Observation and verification of the Fresnel and Arago interference laws using adaptive photodetectors

Q4 Social Sciences Revista Mexicana De Fisica E Pub Date : 2021-01-04 DOI:10.31349/revmexfise.18.44

P. Montero

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Abstract

The Fresnel and Arago interference laws relate the polarization of the electromagnetic field to the interference phenomenon. Different methods and interferometers have been reported to verify these laws; most of them rely on visual inspection to determine the positions of maximum and minimum interference. In this report, the observation and verification of the Fresnel and Arago interference laws using adaptive photodetectors are presented. These photodetectors generate an electrical current proportional to the square of the visibility of the interference pattern; thus the gradual change from the appearance of the interference pattern (maximum visibility) to its disappearance (minimum or null visibility) is detected as an electrical current. The extreme values of the interference pattern visibility can be accurately assessed, in real time and without any signal processing using. A difference of 3 orders of magnitude between the signals measured in the positions of maximum and minimum interference is demonstrated. Due to the adaptive properties of the adaptive photodetectors (compensation of the irregularities of the interfering beams and suppression environmental fluctuations), the proposed method can be suitable for teaching purposes in undergraduate laboratories.

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用自适应光电探测器观察和验证菲涅耳和阿拉戈干涉定律

菲涅耳和阿拉戈干涉定律将电磁场的极化与干涉现象联系起来。已经报道了不同的方法和干涉仪来验证这些定律;它们大多依靠目视检查来确定最大和最小干扰的位置。本文介绍了利用自适应光电探测器对菲涅耳和阿拉戈干涉定律的观察和验证。这些光电探测器产生的电流正比于干涉图案的可见度的平方;因此，从干扰图案的出现(最大能见度)到其消失(最低或零能见度)的逐渐变化被检测为电流。干涉模式可见性的极值可以准确地评估，在实时和没有任何信号处理使用。在最大和最小干扰位置测量的信号之间存在3个数量级的差异。由于自适应光电探测器的自适应特性(补偿干扰光束的不规则性和抑制环境波动)，该方法适合于本科实验室的教学目的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Mexicana De Fisica E 社会科学-科学史与科学哲学

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Revista Mexicana de Física (Rev. Mex. Fis.) publishes original papers of interest to our readers from the physical science com unity. Language may be English or Spanish, however, given the nature of our readers, English is recommended. Articles are classified as follows: Research. Articles reporting original results in physical science. Instrumentation. Articles reporting original contributions on design and construction of scientific instruments. They should present new instruments and techniques oriented to physical science problems solutions. They must also report measurements performed with the described instrument. Reviews. Critical surveys of specific physical science topics in which recent published information is analyzed and discussed. They should be accessible to physics graduate students and non specialists, and provide valuable bibliography to the specialist. Comments. Short papers (four pages maximum) that assess critically papers by others authors previously published in the Revista Mexicana de Física. A comment should state clearly to which paper it refers.