عنوان المقالة: A method for controlling the bandwidth of high-energy, few optical-cycle laser pulses tunable from the visible to the nearinfrared
ا.د. وليد توفيق يونس | Prof. Walid Tawfik | 6213
نوع النشر
مجلة علمية
المؤلفون بالعربي
المؤلفون بالإنجليزي
Walid Tawfik
الملخص الانجليزي
In this work we report a new method for controlling the bandwidth of few-cycle optical pulses, using another femtosecond laser pulses chirped in a neonfilled hollow-core fibre. The observed bandwidth varies from 25 to 234 nm in the optical wavelength region 600–950 nm. The pulse energy has for the first time reached a sub-millijoule frontier at 1 kHz. The input pulses are positively chirped using a chirped-pulse amplifier to acquire the widths 32–56 fs at the entrance of the hollow fibre. Then the pulses are highly dispersed due to a self-phase modulation in a nonlinear medium (a neon gas) followed by a pair of chirped mirrors that compensate the dispersion. We have found that this scheme allows for direct tuning of the output-pulse bandwidth while varying the chirping of the input pulses under different neon-gas pressures. Our results can give an opportunity for controlling the interactions in strong electric fields on the ultrafast time scales and are crucial for regenerating attosecond X-ray pulses.
تاريخ النشر
05/05/2015
الناشر
Ukrainian Journal of Physical Optics
رقم المجلد
رقم العدد
رابط الملف
تحميل (55 مرات التحميل)
الكلمات المفتاحية
Few-cycle lasers Self-phase Modulation Tunable femtosecond lasers Ultrafast lasers
رجوع