{'fraction_non_alphanumeric': 0.030042918454935622, 'fraction_numerical': 0.05150214592274678, 'mean_word_length': 4.367816091954023, '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}}
Narrow-band mirrors for a new type 1300-nm He-Ne laser

An approach to the design and fabrication of the mirrors for a new type 1300 nm He-Ne laser is described. In addition to special reflectance at the central wavelength, these mirrors must be not only hard surface with lower loss, but also narrowband, and have lower reflectance at 1150 nm, 1500 nm, 1700 nm, 3390 nm wavelength and so on. Moreover, optical coatings on the mirrors can withstand high temperature.