Snapshot active detection of target chemicals using spatial heterodyne spectroscopy

Christopher A. Kendziora; Tyler J. Huffman

doi:10.1117/12.3013824

7 June 2024 Snapshot active detection of target chemicals using spatial heterodyne spectroscopy

Christopher A. Kendziora, Tyler J. Huffman

Proceedings Volume 13026, Next-Generation Spectroscopic Technologies XVI; 130260C (2024) https://doi.org/10.1117/12.3013824
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

We present further development of an eye-safe, invisible, stand-off technique designed for the detection of target chemicals in a single “Snapshot” frame, capable of chemically identifying moving targets. Broadband Fabry-Perot quantum cascade lasers (FP-QCLs) are employed in the LWIR (long-wave infrared) in the range of 8 to 12μm, to interrogate the spectral features from analytes of interest. We have developed a custom-built broadband laser source in the LWIR range. This “white” broadband laser source enables stand-off detection in a single snapshot frame. The transmission signals from target chemicals are spectrally extracted by an LWIR spectrometer based on the spatial heterodyne spectroscopy (SHS) technique. This manuscript will cover the implementation and optimization of an FP-QCL for this broadband spectroscopic application. We discuss the collection and processing of SHS images to extract spectral information. Finally, we present results of measurements to demonstrate the application of the method to spectroscopic identification of chemicals, including on moving targets.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Christopher A. Kendziora and Tyler J. Huffman "Snapshot active detection of target chemicals using spatial heterodyne spectroscopy", Proc. SPIE 13026, Next-Generation Spectroscopic Technologies XVI, 130260C (7 June 2024); https://doi.org/10.1117/12.3013824

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available