1300-2000nm Chirped Mirror -400fs²

Overview

The 1300-2000nm Chirped Mirror -400fs² is a high-performance dielectric chirped mirror engineered for compression and dispersion management in ultrafast laser systems. Reflectance bandwidth spans 1350–1750 nm centered near 1575 nm. Group delay dispersion of -400 fs² per bounce enables stretching, compression, and chirped-pulse amplification across the NIR window served by Er:fiber, Tm:fiber, Cr:Forsterite, and OPCPA architectures.

Applications

• High-power Tm:fiber CPA stretcher-compressor matching
• Large-aperture beam routing for kW-class NIR amplifiers
• 1575 nm OPCPA dispersion engineering
• Industrial NIR fs system dispersion management

Construction & Performance

• Substrate: UVFS, 80 mm × 20 mm
• Coating: Dielectric Coating, R>99.7%@1350-1750nm
• Angle of incidence: 5°
• Polarization: P
• Damage threshold: 0.2 J/cm² @ 800 nm reference (fs pulses)

Storage & Handling

Store in low-humidity dry cabinet with optical-grade lens tissue protection. Handle by the edges only — coating surface contact will degrade reflectance and damage threshold. Clean with high-purity acetone or methanol using the drop-and-drag technique; never wipe across the coated face. Avoid extreme temperature gradients that can cause stress birefringence in the substrate.