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