{'fraction_non_alphanumeric': 0.02283653846153846, 'fraction_numerical': 0.004807692307692308, 'mean_word_length': 4.907801418439717, '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}}
Two-wave coupling of focused laser beam in a Ce:SBN photorefractive crystal

Two-wave coupling of focused argon laser beam with a wavelength of 514.5nm is experimentally studied in a Ce:SBN photorefractive crystal. The images of the input and output signal of the crystal are provided, which indicate that there are two-wave couplign between the interference fringes inside the crystal and the energy can transfer from one bright peak to another along the negative c-axis direction of the crystal. The fringe intesnties at the output face of the crystal are also investigated with respect to the time, the incident beam intensity ratio, and the total intensity of the incident beams. This research demonstrates a bistable state, which is significant to achieve optic-optic controlling device such as one-to-multi optic-optic switch.