{'fraction_non_alphanumeric': 0.03707414829659319, 'fraction_numerical': 0.022044088176352707, 'mean_word_length': 5.091463414634147, '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}}
Demonstration of Optical FEC Coding Scheme With Convolutional Code Consisting of a Signal Source

In this letter, we experimentally demonstrated an all-optical forward error correction (FEC) coding scheme with the (7, 5)8 convolutional code using a single signal source to compensate time-dependent noise. The proposed coding scheme was comprised of optical XOR gates, delay lines, and optical wavelength converters, which are based on four-wave mixing in highly non-linear fibers. The temporal waveforms of the optical FEC coding scheme were experimentally achieved for 10 Gb/s return-to-zero differential phase shift keying (RZ-DPSK) signals modulated with 223-1, and the obtained idler signals accurately corresponded to the (7,5)8 code between any input signals. Under the optimized conditions of operational wavelengths, the proposed scheme theoretically offered 4.0 and 3.5 dB net coding gains for the conditions of BER ≥ 10-8 and BER = 10-9, respectively, owing to its small power penalties.