کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1541091 | 996674 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polarization properties of fibre Bragg gratings inscribed by high-intensity femtosecond 264Â nm pulses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
We have investigated the polarization properties of Bragg gratings fabricated in hydrogen-free photosensitive Ge/B codoped PS1250/1500 and hydrogenated telecom SMF-28 fibres by high-intensity femtosecond UV pulses. We have shown that, under given experimental conditions, the Bragg grating inscription proceeds in these fibres differently, via single-photon (PS1250/1500) or two-photon (SMF-28) absorption mechanisms. In relation to that, in the first fibre both the polarization-dependent loss (PDL) and the differential group delay (DGD) grow linearly with the irradiation fluence, in the second one the PDL and DGD values show a linear dependence only up to fluence value of about 0.7Â kJ/cm2 and then increase drastically. We found that PDL and DGD values for Bragg gratings recorded by high-intensity 264Â nm pulses overcome significantly (by 2-4 and 4-10 times, respectively) the corresponding values obtained in the same fibres under low-intensity CW 244Â nm irradiation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 271, Issue 2, 15 March 2007, Pages 303-308
Journal: Optics Communications - Volume 271, Issue 2, 15 March 2007, Pages 303-308
نویسندگان
C. Caucheteur, P. Mégret, T. Ernst, D.N. Nikogosyan,