{'fraction_non_alphanumeric': 0.022033898305084745, 'fraction_numerical': 0.0, 'mean_word_length': 5.640449438202247, '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}}
Research on birefringence of asymmetric photonic crystal fiber

Birefringence of asymmetric photonic crystal fiber is investigated using the finite element method, under the circumstance of perturbation. By comparing the value of birefringence on the different value of large air-hole, the results indicate that when the intrinsic-birefringence is smaller, the random offset of hole-position has large influence on the birefringence. With the intrinsic-birefringence increasing, the little effect on birefringence regardless of the offset of hole-position or the variation of hole-diameter.