CW-MHF™ Mid-IR Laser

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CW-MHF™ Mid-IR Laser: Tune > 30 cm-1 Without Mode Hops

The CWMHF Mid-IR Laser is the ultimate tool for high-resolution, mid-IR spectroscopy. If you need high spectral resolution, phase-continuous tuning to avoid jumping over spectral lines, or both, the DRS Daylight CW-Mode-Hop-Free laser will meet your needs. Narrow-linewidth operation and MHF tuning is a high bar to reach in any laser system. Unique in the industry, the CWMHF system provides open-loop linewidths of ≤ 5 MHz (over 100 ms) and MHF tuning to > 30 cm-1, and often to > 100 cm-1*. Drawing on years of precision engineering and manufacturing experience, the CWMHF laser achieves this performance with a highly stable laser cavity that, guided by finite element analysis, was designed to reduce susceptibility to acoustic perturbation. The CWMHF laser also includes two ways to modulate wavelength: via a PZT or current modulation. This exclusive combination of wide MHF tuning, narrow-linewidth operation, and modulation capability enables high-resolution spectroscopy and/or locking to a wavelength reference.

Features & Benefits:

  • 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
  • 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 your chips

Techniques & Applications

The unique feature set and industry-leading performance of the CWMHF Mid-IR Laser enable a wide range of sensitive spectroscopy techniques and applications:

Spectroscopy techniques

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


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

Related Products:

CW-MHF™ Featured Research

We did it.

Narrow-line width operation and MHF tuning in one laser system? Absolutely. Call us today to find out how we did it and how it can improve your application.

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