{'fraction_non_alphanumeric': 0.018018018018018018, 'fraction_numerical': 0.0, 'mean_word_length': 5.541176470588235, '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}}
Spectral Characteristics of Linewidth Enhancement Factor α of Multidimensional Quantum Wells

We calculated spectral characteristics of the linewidth enhancement factor α for multidimensional quantum-well lasers. By increasing the quantization dimension, the wavelength dependence of α becomes stronger and its value around the maximum gain becomes smaller. For a quantum box, α is almost zero at the gain peak, and becomes negative at a shorter wavelength. The negative α yields the possibility of long-distance high-capacity optical fiber communication.