Frequently used in multi-frequency laser output systems (e.g. frequency doubling)
Coatings are provided by Ion Beam Sputtering (IBS) or Electron beam evaporation with/without Ion assistance coating techniques
Dual AR coatings designed to reduce the reflectivity of a
component to near-zero for two certain wavelengths. Usually
these coatings are used in multi-frequency laser output systems
(e.g. frequency doubling).
This coating provides very high transmission at two different
wavelengths. Typical wavelengths and reflection curves of an AR
coating suitable for the prevalent laser system output at 1064 nm
and 532 nm are shown below.
Dual Anti-Reflection Coatings
Residual average Reflectivity @ 0° AOI, %
Coating Adhesion and Durability
>90% of diameter
Laser Damage Threshold
>6 J/cm2 for 10 ns pulses @ 1064 nm
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