800nm Chirped Mirror HD15-25.4-6.35

Overview

The 800nm Chirped Mirror -1300fs² (Ultrafast Innovations HD15) delivers high negative group delay dispersion (GDD) of -1300 fs² per bounce at 805nm center wavelength, optimized for compact dispersion compensation in Ti:Sapphire laser systems. This high-GDD chirped mirror enables efficient pulse compression with minimal bounces—compensating ~6000 fs² of positive chirp requires only 5 reflections, reducing cavity complexity and alignment sensitivity compared to conventional low-GDD mirror pairs.

Engineered for the 780–830 nm bandwidth with P-polarization at 5° angle of incidence (AOI), this 805nm chirped mirror provides >99% reflectance across the full spectral range, making it ideal for intracavity GDD compensation in ultrafast oscillators and external CPA compressor stages where space constraints demand high dispersion per bounce.

Applications

• Ti:Sapphire Oscillator GDD Compensation: Intracavity dispersion management for sub-10 fs pulse generation, compensating positive GVD from gain media and cavity optics
• CPA System Pulse Compressors: Compact post-amplification compression stages in chirped pulse amplification setups operating near 800 nm
• OPA and OPCPA Pump Line Management: Dispersion pre-compensation for 800 nm pump beams in optical parametric amplifier systems to optimize temporal overlap
• High-Repetition-Rate Femtosecond Systems: Space-efficient dispersion control in industrial and scientific ultrafast laser platforms where compact footprint is critical

Construction & Performance

Manufactured on 25.4 mm diameter × 6.35 mm thick UV-fused silica (UVFS) substrate for excellent thermal stability and low absorption at 800 nm. The multilayer dielectric coating is deposited via ion beam sputtering (IBS) to achieve R>99% from 780–830 nm with precise GDD control of -1300 fs² ±5%. Specified for P-polarization at 5° AOI, this chirped mirror supports laser damage threshold of 0.2 J/cm² for femtosecond pulses, suitable for high-peak-power ultrafast applications.

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.