In this article, we experimentally demonstrate an all-fiber optical amplifier using Bi-doped phosphosilicate fiber (BPSF) operating in both the O-band and the E-band, providing >20 dB gain from 1345 to 1460 nm for an input signal power of −23 dBm. A maximum gain of 31 dB with a noise figure (NF) of 4.8 dB was achieved at 1420 nm for −23 dBm input signal, whereas for an input signal power of −10 dBm it was 26 dB with a NF of 5.3 dB. The in-band OSNR of the proposed Bi-doped fiber amplifier (BDFA) was >22 dB from 1345 to 1460 nm for a −23 dBm input signal. The gain coefficient was found to be 0.04 dB/mW for a −23 dBm input signal. Also, the temperature dependent gain and NF performance of the BDFA within −40 to +60 °C were characterized. The temperature-dependent-gain (TDG) coefficient for a −23 dBm input signal was found to be −0.015 dB/°C at a signal wavelength of 1420 nm where the BDFA gain is maximum, while for an input signal power of −10 dBm it was −0.01 dB/°C at 1420 nm. The TDG coefficient of the proposed BDFA from 1350–1460 nm was in the range from −0.079 to −0.008 dB/°C. The BDFA gain and NF performance were also measured and compared using BPSFs with different unsaturable loss (UL) characteristics.

中文翻译：

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超宽带掺铋光纤放大器，在 O 和 E 波段覆盖 115 nm 带宽

在本文中，我们通过实验演示了使用双掺杂磷硅酸盐光纤 (BPSF) 在 O 波段和 E 波段工作的全光纤光放大器，在 1345 至 1460 nm 范围内为输入信号功率提供 >20 dB 增益−23 dBm。对于 -23 dBm 输入信号，在 1420 nm 处实现了 31 dB 的最大增益和 4.8 dB 的噪声系数 (NF)，而对于 -10 dBm 的输入信号功率，它是 26 dB，噪声系数 (NF) 为 5.3 dB。对于 -23 dBm 输入信号，所提出的双掺杂光纤放大器 (BDFA) 的带内 OSNR 从 1345 到 1460 nm > 22 dB。对于 -23 dBm 输入信号，发现增益系数为 0.04 dB/mW。此外，还表征了 -40 至 +60 °C 内 BDFA 的温度相关增益和 NF 性能。发现 -23 dBm 输入信号的温度相关增益 (TDG) 系数为 -0。在 BDFA 增益最大的 1420 nm 信号波长下为 015 dB/°C，而对于 -10 dBm 的输入信号功率，在 1420 nm 处为 -0.01 dB/°C。所提出的 BDFA 在 1350–1460 nm 范围内的 TDG 系数在 -0.079 到 -0.008 dB/°C 的范围内。还使用具有不同不饱和损耗 (UL) 特性的 BPSF 测量和比较了 BDFA 增益和 NF 性能。