Laser 2000

IR Dual-comb Spectrometers

Mid-IR dual-comb spectrometers and frequency comb quantum cascade lasers (QCLs)

These optical systems work in the mid-IR range to probe the fingerprint region of most molecules. Their frequency comb QCL technology has multiple advantages over FTIR in the form of superior measurement speed and resolution, together with the strong intensity of a laser. Whereas step-scan and rapid-scan FTIR methods have highly broadband spectral coverage due to their globar sources, their power spectral density is limited, hindering their signal to noise ratio (SNR).

Dual comb QCLs make non-destructive, in situ analysis of sub-second reactions possible. Their ultrahigh resolution, high sensitivity spectroscopy is making strides in fields such as biospectroscopy and protein analysis, stand-off detection, catalysis, combustion diagnostics, stopped-flow kinetics, polymer development, and more.

A wide range of sample configurations are compatible, including: transmission cells, ATR and diffuse reflectance setups, stopped-flow techniques, multipass gas cells, and fibre optic probes.

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This complete dual-comb mid-IR spectrometer overcomes the limitations of speed, SNR and spectral resolution of FTIR spectroscopy. A full spectrum can be acquired in 1 ms and the highly intense QCL laser source enables high SNRs >1000 in 100 ms measurement time. All achieved with a default spectral resolution of 0.25-0.5 cm-1
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This gas multipass cell is an ideal tool for fast gas exchange, fast reaction monitoring and breath analysis. It can be integrated into process streams, and is robust against vibration. Two pathlengths are available. Used in trace gas analysis, multipass cells fold long optical paths into a small volume to increase the sensitivity of optical measurements and maximise the detection limit
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A turnkey laser system for dual-comb mid-IR spectroscopy, with drive electronics and control computer with GUI. This module combines two overlapping free-running QCL frequency comb lasers and outputs co-aligned beams, with a choice of central laser wavelengths across 4.5-11.1 µm (2200-900 cm-1)
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IRSweep bring high-performance mid-IR sensing to field applications, enabling researchers and industry scientists to be faster and more precise in their mid-IR absorption spectroscopy measurements. Their IRis-core and IRis-F1 systems exploit the extraordinary sensing power of Quantum Cascade Laser (QCL) Frequency Combs invented by IRsweep’s co‐founders in 2012 at ETH Zurich, offering an unmatched combination of high measurement speed (ms time resolution), high laser brightness, and multi‐colour output. With this formidable speed and photonic intensity, IRSweep’s vision is to revolutionise optical sensing by changing the face of mid-IR research, process analytics, and high throughput screening.

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