论文标题
像素超分辨率干扰模式通过激光频率计量学的混叠效果传感
Pixel super-resolution interference pattern sensing via the aliasing effect for laser frequency metrology
论文作者
论文摘要
具有较大相互角度的几个光学梁的叠加导致次级微米的周期性模式具有复杂的强度，相位和极化结构。对于其高分辨率成像，人们经常采用光学超分辨率方法，例如扫描纳米粒子成像。在这里，我们报告说，通过使用常规的阵列图像传感器与2D傅立叶分析结合使用，可以在简单且紧凑的设置中解析光场的周期性，其分辨率远远超出了像素大小的Nyquist限制限制。我们证明了以〜3/$μ$ m的空间频率解决周期性的能力，比0.188/$μ$ m的像素采样频率高15倍。通过分析第一个布里群区域中的高质量傅立叶别名，这是可能的。为了获得干扰模式的绝对空间频率，我们表明图像传感器的简单旋转足够，这可以调节有效的像素大小并允许确定原始的Brillouin区域。基于这种方法，我们通过无需任何特殊设备的解决力就可以证明波长传感超过100,000
The superposition of several optical beams with large mutual angles results in sub-micrometer periodic patterns with a complex intensity, phase and polarization structure. For high-resolution imaging thereof, one often employs optical super-resolution methods such as scanning nano-particle imaging. Here, we report that by using a conventional arrayed image sensor in combination with 2D Fourier analysis, the periodicities of light fields much smaller than the pixel size can be resolved in a simple and compact setup, with a resolution far beyond the Nyquist limit set by the pixel size. We demonstrate the ability to resolve periodicities with spatial frequencies of ~3/$μ$m, 15 times higher than the pixel sampling frequency of 0.188/$μ$m. This is possible by analyzing high-quality Fourier aliases in the first Brillouin zone. In order to obtain the absolute spatial frequencies of the interference patterns, we show that simple rotation of the image sensor is sufficient, which modulates the effective pixel size and allows determination of the original Brillouin zone. Based on this method, we demonstrate wavelength sensing with a resolving power beyond 100,000 without any special equipment
