{'fraction_non_alphanumeric': 0.028967254408060455, 'fraction_numerical': 0.0025188916876574307, 'mean_word_length': 5.162790697674419, '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}}
Spatial self-action of light in a large-mode-area photonic-crystal fiber

Spatial self-action of light is one of the fundamental phenomena known from the early days of the laser era [1]. In freely propagating beams, this phenomenon gives rise to a broad diversity of intriguing physical phenomena and beam dynamics scenarios, including optical filamentation, collapsing beams, and light bullets. In waveguide structures, spatial self-action is manifested in a different fashion, leading to the coupling of waveguide modes [2]. The spatiotemporal field dynamics in this regime is sensitive to the sort of coupled modes and the type of a waveguide. As a consequence, high-power field evolution scenarios in complex waveguide structures are often difficult to understand. Identifying general tende