{'fraction_non_alphanumeric': 0.026153846153846153, 'fraction_numerical': 0.009230769230769232, 'mean_word_length': 5.08411214953271, '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}}
New Process for Fluoride Glass Preform Fabrication Using Chemical Vapor Deposition

A new process for ZrF4-based fluoride glass preform fabrication is proposed. For the first time, ZrF4-based fluoride glass soot (ZrF4-BaF2-LaF3-AIF3) has been prepared by CVD using metal β-diketonates and hydrogen fluoride gas as starting materials and fluorinating reagent, respectively. The fluoride glass soot has been consolidated into a transparent glass layer with residual closed pores. The new process using CVD is applicable to the preparation of fluoride glass preforms. It is promising for the realization of ultra-low loss and long-length optical fibers.