فیبر بلور فوتونی با ساختار دایروی- هشت‌ضلعی با پاشندگی رنگی، تلفات ساختار و اثر غیر خطی پایین
الموضوعات :سعید 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
الکلمات المفتاحية: فیبر بلور فوتونی ناحیه مؤثر مودی پاشندگی رنگی تلفات ساختار اثرات غیر خطی,
ملخص المقالة :
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.
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