competitive advan--tage．When the upper state population is not reversed ，the channel with greater ratio of emission and ab~rption cross-section has greater competitive advantage．