100mm fused silica dichroic beamsplitter

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:

• Diameter: 100 mm

• Clear Aperture: 92 mm

• Thickness: 11.5 mm

• Substrate: UV-grade fused silica (low thermal expansion, high laser damage threshold)

• Flatness: λ/10 @ 633 nm (high-precision reference grade)

• Coating: Dielectric dichroic on one side; reverse side uncoated polished

• Spectral Performance @ 45° AOI:

  • R > 98.5% at 632.8 nm (HeNe alignment beam – highly reflected)

  • T > 75% at 355 nm (Nd:YAG third harmonic UV – efficiently transmitted)

Why This Beamsplitter Is Exceptional:

• 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.

• High-Precision Substrate: The λ/10 flatness ensures minimal wavefront distortion, making it suitable for interferometric or precision alignment applications.

• Proven Lab Provenance: Sourced from laser research/industrial equipment, ensuring professional-grade quality.

Applications:

• 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.

• Multi-Wavelength Beam Combining/Splitting: In advanced laser systems for materials processing, pumping tunable lasers, or spectroscopic research.

• Precision Interferometry: Use the uncoated side as a reference surface in laser-based measurement setups.

• Laser System Alignment & Diagnostics: Ideal for aligning UV beams while monitoring with a visible co-aligned HeNe.