{'fraction_non_alphanumeric': 0.023351648351648352, 'fraction_numerical': 0.02197802197802198, 'mean_word_length': 5.024793388429752, '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}}
Fiber Bragg grating strain sensor interrogation with 1.3 μm Fourier domain mode-locked wavelength swept laser

We demonstrate a high speed fiber Bragg grating sensor array interrogation using 1.3 μm Fourier-domain modelocked (FDML) wavelength-swept laser. The slope coefficients for measured relative wavelength difference and relative time delay from the static strain are 1.02 pm/μstrain and 0.16 ns/μstrain, respectively. We demonstrate the dynamic response of the FBG sensor array with 100 Hz modulation strain based on the FDML wavelength swept laser at 25.3 kHz scanning rate. The FBG sensor interrogation system using FDML wavelength swept laser can be realized for the high speed and high sensitivity monitoring systems.