Dynamic demonstration of diffractive optic analog-to-digital converter scheme.
Dynamic demonstration of diffractive optic analog-to-digital converter scheme.
复制标题
衍射光学模数转换器方案的动态演示。
DOI：
10.1364/ao.42.000264
复制
发表时间：
2003
期刊：
影响因子：
1.9
通讯作者：
S. Hård
中科院分区：
文献类型：
--
作者：
S. Galt;A. Magnusson;S. Hård
研究了一种基于衍射光学元件的模数转换器（ADC）的动态特性，结果与预测一致。模拟信号通过声光（AO）单元转换为激光束的角偏转。这个实验演示的比特数是3，使用一个8元素的DOE阵列。最大采样率为2.5 MS/s，限制因素是声波在AO单元中穿过激光束宽度的传递时间。该研究旨在作为先前在准静态版本中演示的拟议ADC方案的第一个动态演示。ADC方案的全部潜力将需要使用快速可调谐二极管激光器来取代这里使用的AO偏转方案。
Dynamic behavior of an analog-to-digital converter (ADC) based on diffractive optical element(s) (DOE)(s) was studied and found to be in agreement with predictions. The analog signal was translated to an angular deflection of a laser beam by means of an acousto-optic (AO) cell. The number of bits in this experimental demonstration was three, using an eight-element DOE array. The maximum sample rate was found to be 2.5 MS/s, the limiting factor being the transit time for the acoustic wave across the width of the laser beam in the AO cell. The study is intended as a first dynamic demonstration of a proposed ADC scheme previously demonstrated in a quasi-static version. The full potential of the ADC scheme will require the use of a fast tunable diode laser to replace the AO deflection scheme used here.