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Laser Sources

Different optical/lasers sources utilized or developed in our laboratory. Coupled to advanced absorption spectroscopy techniques, they are used for trace gas detection, including biological, environmental, and medical applications:

Broadband Tunable chip-based lasers:

  1. Novel tunable chip-based laser from Chilas in the near-infrared wavelength range (c-band, 1530 nm to 1565 nm) for detection of various species (e.g. CO2, CH4, …) using Direct Absorption Spectroscopy (DAS) or Wavelength Modulation Spectroscopy

Broadband mid-infrared supercontinuum sources:

  1. Mid-infrared supercontinuum source from NKT photonics (1.5 µm - 4.2 µm) for detection of Volatile Organic Compounds (VOCs) in fruit storage facilities using a Grating Spectrometer (GS) as well as monitoring the reactants/products in a plasma gas convertor using a Fourier Transform Spectrometer (FTS)
  2. Mid-infrared supercontinuum source from NORBLIS (2.8 µm to 7.8 µm) for detection of atmospheric pollutants and greenhouse gases as well as monitoring the reactants/products in a plasma gas convertor using a Fourier Transform Spectrometer (FTS)

Quantum Cascade Lasers (QCLs):

  1. 5.4 μm (1850 cm-1) and 4.6 μm (2169 cm-1) QCL based Wavelength Modulation Spectroscopy for Nitric Oxide (NO) and Carbon Monoxide (CO) measurements for bio-medical applications (more info)

Optical Parametric Oscillators (OPOs):

  1. 3-5 μm widely tunable cw OPO pumped by a fiber laser at 1064 nm for Photo Acoustic Spectroscopy (PAS) detecting various species (CH4, HCN, …)
  2. Double crystal fs-OPO pumped by two Yb-fiber laser at 1064 μm (100 fs) for Time-Resolved Dual-Comb Spectroscopy (DCS) with application in monitoring fast chemical reactions, e.g. plasma gas conversion

EO-based Dual-Comb Source:

  1. C-band (1530 nm to 1565 nm) tunable EO-based dual-comb source (bandwidth ~6 nm) under construction for sub-surface hyperspectral imaging, as part of the project Synoptics
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