{'fraction_non_alphanumeric': 0.021372328458942633, 'fraction_numerical': 0.0044994375703037125, 'mean_word_length': 5.137931034482759, '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}}
Analysis of repetition-rate multiplication of mode-locked pulse trains using a linearly chirped fiber Bragg grating

The repetition rate multiplication based on the temporal fractional Talbot effect is one of the solutions to realize the high-repetition frequency optical pulse. In this paper, varying even-multiplications due to the theoretical different group velocity dispersions (GYDs) of the linearly chirped fiber Bragg grating (LCFBG) are calculated by another way. The characteristics of repetition-rate-multiplied pulse tram caused by different values of deviation of GVD are discussed. And the range within which the deviation of GVD must be limited during the fabricating of LCFBG for the case of M=4 is 5% when the FWHM of the original pulse train is 12 PS. The cascaded multiplication of repetition-rate using the same or different GVD LCFBGs are also theoretically explained.