Dual Laser Line
Dielectric Mirrors
Laser line mirrors are fabricated with specialized coatings that offer high damage thresholds, making them well suited for use with a range of high-powered CW or pulsed laser sources. They are designed to withstand the high-intensity beams typically produced by Nd:YAG, Ar-Ion, Kr-Ion, and CO2 lasers.
Paralight Optics offers dual laser line dielectric mirrors with high average reflectivity greater than 99% and high damage threshold. We can produce custom mirror sizes, geometries (i.e. plano, spherical, and aspheric mirrors), substrate materials, and coatings.
Features:
Material Compliant:
RoHS Compliant
Coating Optimization:
Dielectric HR coating on one surface, R>99.5% for random polarization. Rear surface ground or polished
Optical Performance:
High Reflectivity, R>99% @ Two Wavelength
Laser Damage Threshold:
Providing High Damage Threshold
Common Specifications:
Note: A fine ground back surface is frosted and will diffuse light that is not reflected by the mirror’s front surface.
Parameters
Ranges & Tolerances
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Substrate Material
N-BK7 (CDGM H-K9L)
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Type
Dual Laser Line Dielectric Mirror
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Size
Custom-made
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Size Tolerance
+0.00/-0.20mm
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Thickness
Custom-made
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Thickness Tolerance
+/-0.2 mm
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Chamfer
Protective < 0.5mm x 45°
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Parallelism
≤1 arcmin
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Surface Quality (scratch-dig)
60-40
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Surface Flatness @ 632.8 nm
< λ/10 uncoated per 25mm range
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Clear Aperture
>90%
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Coating
Dielectric HR coating, R>99%, rear surface ground or polished
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Laser Damage Threshold
5 J/cm2 (20 ns, 20 Hz, @1.064 μm)
Graphs
These plots of the reflectance for dual laser line of 350-360nm & 527-532nm, 527-532nm & 1047-1064nm, 633-660 & 1047-1064nm respectively show that high reflectivity for design wavelength at 0° AOL.
Reflectance Curve for 527-532nm & 1047-1064nm Dual Laser Line Dielectric Mirror at 0° AOL, Unpol.
