{'fraction_non_alphanumeric': 0.008319467554076539, 'fraction_numerical': 0.0, 'mean_word_length': 5.08080808080808, '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}}
Strength degradation and recovery during zero-stress aging of fused silica optical fibers

The two-point bending technique has been used to measure the strength of both polymer coated and bare fibers in liquid nitrogen after the fibers were first aged in an aggressive environment followed by a drying process. The results show that some strength recovery occurs upon drying of polymer coated samples while continuing degradation was seen when drying bare samples. The healing process observed for coated fiber is thought to be caused by condensation of the hydrated surface layer formed during aging.