Lin Yu-Chan, Yang Teng-I, Huang Sheng-Lung
Opt Lett. 2022 Jun 1;47(11):2778-2781. doi: 10.1364/OL.459072.
An ultra-broadband wavelength-swept laser (WSL) was generated using glass-clad Ti:sapphire crystal fiber as the gain media. Due to the low signal propagation loss of the crystal fiber, the swept laser has a tuning bandwidth of 250 nm (i.e., 683 nm to 933 nm) at a repetition rate of 1200 Hz. The steady-state and pulsed dynamics of the WSL were analyzed. The 0.018-nm instantaneous linewidth corresponds to a 3-dB coherence roll-off of 7 mm. When using the laser for swept-source optical coherence tomography, an estimated axial resolution of 1.8 µm can be achieved.
采用包层玻璃的钛宝石晶体光纤作为增益介质产生了一种超宽带扫频激光器（WSL）。由于晶体光纤的信号传播损耗较低，该扫频激光器在重复频率为1200Hz时具有250nm（即683nm至933nm）的调谐带宽。分析了WSL的稳态和脉冲动力学。0.018nm的瞬时线宽对应于7mm的3dB相干滚降。当使用该激光器进行扫频光学相干断层扫描时，估计可实现1.8μm的轴向分辨率。
