Zhai Ziwei, Sahu Jayanta K
Opt Lett. 2024 Jun 15;49(12):3308-3311. doi: 10.1364/OL.525583.
We present a double-pass bismuth (Bi)-doped fiber amplifier (BDFA) providing high-gain wideband amplification from 1330 to 1480 nm. A peak gain of 38 dB with 4.7 dB noise figure (NF) was obtained at 1420 nm for a -23 dBm input signal, with >20 dB gain from 1335 to 1475 nm. We achieved 30 and 21.5 dB peak gains with 122 nm (1341-1463 nm) and 140 nm (1333-1473 nm) 6 dB-gain bandwidth for -10 and 0 dBm input signal, respectively. For a 0 dBm signal, the power conversion efficiency (PCE) reached 23.7%, and the in-band optical-signal-to-noise ratio (OSNR) across the wideband BDFA was >44 dB. Also, the absorption and luminescence characteristics have been studied for different Bi-doped phosphosilicate fibers (BPSFs) fabricated in-house.
我们展示了一种双程铋（Bi）掺杂光纤放大器（BDFA），它能在1330至1480 nm范围内提供高增益宽带放大。对于-23 dBm的输入信号，在1420 nm处获得了38 dB的峰值增益和4.7 dB的噪声系数（NF），在1335至1475 nm范围内增益大于20 dB。对于-10和0 dBm的输入信号，我们分别在122 nm（1341 - 1463 nm）和140 nm（1333 - 1473 nm）的6 dB增益带宽下实现了30 dB和21.5 dB的峰值增益。对于0 dBm的信号，功率转换效率（PCE）达到23.7%，宽带BDFA的带内光信噪比（OSNR）大于44 dB。此外，还对内部制造的不同铋掺杂磷硅酸盐光纤（BPSF）的吸收和发光特性进行了研究。
