{'fraction_non_alphanumeric': 0.018518518518518517, 'fraction_numerical': 0.0, 'mean_word_length': 6.378787878787879, '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}}
Progress in optical communications for commercial terrestrial telecommunication networks

The past decade has witnessed many advances that have considerably improved the capacity, span length between regenerators, network reliability, survivability, and flexibility, as well as moving optical technology to the local loop to provide cost effective multimedia services to subscribers. The device, component, and network architecture advances that resulted in this progress are described.