{'fraction_non_alphanumeric': 0.023076923076923078, 'fraction_numerical': 0.0015384615384615385, 'mean_word_length': 5.2, '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}}
Optical phase locked loop (OPLL) module for use as a 9 GHz source in phased array communications antennas

Coherent optical beamforming is particularly advantageous in multi-beam mobile phased array communications. Systems of this type employ a pair of phase locked optical carriers with a difference frequency equal to the required microwave signal. In this work a packaged diode-laser optical phase locked loop (OPLL) sub-system has been constructed for evaluation in a proof-of-concept optical beamforming system. The loop has been implemented with laser diodes, micro-optics and wide bandwidth electronics to give optimum phase noise performance.