Multi-band programmable gain Raman amplifier

Uiara Celine de Moura; Md Asif Iqbal; Morteza Kamalian; Lukasz Krzczanowicz; Francesco Da Ros; Ann Margareth Rosa Brusin; Andrea Carena; Wladek Forysiak; Sergei Turitsyn; Darko Zibar

doi:10.1109/jlt.2020.3033768

arXiv · 2006.12280

Multi-band programmable gain Raman amplifier

Uiara Celine de Moura·Md Asif Iqbal·Morteza Kamalian·Lukasz Krzczanowicz·Francesco Da Ros·Ann Margareth Rosa Brusin·Andrea Carena·Wladek Forysiak·Sergei Turitsyn·Darko Zibar

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Abstract

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 $\sim$53.5THz (365nm) with loss below 0.4dB/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 from 3.5 to 30 dB, in an ultra-fast way and a very low maximum error of 1.6e-2 dB/THz over an ultra-wide bandwidth of 17.6-THz (140.7-nm).

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Uiara Celine de Moura, Md Asif Iqbal, Morteza Kamalian, Lukasz Krzczanowicz, Francesco Da Ros, Ann Margareth Rosa Brusin, Andrea Carena, Wladek Forysiak, Sergei Turitsyn, Darko Zibar. 2020-10-23. Multi-band programmable gain Raman amplifier. https://doi.org/10.1109/jlt.2020.3033768

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