Larsen C, Noordegraaf D, Skovgaard P M W, Hansen K P, Mattsson K E, Bang O
DTU Fotonik—Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.
Opt Express. 2011 Aug 1;19(16):14883-91. doi: 10.1364/OE.19.014883.
We demonstrate supercontinuum generation in a PCF pumped by a gain-switched high-power continuous wave (CW) fiber laser. The pulses generated by gain-switching have a peak power of more than 700 W, a duration around 200 ns, and a repetition rate of 200 kHz giving a high average power of almost 30 W. By coupling such a pulse train into a commercial nonlinear photonic crystal fiber, a supercontinuum is generated with a spectrum spanning from 500 to 2250 nm, a total output power of 12 W, and an infrared flatness of 6 dB over a bandwidth of more than 1000 nm with a power density above 5 dBm/nm (3 mW/nm). This is considerably broader than when operating the same system under CW conditions. The presented approach is attractive due to the high power, power scalability, and reduced system complexity compared to picosecond-pumped supercontinuum sources.
我们展示了在由增益开关高功率连续波（CW）光纤激光器泵浦的光子晶体光纤中产生的超连续谱。通过增益开关产生的脉冲具有超过700 W的峰值功率、约200 ns的持续时间和200 kHz的重复频率，平均功率高达近30 W。通过将这样的脉冲序列耦合到商用非线性光子晶体光纤中，产生了一个超连续谱，其光谱范围从500到2250 nm，总输出功率为12 W，在超过1000 nm的带宽上具有6 dB的红外平坦度，功率密度高于5 dBm/nm（3 mW/nm）。这比在连续波条件下运行同一系统时的光谱要宽得多。与皮秒泵浦的超连续谱源相比，所提出的方法具有高功率、功率可扩展性和降低系统复杂性等优点，因此具有吸引力。
