Hara Yusaku, Fujita Shogo, Shioya Yuta, Kannari Fumihiko
Appl Opt. 2020 Jun 10;59(17):5098-5101. doi: 10.1364/AO.395801.
We demonstrated the regenerative amplification of picosecond laser pulses generated by a gain-switched laser diode at 640 nm with a Pr:YLF crystal that was continuously pumped by a multimode blue laser diode. A 0.7-pJ seed pulse energy sufficiently suppressed the self-oscillation in the amplifier. The amplified pulse energy reached 33 µJ at a repetition rate of 10 kHz. The spatial beam quality was nearly . We also demonstrated second- and third-harmonic generation and obtained 320- and 213-nm pulse energies of 18 and 0.83 µJ at 10 kHz.
我们展示了由增益开关激光二极管在640纳米处产生的皮秒激光脉冲通过掺镨钇锂氟晶体进行再生放大，该晶体由多模蓝光激光二极管连续泵浦。0.7皮焦的种子脉冲能量充分抑制了放大器中的自振荡。在10千赫兹的重复频率下，放大后的脉冲能量达到33微焦。空间光束质量接近。我们还展示了二次谐波和三次谐波产生，并在10千赫兹下获得了320纳米和213纳米的脉冲能量，分别为18微焦和0.83微焦。
