{'fraction_non_alphanumeric': 0.015625, 'fraction_numerical': 0.0, 'mean_word_length': 5.778846153846154, '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}}
Displacement damage characterization of laser diodes

Displacement damage effects in laser diodes are discussed. Differences in the annealing properties of proton and neutron damage were observed which are attributed to the different microscopic structure of tbe damaged regions from the two types of particles. The annealing properties affect testing and characterization methods, and limit the ability to normalize damage in different environments using non-ionizing energy loss (NEL). Key parameters for laser degradation include threshold current, slope efficiency, and the current dependence of optical power output near threshold where the laser shifts from light-emitting diode to laser operation.