Optical breakdown in transparent media with adjustable axial length and location.
Optical breakdown in transparent media with adjustable axial length and location.
复制标题
透明介质中的光学击穿，轴向长度和位置可调。
作者：
I. Toytman;D. Simanovski;D. Palanker
我们展示了一个高度拉长（纵横比超过500：1）的光学击穿在水中产生的一个单一的脉冲的皮秒激光聚焦与轴棱锥和透镜的组合。击穿区的近端和远端的位置可以通过用振幅掩模修改入射光束的径向强度分布来调节。利用菲涅耳衍射理论，我们推导出振幅掩模的透射轮廓，以在击穿区产生均匀的轴向强度分布。实验观察到的动态与设计的面具得到的气泡与理论模型是一致的。一种产生可调圆柱形击穿的系统可用于透明材料的快速线性或平面切割。它可能是有用的眼科手术应用，包括白内障手术和晶体透镜软化。
We demonstrate a highly elongated (aspect ratio over 500:1) optical breakdown in water produced by a single pulse of a picosecond laser focused with a combination of an axicon and a lens. Locations of the proximal and distal ends of the breakdown region can be adjusted by modifying radial intensity distribution of the incident beam with an amplitude mask. Using Fresnel diffraction theory we derive a transmission profile of the amplitude mask to create a uniform axial intensity distribution in the breakdown zone. Experimentally observed dynamics of the bubbles obtained with the designed mask is in agreement with the theoretical model. A system producing an adjustable cylindrical breakdown can be applied to fast linear or planar dissection of transparent materials. It might be useful for ophthalmic surgical applications including cataract surgery and crystalline lens softening.
影响因子：
3.8
作者：
Quinto-Su PA;Venugopalan V;Ohl CD
通讯作者：
Ohl CD
影响因子：
4
作者：
Tsampoula, X.;Garces-Chavez, V.;Dholakia, K.
通讯作者：
Dholakia, K.