Abstract

Global data traffic is continuously growing year by year. In this regard, telecom companies faced the problem of increasing data transmission rate, which is becoming more and more challenging. One of options that could help to increase optical links capacity is an expansion of the spectral range of DWDM systems used in telecom by inclusion of the O-band and/or the E-band. An ability to engage these spectral ranges directly related to the presence of suitable effective optical amplifiers. In this work, we studied different modifications of Bi-doped fiber amplifier operating in the O- and E-bands in order to obtain the widest gain spectrum in a single device. In particular, one- and two-wavelength pumping and gain-clamped schemes, as well as usage of a Bi:P $_\text {2}$ O $_\text {5}$ -SiO $_\text {2}$ and Bi:GeO $_\text {2}$ -SiO $_\text {2}$ fibers combination, were considered. As a result, an amplifier with 150 nm –6 dB bandwidth, $>$ 25 dB peak gain operating in the range from $\sim$ 1300 to $\sim$ 1450 nm was developed. To achieve the highest spectral width, we compare a gain-clamped at 1280 nm cavity pumped at 1180 nm with dual pump scheme at 1180 nm and 1270 nm along with a combination of active media composed of Bi:P $_\text {2}$ O $_\text {5}$ -SiO $_\text {2}$ and Bi:GeO $_\text {2}$ -SiO $_\text {2}$ fibers.

Pump-efficient flattop O+E-bands bismuth-doped fiber amplifier with 116 nm –3 dB gain bandwidth

Yan Ososkov, Aleksandr Khegai, Sergei Firstov, Konstantin Riumkin, Sergey Alyshev, Alexander Kharakhordin, Alexey Lobanov, Alexey Guryanov, and Mikhail Melkumov
Opt. Express 29(26) 44138-44145 (2021)

Bi-doped fiber amplifiers in the E + S band with a high gain per unit length

Siyi Wang, Ziwei Zhai, Arindam Halder, and Jayanta K. Sahu
Opt. Lett. 48(21) 5635-5638 (2023)

Cladding pumped bismuth-doped fiber amplifiers operating in O-, E-, and S-telecom bands

Alexander Vakhrushev, Aleksandr Khegai, Sergey Alyshev, Konstantin Riumkin, Alexander Kharakhordin, Elena Firstova, Andrey Umnikov, Alexey Lobanov, Fedor Afanasiev, Aleksei Guryanov, Mikhail Melkumov, and Sergei Firstov
Opt. Lett. 48(6) 1339-1342 (2023)

Bi-doped fiber amplifier with a flat gain of 25 dB operating in the wavelength band 1320–1360 nm

N. K. Thipparapu, A. A. Umnikov, P. Barua, and J. K. Sahu
Opt. Lett. 41(7) 1518-1521 (2016)

Bi-doped fiber amplifiers and lasers [Invited]

N. K. Thipparapu, Y. Wang, S. Wang, A. A. Umnikov, P. Barua, and J. K. Sahu
Opt. Mater. Express 9(6) 2446-2465 (2019)