Division of Advanced Science and Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Opt Lett. 2010 Nov 1;35(21):3631-3. doi: 10.1364/OL.35.003631.
We demonstrate quasi-supercontinuum (quasi-SC) generation around the 1.3 μm wavelength region using ultrahigh-speed, wavelength-tunable, femtosecond soliton pulses based on an ultrashort-pulse laser system operating at a wavelength of 1.0 μm. The wavelength tuning range was from 1.0 to 1.9 μm, and the scanning speed was up to 1.3 MHz. A Gaussian-like quasi-SC with a bandwidth of 220 nm was generated at 1220 nm. The generated quasi-SC was used in an optical-coherence tomography system. High axial resolutions of 5.1 μm in air and 3.7 μm in tissue were obtained. A maximum sensitivity of 100 dB was achieved, and ultrahigh-resolution images of a hamster cheek pouch were observed.
我们使用基于工作波长为 1.0 μm 的超短脉冲激光系统的超快、波长可调谐飞秒孤子脉冲，在 1.3 μm 波长区域演示了准超连续谱（quasi-SC）的产生。波长调谐范围从 1.0 μm 到 1.9 μm，扫描速度高达 1.3 MHz。在 1220 nm 处产生了带宽为 220nm 的高斯型准连续谱。所产生的准连续谱被用于光学相干断层扫描系统。在空气中获得了 5.1 μm 的高轴向分辨率，在组织中获得了 3.7 μm 的高轴向分辨率。实现了 100 dB 的最大灵敏度，并观察到了仓鼠颊囊的超高分辨率图像。
