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Mirrors for Quantum Cascade Lasers, (QCL's)

Gold coated mirrors or Molybdenum mirrors, which combine high reflectivity and chemical inertness, are perfect for QCL applications. The high optical power output, tuning range, and room temperature operation make Qunatum Cascade Lasers ideal for spectroscopic applications, such as remote sensing of environmental gases, and pollutants in the atmosphere.

Industrial process control, and medical diagnostics are being developed with QCLs. Metal mirrors for multi pass gas cells have been a speciality of Laser Beam Products for more than 20 years.

Other Infrared emitters in the 2–5 μm wavelength atmospheric window are finding uses where Protected silver coated mirrors based on alumiunium or copper substrates can give good infrared reflectivity (99%), and visible reflectivity (99%). The visible reflectivity of a silver coated mirror is useful for alignment and adjustment with a visible laser diode.