Picosecond pulses from wavelength-swept continuous-wave Fourier domain mode-locked lasers
Picosecond pulses from wavelength-swept continuous-wave Fourier domain mode-locked lasers
复制标题
DOI：
10.1038/ncomms2870
复制
发表时间：
2013-05-01
影响因子：
16.6
通讯作者：
Huber, Robert
中科院分区：
文献类型：
--
作者：
Eigenwillig, Christoph M.;Wieser, Wolfgang;Huber, Robert
超快激光器在许多科学领域中具有至关重要的作用;然而，到目前为止，还没有直接来自紧凑，高效和低功率半导体激光器的高能脉冲。因此，我们介绍了一种新的方法的基础上的时间压缩的连续波，波长扫描输出的傅里叶域锁模激光器，其中一个窄带光学滤波器是同步调谐到光的往返时间在一个半导体长的激光腔。到目前为止，这些快速扫描的激光器使光学相干断层扫描的速度增加了几个数量级。在这里，我们报告在390 kHz的重复率产生类似于60-70 ps的脉冲。由于能量以光学方式存储在长光纤延迟线中，而不是作为激光增益介质中的粒子数反转，因此现在可以直接从低功率、紧凑的基于晶闸管的振荡器中产生高能脉冲。我们的理论预测亚皮秒脉冲与这种新技术在未来。
Ultrafast lasers have a crucial function in many fields of science; however, up to now, high-energy pulses directly from compact, efficient and low-power semiconductor lasers are not available. Therefore, we introduce a new approach based on temporal compression of the continuous-wave, wavelength-swept output of Fourier domain mode-locked lasers, where a narrowband optical filter is tuned synchronously to the round-trip time of light in a kilometre-long laser cavity. So far, these rapidly swept lasers enabled orders-of-magnitude speed increase in optical coherence tomography. Here we report on the generation of similar to 60-70 ps pulses at 390 kHz repetition rate. As energy is stored optically in the long-fibre delay line and not as population inversion in the laser-gain medium, high-energy pulses can now be generated directly from a low-power, compact semiconductor-based oscillator. Our theory predicts subpicosecond pulses with this new technique in the future.