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ناپایداری مدی در تقویتکننده فیبر ایتربیومی | ||
الکترومغناطیس کاربردی | ||
دوره 8، شماره 2 - شماره پیاپی 21، دی 1399، صفحه 33-43 اصل مقاله (1.16 M) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
امیر سپهوند1؛ مریم کریمی* 2؛ کاظم جمشیدی قلعه1؛ مهدی امنیت طلب امنیت طلب3؛ آذین شوهانی1 | ||
1گروه فیزیک، دانشکده علوم پایه، دانشگاه شهید مدنی آذربایجان | ||
2استادیار، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی، تهران، ایران، صندق پستی 14155-1339 | ||
33گروه فیزیک، دانشکده علوم پایه، دانشگاه ارومیه | ||
تاریخ دریافت: 08 بهمن 1398، تاریخ بازنگری: 21 اردیبهشت 1399، تاریخ پذیرش: 23 خرداد 1399 | ||
چکیده | ||
عوامل متعددی از قبیل اثرات غیرخطی و ناپایداری مدی در خروجی تقویتکنندهها و لیزرها فیبری پرتوان تأثیرگذار است. ازآنجاکه این افزارهها کاربردهای بسیاری در صنعت و پزشکی و ادوات نظامی دارند، ازاینرو مطالعه بر روی عوامل مختلف تأثیرگذار در خروجی آنها مستقیماً در طراحی تقویتکنندهها و لیزرهای فیبری پرتوان انعکاس مییابد. در این مقاله ناپایداری مدی که بزرگترین عامل محدودکننده خروجی لیزرها و تقویتکنندههای فیبری پرتوان است مورد مطالعه، شبیهسازی و بررسی قرار گرفته است. در این افزارههای توان بالا، به دلایل وجود نقص کوانتومی، تلفات و پراکندگی نور، دمای محیط افزایش مییابد این امر باعث میشود ضریب شکست محیط تغییر کند. تغییرات ضریب شکست عامل اصلی ناپایداری مدی در تقویتکنندهها و لیزرهای توان بالای فیبری است، در ناپایداری مدی، مد پایه با اولین مد مرتبه بالاتر تداخل کرده که موجب کاهش انرژی مد پایه میشود. در این مقاله تأثیر عوامل مختلف بر آستانه ناپایداریهای مدی و انتقال توان از مد پایه به اولین مد مرتبه بالاتر مورد بررسی قرار گرفته است. | ||
کلیدواژهها | ||
ناپایداری مدی؛ چگالی آلایندهها؛ تغییرات ضریب شکست؛ تقویتکننده فیبر ایتربیومی | ||
عنوان مقاله [English] | ||
Mode Instability in the Ytterbium Doped Fiber Amplifier | ||
نویسندگان [English] | ||
Amir Sepahvand1؛ maryam karimi2؛ Kazem Jamshidi Ghaleh Jamshidi Ghaleh1؛ Mahdi Amniat-Talab Amniat-Talab3؛ Azin Shohani1 | ||
1Department of Physics, Azarbaijan Shahid Madani University, West Azarbaijan, Tabriz, Iran | ||
2Faculty of Plasma Research School, Nuclear Science and Technology Research Institute, Tehran, Iran, P.O. Box 14155-1339 | ||
3Department of Physics, Urmia University, 11km SERO Road, Urmia, Iran | ||
چکیده [English] | ||
Different factors such as nonlinear phenomena and mode instability affect the output of the high-power fiber lasers and amplifiers. Since these devices have many applications in the industry, medicine, and military facilities, the study of the various factors’ effects on their output is directly reflected on the design of high-power lasers and amplifiers. In the present paper, the mode instability which is the major limiting factor on the output of high power lasers and amplifiers has been studied, simulated, and investigated. In these high-power devices, the temperature increases due to quantum defects, background loss, and light scattering, which change the refractive index of the fiber material. Variation of the refractive index is the main reason of mode instability in high power fiber lasers and amplifiers. Mode instability causes the coupling of the fundamental mode to the upper-mode and thus decreases the fundamental mode’s energy. In this paper, different factors that affect the threshold of the mode instability and power transfer from the fundamental mode to the upper mode have been investigated. | ||
کلیدواژهها [English] | ||
Mode instability, Dopant concentration, Refractive index change, Ytterbium doped fiber amplifier | ||
مراجع | ||
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