Our Nd:YAG laser harmonic beamsplitters act as dichroic filters to separate laser harmonics after frequency multiplication. These beamsplitters are precision polished select grade fused silica coated with hard refractory multilayers for high damage threshold.
High fluence Nd:YAG lasers may be used safely with these mirrors. Extra durable multilayer coatings are used for both the front beamsplitting surface, and the AR-coated back surface. This results in typical damage threshold at 1064 nm of 5 MW/cm2 for CW, 5 J/cm2 for 0.1–100 nsec pulses. Typical damage threshold at 532 nm is 2.5 MW/cm2 for CW, 2.5 J/cm2for 0.1–100 nsec pulses.
Reflection and transmission at wavelengths other than the specified wavelengths are uncontrolled and can vary significantly from the curve shown. Use of beamsplitters outside the design wavelengths is not recommended.