Sheikh Mumtaz, Riza Nabeel A
Photonic Information Processing Systems Laboratory, CREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816-2700, USA.
Appl Opt. 2010 Jun 1;49(16):D6-11. doi: 10.1364/AO.49.0000D6.
To the best of our knowledge, we propose the first motion-free laser beam propagation analyzer with a hybrid design using a digital micromirror device (DMD) and a liquid electronically controlled variable focus lens (ECVFL). Unlike prior analyzers that require profiling the beam at multiple locations along the light propagation axis, the proposed analyzer profiles the beam at the same plane for multiple values of the ECVFL focal length, thus eliminating beam profiler assembly motion. In addition to measuring standard Gaussian beam parameters, the analyzer can also be used to measure the M(2) beam propagation parameter of a multimode beam. Proof-of-concept beam parameter measurements with the proposed analyzer are successfully conducted for a 633 nm laser beam. Given the all-digital nature of the DMD-based profiling and all-analog motion-free nature of the ECVFL beam focus control, the proposed analyzer versus prior art promises better repeatability, speed, and reliability.
据我们所知，我们提出了首款采用数字微镜器件（DMD）和液体电控可变焦距透镜（ECVFL）的混合设计的无运动激光束传播分析仪。与之前需要沿光传播轴在多个位置对光束进行轮廓分析的分析仪不同，所提出的分析仪在ECVFL焦距的多个值下于同一平面内对光束进行轮廓分析，从而消除了光束轮廓仪组件的运动。除了测量标准高斯光束参数外，该分析仪还可用于测量多模光束的M(2)光束传播参数。使用所提出的分析仪对633 nm激光束成功进行了概念验证光束参数测量。鉴于基于DMD的轮廓分析的全数字特性以及ECVFL光束聚焦控制的全模拟无运动特性，所提出的分析仪与现有技术相比具有更好的重复性、速度和可靠性。
