{'fraction_non_alphanumeric': 0.01624815361890694, 'fraction_numerical': 0.011816838995568686, 'mean_word_length': 4.942982456140351, '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}}
Performance Improvement of OCDMA System with Single Photodiode Detection Technique

At present, the OCDMA has gaining so much of popularity due to increase in demand of high speed and huge capacity of handling data traffic. OCDMA network provide high level of data security from one end to another end. Through OCDMA, the number of user can access the data simultaneously without any occurrence of collision. At receiving end there are number of detection scheme that are used to retrieve the original data but due to some data degradation factors the exact amount of data cannot be retrieved at receiving end. Thus to come over these limiting factors i.e. Multiple Access Interference and noise effects in OCDMA system, detection scheme called single Photodiode detection(SPD) technique with 1Gbps of data rate is simulated via Optisystem version 13.0. The effect of attenuation, dispersion both considered into the system. The performance of SPD based OCDMA network is characterised on the basis of BER, Q factor and number of photodiodes used. The simulated model provides better Quality factor and minimum BER which is useful for good communication occurrence. SPD having minimum BER of 1.29597× 10-43 and Quality factor 15 as in comparison to complementary detection technique provides better quality factor and reduces the bit error rate of signal.