LBTek Super Achromatic Quarter-Wave Plate — SAQWP25-600-2200-M

Super Achromatic Quarter-Wave Plate — Model SAQWP25-600-2200-M

Broadband λ/4 waveplate for 600-2200 nm, mounted in SM1 lens tube (Ø21.5 mm (SM1)).

Overview

LBTek's Super Achromatic Quarter-Wave Plate delivers a true λ/4 retardance across an ultra-broad wavelength range of 600-2200 nm by bonding a 6-layer quartz and MgF₂ stack at precisely designed crystal-axis angles. Compared with compound zero-order or multi-order designs, the super achromatic construction preserves quarter-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/4 retardance across 600-2200 nm
• 6-layer quartz + MgF₂ 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 state conversion (linear ↔ circular / elliptical)
• 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