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Design of new multipass gas cells with circular and elliptical cross-section

Yan, Chunsheng; Wang, Binhao and Somesfalean, Gabriel LU (2014) In Microwave and Optical Technology Letters 56(12). p.3003-3009
Abstract
Two new types of multipass gas cells with circular and elliptical cross-sections were developed. As for a cylindrical cell, the reflected rays in the circle would be an irregular trace without superposition and termination, if its central angle is a bit more than 2 pi/3 for an example. Each two adjacent reflected points have the same optical path difference and optical light passes through different optical distances before different reflection points. As for a cylindroidal cell, if the optical ray passes through one focus point of the ellipse, it must also pass through the other. The light will exit finally from the termination point of an axis. The optical distance depends on the eccentricity of the ellipse and the size of the emergent... (More)
Two new types of multipass gas cells with circular and elliptical cross-sections were developed. As for a cylindrical cell, the reflected rays in the circle would be an irregular trace without superposition and termination, if its central angle is a bit more than 2 pi/3 for an example. Each two adjacent reflected points have the same optical path difference and optical light passes through different optical distances before different reflection points. As for a cylindroidal cell, if the optical ray passes through one focus point of the ellipse, it must also pass through the other. The light will exit finally from the termination point of an axis. The optical distance depends on the eccentricity of the ellipse and the size of the emergent window. In this article, the detailed mathematical derivations of the optical multireflection traces for the two structures are presented. The unified formula is developed. It is found that these designs have small volumes and adjustable long optical paths. For example, the optical distances in the two structures are about 625 mm for a circle with 50 mm radius. The performance of the system can be enhanced by coating high total reflection film, increasing the processing and positioning precisions, and using highly collimating laser beam. (C) 2014 Wiley Periodicals, Inc. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
multipass gas cell, gas sensor, cylindrical gas cell, elliptical, cylinder gas cell
in
Microwave and Optical Technology Letters
volume
56
issue
12
pages
3003 - 3009
publisher
John Wiley & Sons
external identifiers
  • wos:000342826100064
  • scopus:84908374196
ISSN
0895-2477
DOI
10.1002/mop.28753
language
English
LU publication?
yes
id
a08a16a4-f25d-42c9-b0cd-3bbff67d68b9 (old id 4796265)
date added to LUP
2014-11-21 14:55:20
date last changed
2017-01-01 05:21:39
@article{a08a16a4-f25d-42c9-b0cd-3bbff67d68b9,
  abstract     = {Two new types of multipass gas cells with circular and elliptical cross-sections were developed. As for a cylindrical cell, the reflected rays in the circle would be an irregular trace without superposition and termination, if its central angle is a bit more than 2 pi/3 for an example. Each two adjacent reflected points have the same optical path difference and optical light passes through different optical distances before different reflection points. As for a cylindroidal cell, if the optical ray passes through one focus point of the ellipse, it must also pass through the other. The light will exit finally from the termination point of an axis. The optical distance depends on the eccentricity of the ellipse and the size of the emergent window. In this article, the detailed mathematical derivations of the optical multireflection traces for the two structures are presented. The unified formula is developed. It is found that these designs have small volumes and adjustable long optical paths. For example, the optical distances in the two structures are about 625 mm for a circle with 50 mm radius. The performance of the system can be enhanced by coating high total reflection film, increasing the processing and positioning precisions, and using highly collimating laser beam. (C) 2014 Wiley Periodicals, Inc.},
  author       = {Yan, Chunsheng and Wang, Binhao and Somesfalean, Gabriel},
  issn         = {0895-2477},
  keyword      = {multipass gas cell,gas sensor,cylindrical gas cell,elliptical,cylinder gas cell},
  language     = {eng},
  number       = {12},
  pages        = {3003--3009},
  publisher    = {John Wiley & Sons},
  series       = {Microwave and Optical Technology Letters},
  title        = {Design of new multipass gas cells with circular and elliptical cross-section},
  url          = {http://dx.doi.org/10.1002/mop.28753},
  volume       = {56},
  year         = {2014},
}