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Implementation of the toroidal absorption cell with multi-layer patterns by a single ring surface

Abstract : We developed a type of toroidal multi-pass cell with multi-layer patterns based on the off-axis model. The effective path length of the original toroidal multi-pass cell is extended several roundtrips in comparison with the single-layer pattern, since the inner surface of the toroidal multi-pass cell is more efficiently utilized. The light pattern has been achieved by using the simple ring surface, which is easy to fabricate. The exact analytical equations for the design of the toroidal multi-pass cell were derived based on analytical vector calculations. A series of numerical ray tracing simulations is presented, and the maximum theoretical optical path length that can be reached is 30 m with a setup of 5 cm column radius. Furthermore, two practical spot patterns are demonstrated with a path length of 8.3 m for a two-layer pattern and 10 m for a three-layer pattern, with respective effective volumes of 63 mL and 94 mL. Furthermore, the fringe effect is substantially reduced to less than 0.5% by the usage of our designed mask.
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https://hal.univ-lille.fr/hal-03019219
Contributeur : Lilloa Université de Lille <>
Soumis le : lundi 23 novembre 2020 - 11:52:12
Dernière modification le : mardi 24 novembre 2020 - 03:21:02

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Hong Chang, Shiling Feng, Xuanbing Qiu, Huiyan Meng, Guqing Guo, et al.. Implementation of the toroidal absorption cell with multi-layer patterns by a single ring surface. Optics Letters, Optical Society of America - OSA Publishing, 2020, Optics Letters, 45 (21), ⟨10.1364/ol.404198⟩. ⟨hal-03019219⟩

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