+55 11 2839-3209

Nd:YAG Laser Harmonic Separators

Reflectance is higher than 99.5% for the wavelength of interest and transmittance is at least 90% for the rejected wavelengths. Offered on Ø 0.5 or 1 inch substrates of BK7 or UVFS with surface flatness λ/10; The rear surface of harmonic separators is antireflection coated.

 

Material
UV grade fused silica or BK7 glass
S1 Surface Flatness
λ/10 at 633 nm
S1 Surface Quality
20-10 scratch & dig (MIL-PRF-13830B)
S2 Surface Flatness λ/10 at 633 nm
S2 Surface Quality
20-10 scratch & dig (MIL-PRF-13830B)
Diameter Tolerance
+0.00 mm-0.12 mm
Thickness Tolerance
±0.25
Parallelism
<30 arcsec
Chamfer
0.3 mm at 45° typical

 

Coating
Technology
Electron beam multilayer dielectric
Adhesion and Durability
Per MIL-C-675A. Insoluble in lab solvents
Clear Aperture
Exceeds central 85% of diameter
Damage Threshold:
>5 J/cm2, 8 nsec pulse, 1064 nm typical for BK7 substrate
>8 J/cm2, 8 nsec pulse, 1064 nm typical for UVFS substrate
Coated Surface Flatness
λ/10 at 633 nm over 85% over clear aperture
Angle of Incidence
0 or 45 degrees
Back side antireflection coated: AOI 45°, R<0.5%,
AOI  0°, R<0.2%.