Nd:YAG Laser Mirror, High-Energy, 25.4 mm Diameter, 45°, 266 nm, S2 Polished

The 10QM20HM.75 is a 25.4 mm diameter, 6.35 mm thick High Energy Nd:YAG Laser Mirror coated for the fundamental 266 nm wavelengths. Its reflectivity at this wavelength is greater than 99% for both s- and p-polarization, and it is optimized for 45° AOI. The back surface is polished.
UV Fused Silica Substrate
Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a low content of inclusions with high refractive index homogeneity, a very low thermal expansion coefficient, and excellent transmittance in the wavelength regime from UV to NIR. As a result, these mirrors will perform better with temperature fluctuations and is ideal for high-energy laser applications due to its high energy damage threshold.
Specifications
- Wavelength RegionUV
- Wavelength Range266 nm
- Mirror ShapeRound
- Diameter25.4 mm
- MaterialUV Grade Fused Silica
- Coating TypeUltra-hard Dielectric
- Coating CodeHM.75
- ReflectivityRs>99.7%, Rp>99% @ 266 nm
- Surface Quality10-5 scratch-dig
- Surface Flatnessλ/10 at 632.8 nm
- Wedge≤3 arc min
- Angle of Incidence45°
- Clear Aperture≥central 80% of diameter
- Back SurfacePolished
- Back Surface Flatnessλ/5 at 632.8 nm
- Thickness6.35 mm
- Thickness Tolerance±0.5 mm
- Diameter Tolerance+0/-0.25 mm
- Chamfers0.25–0.76 mm face width
- Chamfers Angle Tolerance45° ±15°
- Cleaning
- Damage Threshold3 KW/cm2 CW
2 J/cm2 @ 10 ns, 20 Hz

Resources & Downloads
Other
10QM20HM.75 RoHS Certificate(266 kB, PDF) 10QM20HM.75_ROHS2-2021.pdf(281.6 kB, PDF)
2D Product Drawings
QM20 Series Drawing(145.5 kB, PDF)
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