CC BY
12*
ALT'23 The 30th International Conference on Advanced Laser Technologies
LS-I-6
Advances in bismuth-doped fiber lasers and amplifiers
M.A. Melkumov
Prokhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 38
Vavilov str., 119333 Moscow, Russia
Email: [email protected]
Bi-doped fiber is a new optical material providing possibilities of broadband optical amplification in the near IR range where other silica based active fibers doped with rare-earth elements are absent or inefficient. Variation of glass composition and pump wavelength allows one to obtain luminescence and gain of bismuth active centers (BAC) associated with Al, P, Si or Ge in several regions within 1.1-1.8^,m (see Fig. 1). Combination of different BACs and/or Er ions in separate fibers connected in chain or co-doped in one fiber (BDF or EBDF) allows one to significantly (up to 150 nm or larger) increase the available bandwidth for single optical amplifier [1,2] with acceptable noise figure (Fig. 1). One of important applications of such active fibers is ultrabroadband fiber telecom systems with the dense wavelength division multiplexing of optical channels where bismuth-doped fiber amplifiers (BDFA) help to increase fiber reach and capacity by several times in comparison with passive systems (without optical amplification) or active one based on erbium-doped fiber amplifiers (EDFA).
1300 1400 Wavelength,
Fig. 1. Normalized gain (lines) and noise figure (symbols) of various BDFA, EDFA and EBDFA
Starting from 2017 a successful BDFA assisted data transmission for in lab systems in O, E and S- telecom bands (for example see ref. [3]) as well as for deployed fiber links have been demonstrated. All these results were obtained for core-pumped scheme of BDFA and bismuth-doped fiber lasers (BDFL), which require complex and/or cost inefficient single-mode pump sources. Recently a significant progress towards cladding-pumped BDFL and BDFA have been demonstrated [4,5].
This talk aims to highlight latest results in the field of BDFL and BDFA and their possible applications.
This research was supported by the Russian Science Foundation (grant # 22-19-00708).
[1] Y. Ososkov, et al., Pump-efficient flattop O+E-bands bismuth-doped fiber amplifier with 116 nm -3 dB gain bandwidth, Opt. Express, vol.29, pp. 44138-44145, (2021).
[2] A. Khegai, et al., Gain Clamped Bi-Doped Fiber Amplifier With 150 nm Bandwidth for O-and E-Bands, Journal of Lightwave Technology, vol.40(4), pp. 1161-1166, (2022).
[3] M. Melkumov, et al., E - band data transmission over 80 km of non - zero dispersion fibre link using bismuth - doped fibre amplifier, Electronics Letters, vol.53(25), pp. 1661-1663, (2017).
[4] S. Firstov, et al., Cladding-Pumped Bismuth-Doped Fiber Laser, Optics Letters, vol.47(4), pp. 778-781, (2022).
[5] A. Vakhrushev, et al., Cladding pumped bismuth-doped fiber amplifiers operating in O-, E-, and S-telecom bands, Optics Letters, Vol.48(6), pp. 1339-1342, (2023).
