تقرير
Gain dynamics of a free-space nitrogen laser pumped by circularly polarized femtosecond laser pulses
| العنوان: | Gain dynamics of a free-space nitrogen laser pumped by circularly polarized femtosecond laser pulses |
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| المؤلفون: | Yao, Jinping, Xie, Hongqiang, Zeng, Bin, Chu, Wei, Li, Guihua, Ni, Jielei, Zhang, Haisu, Jing, Chenrui, Zhang, Chaojin, Xu, Huailiang, Cheng, Ya, Xu, Zhizhan |
| سنة النشر: | 2014 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics |
| الوصف: | We experimentally demonstrate ultrafast dynamic of generation of a strong 337-nm nitrogen laser by injecting an external seed pulse into a femtosecond laser filament pumped by a circularly polarized laser pulse. In the pump-probe scheme, it is revealed that the population inversion between the excited and ground states of N2 for the free-space 337-nm laser is firstly built up on the timescale of several picoseconds, followed by a relatively slow decay on the timescale of tens of picoseconds, depending on the nitrogen gas pressure. By measuring the intensities of 337-nm signal from nitrogen gas mixed with different concentrations of oxygen gas, it is also found that oxygen molecules have a significant quenching effect on the nitrogen laser signal. Our experimental observations agree with the picture of electron-impact excitation. Comment: 9 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1364/OE.22.019005 |
| URL الوصول: | http://arxiv.org/abs/1405.6528 |
| رقم الأكسشن: | edsarx.1405.6528 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1364/OE.22.019005 |
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