800nm Chirped Mirror CM1483-12.7-6.35

Overview

The 800nm Chirped Mirror -65fs² (CM1483-12.7-6.35) from Ultrafast Innovations delivers precise negative group delay dispersion (GDD) of -65 fs² per bounce across 650–900 nm, centered at 775 nm. This chirped mirror is engineered for Ti:Sapphire oscillator and amplifier systems requiring moderate dispersion compensation without excessive cavity complexity.

With a GDD magnitude of 65 fs² per reflection, this mirror occupies the sweet spot between ultra-compact designs and single-bounce compensation efficiency. Compensating typical intracavity dispersion of ~6000 fs² requires approximately 92 bounces, making it ideal for double-pass or folded-path dispersion management schemes in chirped pulse amplification (CPA) systems and oscillator cavities where space permits distributed compensation. The broadband 650–900 nm range ensures compatibility with spectral broadening stages and wavelength-tunable Ti:Sapphire sources.

Applications

• Ti:Sapphire oscillator intracavity GVD compensation – distributed dispersion management across multiple mirror pairs for sub-20 fs pulse generation
• CPA stretcher/compressor pre-compensation – fine-tuning residual higher-order dispersion in amplifier systems operating near 800 nm
• OPA and OPCPA pump beam conditioning – GDD compensation for 775 nm pump pulses to maintain temporal fidelity before nonlinear conversion
• Multi-pass amplifier dispersion control – cumulative negative GDD balancing in regenerative and multipass Ti:Sapphire amplifier architectures

Construction & Performance

Manufactured on 12.7 mm diameter × 6.35 mm thick UVFS substrates, the CM1483 features ion beam sputtered (IBS) multilayer dielectric coatings optimized for P-polarization at 0° angle of incidence (AOI). Reflectance exceeds 99.7% throughout the entire 650–900 nm operational bandwidth, ensuring minimal losses in multi-bounce configurations. The LIDT specification of 0.2 J/cm² supports femtosecond pulse handling in standard oscillator and moderate-energy amplifier environments. The compact 12.7 mm form factor enables dense mounting in optical breadboard layouts and commercial laser cavity assemblies.

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.