Li Yi-Hsun, Lee Yin-Wen, Huang Sheng-Lung
Opt Express. 2023 Sep 25;31(20):32772-32782. doi: 10.1364/OE.497798.
We present a broadband wavelength-swept laser using a 16-µm-core-diameter Cr:YAG crystal fiber as the gain medium. The laser-diode-pumped crystal fiber laser has a threshold of only 102 mW due to the low propagation loss and high heat dissipation efficiency. The laser achieves a sweeping wavelength range of 134 nm, centered around 1425 nm, with a scanning speed of 163 k nm/s. Notably, the cross-polarization-coupled excited state absorption of the signal wavelength constrained the long-wavelength lasing limit. This laser has the potential for swept source optical coherence tomography applications, providing an axial resolution of 11.4 µm.
我们展示了一种宽带扫频激光器，它使用芯径为16μm的Cr:YAG晶体光纤作为增益介质。由于低传播损耗和高散热效率，该激光二极管泵浦晶体光纤激光器的阈值仅为102 mW。该激光器实现了134 nm的扫频波长范围，中心波长约为1425 nm，扫描速度为163 k nm/s。值得注意的是，信号波长的交叉偏振耦合激发态吸收限制了长波长激光极限。这种激光器具有用于扫频源光学相干断层扫描应用的潜力，可提供11.4 μm的轴向分辨率。
