光纤干涉仪中的相干性和信息量
Coherence and information in a fiber interferometer
摘要：
我们提出了一个基于光纤马赫-曾德尔干涉仪的实验。目的是使学生熟悉光纤光学和干涉测量，并提高他们对光放大的理解。该实验室项目有两个部分：在第一部分中，学生调制干涉仪的光路，通过傅里叶变换光谱学研究光源的光谱。在第二部分中，光学放大器被放置在干涉仪的一个或两个臂中。该装置使用传播1.5 $μ$ m波长的光的单模保偏光纤。在这篇文章中，我们描述了设置和测量的分析，我们从学生报告中提出的结果。所有组件都是标准光学目录的一部分。即使实验是基于光纤光学，它是强大的操纵（但它是相对昂贵的$\sim £15\,000$）：我们描述了我们的努力，以保护组件免受损坏。该实验现在作为为期2周的项目为三年级物理学生提供。该实验同样可能在早期研究生水平的实验室课程中具有价值。
英文摘要：
We present an experiment based on a fibered Mach-Zehnder interferometer. The aim is to familiarize students with fibered optics and interferometry, and to improve their understanding of optical amplification. The laboratory project has two parts: in a first part, the students modulate the optical path of the interferometer to study the spectra of light sources via Fourier Transform Spectroscopy. In a second part, an optical amplifier is placed in one or both arms of the interferometer. The set-up uses monomode, polarization-maintaining fibers that propagate light of 1.5 $μ$m wavelength. In this article, we describe the set-up and the analysis of the measurements, and we present results from student reports. All components are part of standard optical catalogues. Even though the experiment is based on fibered optics, it is robust to manipulation (it is however relatively expensive $\sim £15\,000$): We describe our efforts to protect the components from damage. This experiment is now offered as a 2-week project for third-year Physics students. The experiment may likewise be of value in early graduate level laboratory courses.
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