{'fraction_non_alphanumeric': 0.036775106082036775, 'fraction_numerical': 0.02263083451202263, 'mean_word_length': 4.80327868852459, '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}}
Tunable Ultraviolet Short-Pulse Generation from a Ce:LiCAF Laser Amplifier System and Its Sum-Frequency Mixing with an Nd:YAG Laser

We developed an all-solid-state tunable short-pulse ultraviolet master oscillator and power amplifier (MOPA) system employing Ce3+:LiCaAlF6 (Ce:LiCAF) which can be pumped by the fourth harmonic of a Q-switched Nd:YAG laser. The demonstrated tuning range was 281 nm to 314 nm with the maximum output energy of 1 mJ from the oscillator maintaining short pulse characteristics. The maximum amplified pulse energy was 4 mJ after the double-pass amplifier. The tuning from 223 nm to 232 nm was realized by the sum-frequency-mixing of the Ce:LiCAF laser and the Q-sw Nd:YAG laser.