Product Description
100mm Fused Silica Dichroic Beamsplitter Plate – Harmonic Separator for Laser Systems
This is a high-performance dichroic beamsplitter plate fabricated from UV-grade fused silica, designed for efficient harmonic separation in multi-wavelength laser systems. With a λ/10 flatness and optimized dielectric coating, it provides precise spectral control for separating visible alignment beams from UV output in frequency-tripled Nd:YAG applications.
Key Specifications:
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Diameter: 100 mm
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Clear Aperture: 92 mm
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Thickness: 11.5 mm
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Substrate: UV-grade fused silica (low thermal expansion, high laser damage threshold)
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Flatness: λ/10 @ 633 nm (high-precision reference grade)
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Coating: Dielectric dichroic on one side; reverse side uncoated polished
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Spectral Performance @ 45° AOI:
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R > 98.5% at 632.8 nm (HeNe alignment beam – highly reflected)
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T > 75% at 355 nm (Nd:YAG third harmonic UV – efficiently transmitted)
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Why This Beamsplitter Is Exceptional:
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Dual-Wavelength Optimization: Specifically engineered to separate 632.8 nm (visible red) and 355 nm (UV) with high efficiency—critical for frequency-tripled Nd:YAG systems.
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High-Precision Substrate: The λ/10 flatness ensures minimal wavefront distortion, making it suitable for interferometric or precision alignment applications.
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Proven Lab Provenance: Sourced from laser research/industrial equipment, ensuring professional-grade quality.
Applications:
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Harmonic Separation in Nd:YAG Lasers: Efficiently separate the 1064 nm fundamental, 532 nm second harmonic, or 355 nm third harmonic from visible pilot/alignment beams.
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Multi-Wavelength Beam Combining/Splitting: In advanced laser systems for materials processing, pumping tunable lasers, or spectroscopic research.
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Precision Interferometry: Use the uncoated side as a reference surface in laser-based measurement setups.
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Laser System Alignment & Diagnostics: Ideal for aligning UV beams while monitoring with a visible co-aligned HeNe.



