{'fraction_non_alphanumeric': 0.03171247357293869, 'fraction_numerical': 0.0, 'mean_word_length': 5.2368421052631575, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Ultrashort solitons at the minimum-dispersion wavelength: effects of fourth-order dispersion.

The effects of fourth-order dispersion on optical-fiber-guided ultrashort solitons are examined. It is shown that the solitons decay as a result of dispersive radiation, the nature of which is analyzed. An exact pulse solution is presented, and its properties are evaluated. Finally, the combined effects of fourth-order dispersion and intrapulse Raman scattering are discussed.