فیبر بلور فوتونی با ساختار دایروی- هشت‌ضلعی با پاشندگی رنگی، تلفات ساختار و اثر غیر خطی پایین
محورهای موضوعی : مهندسی برق و کامپیوترسعید علیائی 1 , محمود صیفوری 2 , علی نیکوصحبت 3
1 - دانشگاه تربیت دبیر شهید رجايي
2 - دانشگاه تربیت دبیر شهید رجايي
3 - دانشگاه تربیت دبیر شهید رجايي
کلید واژه: فیبر بلور فوتونی ناحیه مؤثر مودی پاشندگی رنگی تلفات ساختار اثرات غیر خطی,
چکیده مقاله :
از فیبرهای بلور فوتونی به عنوان موجبر با پاشندگی و تلفات ساختار کم همراه با ضریب غیر خطی اندک، در سامانه‌های مخابرات نوری می‌توان استفاده کرد. در این مقاله، یک فیبر بلور فوتونی با ساختار دایروی- هشت‌ضلعی پیشنهاد شده است. در طرح اولیه، فیبر بلور فوتونی دارای ساختار هشت‌ضلعی است که پاشندگی آن در طول موج 55/1 میکرومتر در حدود ps/nm.km 70 است. تلفات ساختار و ضریب غیر خطی آن به ترتیب برابر dB/cm 12-10 × 6/0 و 1-km1-w 988/8 است. با اصلاح ساختار به صورت ترکیبی، مقدار پاشندگی به مرز صفر رسیده است و نتایج شبیه‌سازی، مقدار تلفات ساختار را معادل dB/cm 11-10 × 8 و ضریب غیر خطی را برابر 1-km1-w 956/7 نشان می‌دهد.
Photonic crystal fibers (PCFs) as waveguides with low dispersion, low confinement loss, and low nonlinearity can be used in optical telecommunication systems. In this paper, a hexagonal-circular photonic crystal fiber is proposed. In the first design, we present a hexagonal PCF with 70 ps/nm.km dispersion at 1550 nm wavelength. The confinement loss and nonlinearity of this structure are respectively obtained as 0.6×10-12dB/cm and 8.988 W-1km-1. In the second design, by improving th e primary structure as hexagonal-circular PCF, the nearly zero dispersion is obtained. The simulation results show that the confinement loss and nonlinearity of the improved structure are 8×10-11 dB/cm and 7.956 W-1km-1, respectively.
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