LBTek Super Achromatic Half-Wave Plate — SAHWP25-355-1200-M

Super Achromatic Half-Wave Plate — Model SAHWP25-355-1200-M

Broadband λ/2 waveplate for 355-1200 nm, mounted in SM1 lens tube (Ø21.5 mm (SM1)).

Overview

LBTek's Super Achromatic Half-Wave Plate delivers a true λ/2 retardance across an ultra-broad wavelength range of 355-1200 nm by bonding a 6-layer quartz and CaF₂ stack at precisely designed crystal-axis angles. The super achromatic construction preserves half-wave retardance over the full specified bandwidth rather than only at a single design wavelength. Each plate is anti-reflection coated on both surfaces (R_avg < 2%) and pre-mounted in a standard SM1 lens tube marked with the fast-axis orientation, the model number and full specifications.

Key Features

• True super-achromatic design: uniform λ/2 retardance across 355-1200 nm
• 6-layer quartz + CaF₂ bonded stack with precise axis alignment
• Broadband V-coat anti-reflection: R_avg < 2% per surface, 0° AOI
• Fast-axis accuracy down to ±1° (tightest grade)
• Transmitted wavefront error specified at 632.8 nm (RMS)
• Pre-mounted in standard SM1 lens tube for direct drop-in integration
• Operating temperature -20°C to +50°C

Applications

• Broadband polarization rotation (linear to orthogonal linear)
• Ultrafast laser systems requiring wavelength-tolerant retardance
• Ellipsometry and polarization-resolved imaging
• Quantum optics and polarization-entanglement experiments
• Integration with broadband polarizing beamsplitters and prisms