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 1650–1950 nm centered near —. 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

• 1650–1950 nm Tm:fiber CPA stretcher-compressor matching
• Holmium-band fs oscillator GDD compensation
• Telecom L-band ultrafast amplifier dispersion control
• Sub-100 fs 1.7–2.0 µm pulse engineering

Construction & Performance

• Substrate: UVFS, 25.4 mm × 6.35 mm
• Coating: Dielectric Coating, R>99.5%@1650-1950nm
• Angle of incidence: 5°
• Polarization: —
• 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.