期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 39, 期 2, 页码 429-438出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.3033768
关键词
Optical attenuators; Optical pumping; Bandwidth; Nonlinear optics; Pump lasers; Stimulated emission; Machine learning; multi-band systems; neural networks; optical amplifiers; optical communications
资金
- European Union [754462, 814276]
- European Research Council under ERC CoG FRECOM Grant [771878]
- Villum Foundations under VYI OPTIC-AI Grant [29344]
- UK EPSRC [EP/M009092/1, EP/R035342/1]
- EPSRC [EP/R035342/1, EP/M009092/1] Funding Source: UKRI
This paper experimentally demonstrates a multi-band (S+C+L) programmable gain optical amplifier using only Raman effects and machine learning. The amplifier achieves >1000 programmable gain profiles within an ultra-wide bandwidth range of 17.6 THz (140.7 nm) in an ultra-fast way.
Optical communication systems, operating in C-band, are reaching their theoretically achievable capacity limits. An attractive and economically viable solution to satisfy the future data rate demands is to employ the transmission across the full low-loss spectrum encompassing O, E, S, C, and L band of the single mode fibers (SMF). Utilizing all five bands offers a bandwidth of up to similar to 53.5 THz (365 nm) with loss below 0.4 dB/km. A key component in realizing multi-band optical communication systems is the optical amplifier. Apart from having an ultra-wide gain profile, the ability of providing arbitrary gain profiles, in a controlled way, will become an essential feature. The latter will allow for signal power spectrum shaping which has a broad range of applications such as the maximization of the achievable information rate x distance product, the elimination of static and lossy gain flattening filters (GFF) enabling a power efficient system design, and the gain equalization of optical frequency combs. In this paper, we experimentally demonstrate a multi-band (S+C+L) programmable gain optical amplifier using only Raman effects and machine learning. The amplifier achieves >1000 programmable gain profiles within the range 3.5 to 30 dB, in an ultra-fast way and a very low maximum error of 1.6 . 10(-2) dB/THz over an ultra-wide bandwidth of 17.6-THz (140.7-nm).
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