{'fraction_non_alphanumeric': 0.026465028355387523, 'fraction_numerical': 0.015122873345935728, 'mean_word_length': 5.235294117647059, '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}}
Novel design of widely tunable Ytterbium doped double-clad fiber laser by using polarization effects

A novel design of widely tunable Ytterbium-doped double-clad fiber laser is realized in this paper. The tunable wavelength output can be achieved by using a polarizer and polarization controller into the Frabry-Perot Ytterbium doped double-clad fiber laser. Wide wavelength tunability (1054-1080nm) is achieved either by rotating the polarizer or by varying the fiber birefringence with an in-line polarization controller (PC).