30859

طراحي و ساخت شبكه مخابرات نوري زيرآب

كارشناسي ارشد

فيزيك- فوتونيك

1400

1402/11/29

فاطمه دباغ كاشاني

ندارم

فيزيك

مخابرات بي‌سيم زيرآب مي‌تواند به وسيله‌ي امواج صوتي، راديويي و نوري انتقال اطلاعات را انجام دهد. مقايسه‌ها حاكي از آن است كه در امواج صوتي و راديويي محدوديت پهناي باند وجود دارد، درصورتي‌كه مخابرات نوري زير آب مي‌تواند مقدار بسيار زياد اطلاعات را با مقدار تاخير بسيار كمي انتقال دهد. با اين حال، شرايط بسترهاي آبي (به‌عنوان مثال جذب، پراكندگي، تلاطم و غيره) چالش‌هاي بزرگي را براي اين نوع مخابرات ايجاد مي‌كنند و به طور قابل توجهي محدوده‌ي ارتباطي قابل دستيابي را كاهش مي‌دهند. براي حل اين مشكلات به شبكه‌هاي كارآمد و راه حل‌هايي در زمينه‌ي قرارگيري وسايل و محلي‌سازي نياز مي‌باشد. هم‌چنين انتخاب قطعات مناسب از جمله، ليزر، ديودنوري و فوتوديود، مي‌تواند عملكرد سامانه را به‌طور قابل‌توجهي افزايش دهد. از ديگر مشكلات موجود، برد كم مخابرات نوري زيردريا مي‌باشد كه مي‌توان با استفاده از طراحي يك شبكه مناسب از اين مشكل جلوگيري كرد. در اين پژوهش با استفاده از مدارات الكترونيكي و استفاده از فرستنده و گيرنده‌هاي اپتيكي، يك سامانه شبكه مخابرات نوري زيردريا طراحي و ساخته شد كه مي‌تواند تا حدودي نيازهاي ارسال اطلاعات متفاوت از قبيل صوت و تصوير را برطرف نمايد. ابتدا براي اين كار شبيه‌سازي صورت گرفته و طراحي مدار صورت گرفته، سپس به صورت عملي مدارات ساخته شده و در محيط آبي (آكواريوم)، مورد بررسي و آزمايش قرار گرفته است.

1403/02/24

Design and construction of underwater optical communication network

2/17/2025 12:00:00 AM

Underwater wireless communication technologies can transmit data by utilizing different types of waves such as sound, radio, and optical. However, audio and radio waves have their bandwidth limitations, which means they cannot transmit as much information as quickly as optical waves can. In contrast, underwater optical communication can transmit a massive amount of data with very low latency. Underwater wireless communication can transmit information using sound, radio and optical waves. Comparisons indicate that there is a bandwidth limitation in audio and radio waves, while underwater optical communication can transmit a very large amount of information with very little delay. However, water bed conditions (e.g. absorption, scattering, turbulence, etc.) pose great challenges for this type of communication and significantly reduce the achievable communication range. To solve these problems, efficient networks and solutions in the field of equipment placement and localization are needed. Also, choosing the right parts, including laser, diode, and photodiode, can significantly increase the performance of the system. Another existing problem is the low range of underwater optical communication, which can be avoided by designing a suitable network. A underwater optical communication network system was designed and built for this research using electronic circuits, optical transmitters, and receivers. The system is capable of transmitting various types of information, including audio and video. The first step was to simulate and design the circuit. Afterward, the circuits were practically built, tested and examined in an aquatic environment (aquarium).In this research, using electronic circuits and the use of optical transmitters and receivers, a submarine optical communication network system was designed and built, which can partially meet the needs of sending different information such as audio and video. First, for this work, simulation was done and the circuit was designed, then the circuits were practically built and examined and tested in the aquatic environment (aquarium).

مخابرات نوري زير دريا , شبكه مخابرات نوري زير دريا , پراكندگي , ليزر

underwater optical communication , underwater optical communication network , scattering , laser

Amir Mohammad Ahmadian

Dr. Fateme Dabbagh Kashani