Renninger William H, Chong Andy, Wise Frank W
Department of Applied Physics, Cornell University, Ithaca, NY 14853, USA.
Opt Lett. 2008 Dec 15;33(24):3025-7. doi: 10.1364/ol.33.003025.
A new regime of pulse parameters in a normal-dispersion fiber laser is identified. Dissipative solitons exist with remarkably large pulse duration and chirp, along with large pulse energy. A low-repetition-rate oscillator that generates pulses with large and linear chirp can replace the standard oscillator, stretcher, pulse-picker, and preamplifier in a chirped-pulse fiber amplifier. The theoretical properties of such a giant-chirp oscillator are presented. A fiber laser designed to operate in the new regime generates approximately 150 ps pulses at a 3 MHz repetition rate. Amplification of these pulses to 1 microJ energy with pulse duration as short as 670 fs demonstrates the promise of this new approach.
一种正常色散光纤激光器中脉冲参数的新机制被识别出来。耗散孤子以显著大的脉冲持续时间和啁啾存在，同时具有大的脉冲能量。一个能产生具有大且线性啁啾脉冲的低重复率振荡器可以替代啁啾脉冲光纤放大器中的标准振荡器、展宽器、脉冲选择器和前置放大器。文中给出了这种巨啁啾振荡器的理论特性。设计用于在新机制下运行的光纤激光器在3兆赫兹重复率下产生大约150皮秒的脉冲。将这些脉冲放大到1微焦能量且脉冲持续时间短至670飞秒，证明了这种新方法的前景。
