Posted in | Lasers

CW-MHF Mid-IR Laser: The Ultimate Tool for High-Resolution Mid-IR Spectroscopy

The CW-MHF Mid-IR Laser is the ideal instrument for high-resolution mid-IR spectroscopy. The DRS Daylight CW-Mode-Hop-Free laser is ideal for those requiring high spectral resolution, phase-continuous tuning to avoid spectral line jumps, or both.

Narrow-linewidth operation and MHF tuning are extremely difficult to achieve in any laser system. The CW-MHF system is unique in the market, with open-loop line widths of ≤ 5 MHz (over 100 ms) and MHF tuning to > 30 cm–1, and often > 100 cm–1.

The CW-MHF laser achieves this performance via years of precise engineering and manufacturing knowledge and an extremely stable laser cavity engineered to be less susceptible to acoustic perturbation using finite element analysis. The CW-MHF laser also has two techniques for adjusting wavelength: PZT or current 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

  • Proprietary HFQD™ technology to safeguard the chips
  • Superb TEM00 beam quality, low beam pointing
  • Wavelength availability: < 4 to > 11 µm
  • SideKick™ controller, GUI, and SDK are included with all systems
  • Ultra-quiet, with RIN as low as -140 dBc/Hz, enables higher-SNR spectroscopy
  • 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 & 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

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


  • 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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