Wavelength Separating/Combining Coatings

Download Coating Datasheet (PDF, 215 KB)

Very often it is necessary to separate a laser's harmonics from its fundamental wavelength, or to combine dissimilar wavelengths so that they will travel along the same optical path. These specialized functions are performed using engineered multi-layer coatings, resulting in optical elements called beam separators and beam combiners, respectively.

Wavelength R/T, nm Minimal
reflection, %
Minimal
transmission, %
AOI, deg Damage threshold,
J/cm2, 10 ns pulse
532/1064 99 93 0, 45 3
355/532 & 1064 99 90 and 92, respectively 0, 45 3
800/400 99 90 0, 45 3
1064/808 99 93 0, 45 3

 HR coating at 532 nm and HT coating at 1064 nm, 45°, UNP
Fig. 1 HR coating at 532 nm and HT coating at 1064 nm, AOI=45°, unpolarized radiation.

HR coating at 355 nm and HT coating at 532 and 1064 nm, 0°
Fig. 2 HR coating at 355 nm and HT coating at 532 and 1064 nm, AOI=0°.

 

 

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