Posted in | Electron Microscopy

CW-MHF Mid-IR Laser: High-Performance Mid-IR Spectroscopy

The CW-MHF Mid-IR laser is the ultimate instrument for high-resolution mid-IR spectroscopy. The DRS Daylight CW-Mode-Hop-Free laser is suitable for users requiring phase-continuous tuning to prevent spectral line hopping, high spectral resolution, or both.

The goal for any laser system is to achieve MHF tuning and narrow-linewidth operation. With open-loop line widths of ≤ 5 MHz (over 100 ms) and MHF tuning to > 30 cm–1, and frequently to > 100 cm–1, the CW-MHF system is unique in the industry.

The CW-MHF laser achieves this performance using a very stable laser cavity, led by finite element analysis, intended to reduce sensitivity to acoustic perturbation. 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 protect 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 & Applications

The CW-MHF Mid-IR Laser’s unique feature set and industry-leading performance allow for a wide range of sensitive spectroscopy techniques and applications.

Spectroscopy Techniques

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


  • Process control
  • 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

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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