Skip to main content

Heterodyne interferometric signal retrieval in photoacoustic spectroscopy.

Author(s): Krzempek, Karol; Dudzik, Grzegorz; Abramski, Krzysztof; Wysocki, Gerard; Jaworski, Piotr; et al

To refer to this page use:
Abstract: A new heterodyne interferometric method for optical signal detection in photoacoustic or photothermal spectroscopy is demonstrated and characterized. It relies on using one laser beam for the photoacoustic excitation of the gas sample that creates refractive index changes along the beam path, while another laser beam is used to measure these changes. A heterodyne-based detection of path-length changes is presented that does not require the interferometer to be balanced or stabilized, which significantly simplifies the optical design. We discuss advantages of this new approach to photoacoustic signal detection and the new sensing arrangements that it enables. An open-path photoacoustic spectroscopy of carbon dioxide at 2003 nm and a novel sensing configuration that enables three-dimensional spatial gas distribution measurement are experimentally demonstrated.
Publication Date: Jan-2018
Citation: Krzempek, Karol, Dudzik, Grzegorz, Abramski, Krzysztof, Wysocki, Gerard, Jaworski, Piotr, Nikodem, Michał. (2018). Heterodyne interferometric signal retrieval in photoacoustic spectroscopy.. Optics express, 26 (2), 1125 - 1132. doi:10.1364/oe.26.001125
DOI: doi:10.1364/oe.26.001125
ISSN: 1094-4087
EISSN: 1094-4087
Pages: 1125 - 1132
Language: eng
Type of Material: Journal Article
Journal/Proceeding Title: Optics express
Version: Author's manuscript

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.