2 μm semiconductor disk laser with a heterodyne linewidth below 10 kHz.
2 μm semiconductor disk laser with a heterodyne linewidth below 10 kHz.
复制标题
外差线宽低于 10 kHz 的 2 μm 半导体盘激光器。
作者：
B. Rösener;S. Kaspar;M. Rattunde;Tino Töpper;C. Manz;K. Köhler;O. Ambacher;J. Wagner
我们演示了一种2 μm半导体圆盘激光器，其线宽在<10 kHz范围内，以单纵向模式发射。采用外差检测方案对线宽进行精确测量。在这些实验中，两个相同的激光腔的输出光束叠加在一起，以便在光电二极管上产生节拍信号。在没有主动频率稳定的情况下，在输出功率为100 mW时测量了45 kHz的线宽。当使用以Fabry-Perot干涉仪作为波长参考的反馈回路组成的频率稳定器时，线宽可以进一步减小到9 kHz。
We demonstrate a 2 μm semiconductor disk laser emitting in a single longitudinal mode with a linewidth in the <10 kHz range. A heterodyne detection scheme was used for precise linewidth measurements. In these experiments, the output beams of two identical laser cavities were superposed in order to generate a beat note signal on a photodiode. In the absence of active frequency stabilization, a linewidth of 45 kHz was measured at an output power of 100 mW. When using a frequency stabilization consisting of a feedback loop with a Fabry-Perot interferometer as wavelength reference, the linewidth could be further reduced to 9 kHz.