Optical shock wave and photon-number conservationстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.
Аннотация:The nonlinear Schrödinger equation (NSE) provides a powerful tool for the analysis of ultrafast nonlinearoptical dynamics, including a vast class of optical solitons. Here, we show, however, that the photon-number integral of the NSE differs from the physical number of photons, conserved by more general field evolution equations. This difficulty is traced to the optical shock term, which is dropped in the NSE, making nonlinear coupling in NSE-based models frequency independent and leading to unphysical predictions for ultrabroadband, octave-spanning field waveforms.