Supercontinuum based mid-infrared OCT, spectroscopy, and hyperspectral imaging

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Abstract

Mid-infrared (MIR) spatially coherent supercontinuum (SC) fiber lasers with high brightness and average power find important applications in spectroscopy-based trace gas detection, such as in pollution and food-quality monitoring. Early commercial MIR SC lasers have been limited to about 4.5m, mainly by the transmission bandwidth of the fluoride fibers typically used for the SC generation. Research-based MIR SC lasers have reached 15m, but with very low power and/or bulky and expensive pump lasers, making them irrelevant for applications. Recently the use of SC cascading in a combination of fluoride and chalcogenide fibers have seen MIR SC lasers reaching 11m with average powers around 100mW and high repetition rates [1], [2]. Here we review the state-of-the art in MIR SC lasers and demonstrate a design that provides MHz repetition rates while not using any amplifier along the fiber chain, which makes it simple, cheap and robust [2] [see spectrum in Fig. 1(g) ]. Such MHz MIR SC lasers covering most of the molecular fingerprint region are ideal for hyperspectral imaging [3] [see Fig. 1(a-f) ] and real-time Optical Coherence tomography (OCT) when combined with ultra-fast upconversion detectors [4] [see Fig. 1(h-k) ]. We present the latest results within these two particular applications, as well as in spectroscopy based trace-gas detection.

Original languageEnglish
Title of host publicationProceedings of 2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
PublisherIEEE
Publication dateJun 2021
ISBN (Electronic)9781665418768
DOIs
Publication statusPublished - Jun 2021
Event2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference - Virtual event, Munich, Germany
Duration: 21 Jun 202125 Jun 2021
https://www.cleoeurope.org/

Conference

Conference2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
LocationVirtual event
Country/TerritoryGermany
CityMunich
Period21/06/202125/06/2021
Internet address
Series2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

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