{'fraction_non_alphanumeric': 0.02676659528907923, 'fraction_numerical': 0.017130620985010708, 'mean_word_length': 4.736196319018405, '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}}
Dynamics of dissipative soliton resonance square pulses in fiber lasers

In this article, we experimentally investigate the dynamics of dissipative soliton resonance (DSR) square pulses in different all-anomalous passively mode-locked double-clad Er:Yb fiber laser setups. In the figure-of-eight configuration, the aim of employing an amplifier in each loop is to control the output pulse's amplitude and width, which depend on the pumping power. At a maximum total pumping power of 4.7 W and a fundamental frequency of 133 kHz, 10 µJ DSR square pulses with a signal-to-noise ratio of 60 dB, are generated without observing any wave-breaking. In the fiber ring configuration, by fixing the pumping power to 1.18 W and carefully adjusting the polarization controllers, we obtain a DSR square pulse that can be split in a series of equally spaced smaller square pulses up to the 4th harmonic order at a fundamental frequency of 672 kHz.