期刊名称：International Journal of Early Childhood Special Education
电子版ISSN：1308-5581
出版年度：2022
卷号：14
期号：5
页码：354-364
DOI：10.9756/INTJECSE/V14I5.35
语种：English
出版社：International Journal of Early Childhood Special Education
摘要：Oceans are one of the most challenging environments on the earth, it is not only a home for nearly a million species but also the home for many military submarines and deep-water Research vehicles. The oceans have been classified into 5 different zones namely the sunlight zone, the twilight zone, the Midnight Zone, the Abyssal Zone and the Hadalpelagic Zone. The proposed project focuses on the Indian ocean’s twilight zone by transmitting International Morse code through On-Off Keying (OOK) using a 650nm semiconductor laser that is operated in pulse mode to transmit pulses. Since the longer wavelengths are absent in the deep waters, the information transmitted is visibly invisible. A photo-transistor-based receiver estimates the values by measuring the time interval between the pulses which is then processed by the microcontroller and the error correction is done using the Huffman algorithm. Finally, the predicted data is displayed as the output, thus we use a simplex data communication system to demonstrate underwater wireless optical transmission.
