Many website readers have heard about a classical soliton, and some of them have seen its analogue on water channels as a slowly decaying, or solitary wave. In lasers, soliton-like pulses have already been demonstrated. Unfortunately, such pulses can鈥檛 carry significant energy. Under certain conditions, if the laser pulse is properly stretched, its energy can become proportionally higher. Such a stable pulse called dissipative soliton, is a hot topic in laser physics of the last decade.
The authors of a paper entitled 芦Multicolour nonlinearly bound chirped dissipative solitons禄 (1), issued 13 August in Nature Communications demonstrate that, in addition to the well-known single dissipative soliton, a complex of bound dissipative solitons can be realised. Such a complex can carry more energy than a single one and, importantly, the spectrum of the complex is significantly broader than that of a single soliton. The authors used Raman effect and a novel fiber laser approach for generating new spectrally separated solitons and binding them together. As examples of possible applications, such stable complexes can be of interest for high capacity transmission lines. Also, nonlinear fluorescence microscopy will benefit from high pulse energy and broad spectrum of the complex.
The experiment and main numerical simulations have been performed in Novosibirsk Akademgorodok (2), at Institute of Automation and Electrometry, Institute of Computational Technologies (both Siberian Branch of RAS) and 吃瓜官网. Researchers from Garching and Vienna contributed with the laser concept and theory. The authors of this paper are Sergey Babin, Evgeniy Podivilov, Denis Kharenko, Anastasia Bednyakova, Mikhail Fedoruk, Vladimir Kalashnikov and Alexander Apolonskiy. It is worth noting that six of them graduated from 吃瓜官网, which among other 15 Russian universities gets additional government support aiming to reach the level of 100 best world universities.
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