Pekarek Selina, Südmeyer Thomas, Lecomte Steve, Kundermann Stefan, Dudley John M, Keller Ursula
Department of Physics, Institute of Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.
Opt Express. 2011 Aug 15;19(17):16491-7. doi: 10.1364/OE.19.016491.
We present carrier envelope offset (CEO) frequency detection of a diode-pumped Yb:KGW (ytterbium-doped potassium gadolinium tungstate) laser with a repetition rate of 1 GHz. The SESAM-soliton-modelocked laser delivers 2.2-W average power in 290-fs pulses. This corresponds to a peak power of 6.7 kW and the optical-to-optical efficiency is 38%. With a passive pulse compression the duration is reduced to 100 fs at an average power of 1.1 W. Coherent supercontinuum (SC) generation in a highly nonlinear photonic crystal fiber (PCF) is achieved without additional amplification. Furthermore we have demonstrated that pulse compression towards lower soliton orders of approximately 10 was required for coherent SC generation and CEO detection. Additional numerical simulations further confirm these experimental results.
我们展示了对重复频率为1 GHz的二极管泵浦Yb:KGW（掺镱钨酸钆钾）激光器的载波包络偏移（CEO）频率检测。SESAM锁模孤子激光器以290 fs脉冲输出2.2 W平均功率。这对应于6.7 kW的峰值功率，光到光效率为38%。通过被动脉冲压缩，在平均功率为1.1 W时脉冲持续时间缩短至100 fs。在无需额外放大的情况下，在高非线性光子晶体光纤（PCF）中实现了相干超连续谱（SC）产生。此外，我们证明了对于相干SC产生和CEO检测，需要将脉冲压缩到约为10的较低孤子阶数。额外的数值模拟进一步证实了这些实验结果。
