Supercontinuum sources are all-fiber pulsed laser-driven systems that provide high power spectral densities within ultra-broadband ranges. The tailored process of generating broadband, bright, and spectrally flat supercontinua-through a complex interplay linear non-linear processes-has been recently pushed further towards longer wavelengths has evolved enough to enter the field mid-infrared (mid-IR) spectroscopy. In this work, we review current state perspectives technology offers laser-like...

Abstract In this contribution, we demonstrate a wide-field hyperspectral mid-infrared (MIR) microscope based on multidimensional single-pixel imaging (SPI). The employs high brightness MIR supercontinuum source for broadband (1.55 $$\upmu \hbox {m}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>μ</mml:mi> <mml:mtext>m</mml:mtext> </mml:mrow> </mml:math> –4.5 ) sample illumination. Hyperspectral capability is achieved by single micro-opto-electro-mechanical...

We introduce a compressive sensing based approach for single pixel hyperspectral chemical imaging in broad spectral range the near-infrared. Fully integrated MEMS Fabry-Pérot tunable filter spectrometers and digital micro-mirror device were employed to achieve spatial resolution, respectively. The available from 1500 2200 nm covers molecular overtone vibrations enabling identification. Hyperspectral images of different adhesives deposited on textile recorded revealing their composition....

Recent developments and commercial availability of low-noise bright infrared (IR) supercontinuum sources initiated intensive applied research in the last few years. Covering a significant part near- mid-infrared spectral ranges, radiation opened up unique possibilities alternatives for well-established imaging technique optical coherence tomography (OCT). In this contribution, we demonstrate development, performance, maturity cost-efficient dual-band Fourier-domain IR OCT system (2 µm 4...

We present a mid-infrared spectroscopic system based on spectral-coding approach enabled by modified digital micromirror device (DMD). A supercontinuum source offering confined laser beam is employed to perform gas measurements with this system. The performance, flexibility, and programmability the DMD experimentally demonstrated gas-cell (CO2, CH4, N2O, NO2 CO). Full spectra are acquired in 14 ms at 10 nm spectral resolution 3.5 40 resolution. Further, we employ for stand-off open-path...

We report on a technically simple approach to achieve high-resolution and high-sensitivity Fourier-domain OCT imaging in the mid-infrared range. The proposed system employs an InF3 supercontinuum source. A specially designed dispersive scanning spectrometer based single InAsSb point detector is employed for detection. enables structural spectral range from 3140 nm 4190 with characteristic sensitivity of over 80 dB axial resolution below 8 um. capabilities are demonstrated porous ceramic...

In this contribution, we present a high-speed, multiplex, grating spectrometer based on spectral coding approach that is founded principles of compressive sensing. The employs single-pixel InGaAs detector to measure the signals encoded by an amplitude spatial light modulator (digital micromirror device, DMD). This leads speed advantage and multiplex sensitivity atypical for standard dispersive systems. Exploiting 18.2 kHz pattern rate DMD, demonstrated 4.2 ms acquisition times full spectra...

A rugged handheld sensor for rapid in-field classification of cannabis samples based on their THC content using ultra-compact near-infrared spectrometer technology is presented. The device designed use by the Austrian authorities to discriminate between legal and illegal directly at place intervention. Hence, allows direct measurement through commonly encountered transparent plastic packaging made from polypropylene or polyethylene without any sample preparation. time below 20 s. Measured...

A hyperspectral mid-infrared (MIR) microscope utilizing single-pixel imaging (SPI) technology is demonstrated. The system integrates a tunable (8.3 µm − 11.1 µm) MIR quantum cascade laser (QCL) and modified micro-opto-electro-mechanical digital micromirror device (DMD) for spatial light modulation. As part of the system’s design, diffraction on DMD chip experimentally analyzed. Based this analysis, first order was selected an optimal optical configuration thus providing high modulation...

In the past decade, mid-infrared lasers emerged as cost-effective alternatives for routine infrared spectroscopy, notable their brightness and coherence. We review advancements in IR spectroscopy techniques tailored mid-IR supercontinuum sources.

In this contribution, we address the core of any Fourier transform (FT) spectrometer$\unicode{x2013}$the interferometer$\unicode{x2013}$in perspective recent emergence spatially coherent broadband infrared (IR) sources. As a result, report on design wavefront-division interferometer for spectroscopic applications in mid-IR and beyond. The theoretical framework proposed wavefront division is discussed, an analytical solution to determine far-field interference pattern derived. verified by...

We report on the design of an all-mirror wavefront-division interferometer capable spectroscopic studies across multiple spectral ranges-from plasma frequencies metals to terahertz wavelengths and beyond. The proposed method leverages properties laser sources with high spatial coherence. A theoretical framework for scheme is presented, along analytical solution determining far-field interference pattern, which validated through both optical propagation simulations experimental results....

In this contribution, the current state of high-brightness supercontinuum generation is reviewed from perspective applied mid-infrared spectroscopy. The key emission properties practical interest are discussed and quantified; potential spectroscopic scenarios listed.

Mid-infrared (MIR) hyperspectral imaging allows for spatially resolved chemical imaging, making it highly attractive many branches. However, expensive MIR array detector technology limits its application. Here, we present a cost-effective detection system based on single-pixel approach using an MIR-enhanced digital micromirror device. For illumination supercontinuum source was used completing the microscope. It acquiring cubes with 64x64 pixels and 120 nm spectral resolution within ≈450 ms....

Mid-infrared (mid-IR) hyperspectral imaging is of great practical interest in various fields science and industry due to its ability provide spatially resolved label-free chemical information. However, the widespread adoption advancement mid-IR are hindered by high costs specification lag focal plane arrays. In this contribution, we propose a method circumvent problem thus demonstrate solution for through use single-pixel paradigm involving enhanced digital micro-mirror device (DMD); as...

We demonstrate a mid-infrared modified digital micromirror device and its application as spatial light modulator for fast (ms-regime) flexible (freely programmable) infrared spectral-coding spectroscopy well hyperspectral imaging.

Abstract In this contribution, we demonstrate a hyperspectral mid-infrared (MIR) microscope based on multidimensional single-pixel imaging (SPI). The employs high brightness MIR supercontinuum source for broadband (1.55 µm - 4.5 µm) sample illumination. Hyperspectral capability is achieved by single micro-opto-electro-mechanical digital micromirror device (DMD), which provides both spatial and spectral differentiation. For that purpose the operational bandwidth of DMD was significantly...

The global cost of corrosion imposes a significant burden on society, with safety and environmental consequences in addition to its direct impact. One challenge management is that the process complex, common experimental techniques provide only limited information. neutral salt spray test, standardized test used for evaluation resistance steels coatings, creates an aggressive environment not suitable many analytical methods. Here, we report first use situ Raman spectroscopy detect formation,...

Recently emerged near-infrared (NIR) spectrometers based on micro-electromechanical systems (MEMS) are a highly compact, rugged and cost-efficient alternative to infrared conventionally used in industrial environments. The majority of the devices currently available designed for measurements diffuse reflection geometry close contact with sample, built-in low-power halogen light sources – usually intended consumer applications. However, most material characterization applications environment...