1300-2000nm Chirped Mirror -70fs²

Overview

The 1300-2000nm Chirped Mirror -70fs² is a high-performance dielectric chirped mirror engineered for compression and dispersion management in near-infrared ultrafast laser systems. Center wavelength 1400 nm with reflectance bandwidth spanning 1000–1800 nm. Group delay dispersion of -70 fs² per bounce enables stretching, compression, and chirped-pulse amplification across the 1000–2000 nm window served by Er:fiber, Tm:fiber, Cr:Forsterite, and OPCPA architectures.

Applications

• Er:fiber and Tm:fiber CPA stretcher–compressor dispersion matching
• Telecom-band femtosecond OPCPA dispersion engineering
• Cr:Forsterite oscillator intra-cavity GDD compensation
• Sub-100 fs NIR pulse compression for spectroscopy and microscopy

Construction & Performance

• Substrate: UVFS, 25.4 mm diameter × 6.35 mm thick
• Coating: Dielectric Coating, R>99.2%@1000-1800nm
• Angle of incidence: 5° (P-polarization)
• Polarization: P
• Damage threshold: 0.2 J/cm² @ 800 nm reference

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 UVFS substrate.