CW-MHF Mid-IR Laser: Advanced Mid-IR Spectroscopy Solutions

The best instrument available for high-resolution mid-IR spectroscopy is the CW-MHF Mid-IR Laser. For users who want phase-continuous tuning to prevent spectral line hopping, high spectral resolution, or both, the DRS Daylight CW-Mode-Hop-Free laser is a suitable option.

In any laser system, achieving narrow-linewidth functioning and MHF tuning is challenging. The CW-MHF system, which is unique in the industry, offers MHF tuning to > 30 cm–1 and frequently to > 100 cm–1, together with open-loop linewidths of ≤ 5 MHz (around 100 ms).

The CW-MHF laser achieves this performance using a highly stable laser cavity intended to limit sensitivity to acoustic perturbation, led by finite element analysis. This design draws on years of expertise in precision engineering and manufacturing.

The CW-MHF laser offers two methods for changing wavelength: current modulation and PZT modulation. This unique combination of modulation capabilities, narrow-linewidth operation, and broad MHF tuning allows locking to a wavelength reference and/or high-resolution spectroscopy.


Features & Benefits

  • Ultra-quiet, with RIN as low as -140 dBc/Hz, enables higher-SNR spectroscopy
  • Superb TEM00 beam quality, low beam pointing
  • SideKick™ controller, GUI, and SDK included with all systems
  • Proprietary HFQD™ circuitry to safeguard the chips
  • Wavelength availability: < 4 to >11 µm
  • MHF tuning range: ≥ 30 to 100 cm-1 (typical, depending on model)
  • CW power > 70 mW typical*
  • Linewidth (FWHM < 5 MHz (10 ms) and < 10 MHz (1s)
  • Wavelength accuracy of ± 0.5 cm-1 (± 15 GHz), unidirectional

Techniques and Applications

The CW-MHF Mid-IR Laser’s distinct feature set and industry-leading performance allow for a diverse variety of sensitive spectroscopy techniques and applications:

Spectroscopy Techniques

  • Photoacoustic
  • Gas phase
  • High resolution
  • Rotational-vibrational
  • Cavity ring-down


  • Nanoscale imaging
  • Biomarker detection in breath
  • Chemical and biological agent sensing
  • IR sensor development
  • Environmental monitoring
  • Fence line monitoring
  • Combustion diagnostics
  • TIC, VOC, GHG, and explosives detection
  • Process control

Product Specifications

Source: DRS Daylight Solutions Inc.

. . .
Operation Continuous wave, mode-hop-free (CW-MHF) and extended CW tuning
Center Wavelength Availability < 4 to > 11 µm

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