激光二极管相干长度以外激光仪器的发展研究

Devipriya G P, G. V., S. K. Nair
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引用次数: 0

摘要

一种超过激光二极管相干长度的不等臂干涉仪引起了激光仪器的发展,本文从理论和实验两方面对其进行了研究。利用波长650 nm、相干长度短的低成本二极管激光器,构造了一种改进的迈克尔逊干涉仪,用于远距离测量各种物理参数。相干长度不是一个突兀的距离。超过相干长度后,条纹对比度逐渐降低,变得难以区分。采用更好的检测技术,可以更大程度地提高条纹的可见性。本文进一步探讨了激光在相干长度以外的其他应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the Development of Laser Instrumentation Beyond the Coherence Length of Laser Diode
An unequal arm interferometer beyond the coherence length of laser diode led to the development of laser instrumentation which is studied theoretically and experimentally in this paper. By using a low-cost diode laser having 650 nm wavelength and short coherence length, a modified Michelson’s interferometer is constructed for the measurements of various physical parameters for long distance measurements. The coherence length is not an abrupt distance. Beyond the coherence length the fringe contrast reduces gradually and becomes indistinguishable. Using better detection techniques, the fringe visibility can be improved to a greater extend. This paper further investigates the other applications of lasers beyond the coherence length.
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