Generation of broadband multicolor femtosecond laser pulses by using cascading four-wave mixing in a CaF2 plate

作者：Liu Qi-Fu; Li Fang-Jia; Liu Jun^*

来源：Acta Physica Sinica, 2014, 63(9): 094209.

DOI：10.7498/aps.63.094209

• multicolor femtosecond laser
• cascading four-wave mixing
• Fourier transform limit pulse width

Femtosecond laser pulses with new properties have been required for the great progress of femtosecond laser spectroscopy experiments. For example, simultaneous multiple ultrashort femtosecond laser pulses with different frequencies are needed in multicolor pump-probe experiments. Here, we have designed a much more simple and compact system for multicolor femtosecond pulse generation by using cascaded four-wave mixing in a 0.5 mm thick CaF2 plate. Multicolor femtosecond pulses with a sub-10 fs Fourier transform limit pulse width have been obtained by using two oppositely chirped incident pulses. These ultrashort multicolor femtosecond pulses will be used as a new laser source in femtosecond laser spectroscopy.

• 出版日期2014-5
• 单位中国科学院; 强场激光物理国家重点实验室; 中国科学院上海光学精密机械研究所; 同济大学