Very long optical path-length from a compact multi-pass cell
Optics
2015-05-19 v2 Instrumentation and Detectors
Abstract
The multiple-pass optical cell is an important tool for laser absorption spectroscopy and its many applications. For most practical applications, such as trace-gas detection, a compact and robust design is essential. Here we report an investigation into a multi-pass cell design based on a pair of cylindrical mirrors, with a particular focus on achieving very long optical paths. We demonstrate a path-length of 50.31 m in a cell with 40 mm diameter mirrors spaced 88.9 mm apart - a 3-fold increase over the previously reported longest path-length obtained with this type of cell configuration. We characterize the mechanical stability of the cell and describe the practical conditions necessary to achieve very long path-lengths.
Keywords
Cite
@article{arxiv.1007.4613,
title = {Very long optical path-length from a compact multi-pass cell},
author = {Dipankar Das and Andrew C. Wilson},
journal= {arXiv preprint arXiv:1007.4613},
year = {2015}
}