National Natural Science Foundation of China [61975130, 61605044]; ScientificResearch Fund of Hunan Provincial Education Department [18A341, 19A067]; Basic and Applied Basic Research Foundation of Guangdong Province [2021A1515010084]
机构署名：
本校为第一机构
院系归属：
物理与电子工程学院
摘要：
We investigate the impact of Raman scattering on pure quartic solitons (PQSs) in an optical fiber with quartic dispersion. An analytical expression of the Raman-induced frequency shift (RWS) of a PQS is obtained by using the variational approach with the Gaussian function ansatz. We find the RIFS of a PQS is inversely proportional to the sixth power of pulse width, when the fiber is short enough. The RWS of a PQS is more sensitive to the pulse width, compared with that of a conventional soliton which is inversely proportional to the fourth power of pulse width. The theoretical predictions show...
