800nm Chirped Mirror HD1561-100-25

Overview

The 800nm Chirped Mirror 100fs² (HD1561-100-25) from Ultrafast Innovations delivers precisely engineered positive group delay dispersion of +100 fs² per bounce at 845 nm center wavelength. This high-dispersion chirped mirror provides GDD compensation across the 710–980 nm spectral range with >99.8% reflectance, making it an essential component for pre-chirping and dispersion management in Ti:Sapphire-based ultrafast laser systems.

With moderate positive GDD of 100 fs² per bounce, this mirror enables practical dispersion compensation in compact geometries—approximately 60 bounces compensate 6000 fs² of accumulated GVD. The positive dispersion characteristic makes it ideal for pre-compensation before compressor stages in chirped pulse amplification (CPA) systems and for fine-tuning pulse duration in oscillator cavities operating around 800 nm.

Applications

• Ti:Sapphire CPA Pre-Chirping: Positive GDD compensation before stretcher-amplifier chains to optimize recompression and minimize higher-order dispersion
• OPCPA Pump Line Dispersion Management: Fine-tuning temporal overlap between pump and signal pulses in optical parametric chirped pulse amplification systems
• Ti:Sapphire Oscillator Cavity Tuning: Intracavity dispersion control for sub-100 fs pulse generation at 800 nm wavelengths
• OPA Pumping Systems: Pulse conditioning in regenerative amplifiers driving optical parametric amplifiers in the near-IR

Construction & Performance

Manufactured on 100 mm diameter, 25 mm thick UVFS substrate with ion beam sputtered (IBS) multilayer dielectric coating. Specified for P-polarization at 5° angle of incidence (AOI) with R>99.8% across the full 710–980 nm bandwidth. The HD1561 design features ultralow loss and tight GDD tolerance, ensuring predictable dispersion behavior in multi-bounce configurations. Large aperture accommodates high-energy beam profiles in amplifier systems with damage threshold of 0.2 J/cm² for femtosecond pulses.

Storage & Handling

Operate at 25 °C, 40–60% RH. Clean only with >99% optical-grade ethanol and lint-free lens tissue using single-pass drag method. Avoid abrasive cloths and water.