GPC light shaper for speckle-free one-and two-photon contiguous pattern excitation
GPC light shaper for speckle-free one-and two-photon contiguous pattern excitation
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DOI：
10.1364/oe.22.005299
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发表时间：
2014-03-10
期刊：
影响因子：
3.8
通讯作者：
Gluckstad, Jesper
中科院分区：
文献类型：
--
作者：
Banas, Andrew;Palima, Darwin;Gluckstad, Jesper
广义相衬（GPC）是一种产生无散斑连续光学分布的有效方法，可用于静态光束整形、光学操纵等多种应用，最近还用于双光子光遗传学中的激发。为了充分利用典型的高斯激光器在这样的应用中，我们解析推导出光子有效的光整形与GPC的条件。当结合在以前的作品中开发的最佳对比度的条件，我们的分析进一步简化了GPC的实施。我们的分析结果被应用到实际的照明形状，如圆形和不同的矩形，通常用于工业或商业应用。我们还展示了面向生物光子学研究和其他当代应用的任意形状的简单而有效的光束整形。优化的GPC配置始终提供类似于84%的效率和类似于3倍的强度增益。与传统的振幅掩蔽相比，能量节省的评估表明，优化的GPC配置节省了近似93%的典型能量损失。(C)2014年美国光学学会
Generalized Phase Contrast (GPC) is an efficient method for generating speckle-free contiguous optical distributions useful in diverse applications such as static beam shaping, optical manipulation and recently, for excitation in two-photon optogenetics. To fully utilize typical Gaussian lasers in such applications, we analytically derive conditions for photon efficient light shaping with GPC. When combined with the conditions for optimal contrast developed in previous works, our analysis further simplifies GPC's implementation. The results of our analysis are applied to practical illumination shapes, such as a circle and different rectangles commonly used in industrial or commercial applications. We also show simple and efficient beam shaping of arbitrary shapes geared towards biophotonics research and other contemporary applications. Optimized GPC configurations consistently give similar to 84% efficiency and similar to 3x intensity gain. Assessment of the energy savings when comparing to conventional amplitude masking show that similar to 93% of typical energy losses are saved with optimized GPC configurations. (C) 2014 Optical Society of America