本征平坦增益带宽>33nm的高增益、低噪声L-波段铒光纤放大器

L-band Erbium Doped Fiber Amplifier with Intrinsic Gain Flattering Bandwidth of >33 nm

对掺铒光纤L-波段的增益谱特性进行了理论模拟与实验,确定了形成平坦增益谱的最佳粒子数反转条件(～40％);采用两段级连分配抽运放大光路,小信号增益>36dB,最低噪声系数<4.4dB,在不加增益平坦滤波器的条件下,23±0.5dB的本征平坦增益带宽达到33.5nm(1569～1602.5nm)。

The characteristics of L-band erbium doped fiber are investigated by numerical simulation and experiment. Gain spectrum is flat on optimum population inversion level (-40% ). High gain ( >36 dB) and low noise ?.4 dB) are achieved with dual-stage configuration. The flattened amplification bandwidth is 33.5 nm ( ± 0.5 dB) (1569 -1602.5 nm) without gain equalized filter (GEF).