Chirped Chirped Mirror WQ-CM-1030-250

Overview

The Chirped Mirror 1030nm (-250 fs² per bounce) delivers mid-range group delay dispersion (GDD) compensation optimized for chirped pulse amplification (CPA) and OPCPA systems operating at the Yb:fiber and Yb:YAG wavelength. With -250 fs² GDD per bounce, this mirror is specifically engineered for external pulse compressors and post-amplifier dispersion management where approximately 24 bounces compensate ~6000 fs² of accumulated positive dispersion—ideal for balancing stretcher-amplifier-compressor architectures without excessive folding angles or footprint.

Unlike higher-GDD mirrors that limit compressor design flexibility or lower-GDD variants requiring 40+ bounces, this -250 fs² specification strikes an optimal balance between compact optical layouts and fine-tunability. P-polarization optimization ensures maximum GDD fidelity and minimal higher-order dispersion artifacts in multi-bounce configurations, critical for sub-200 fs pulse compression in industrial and scientific ultrafast laser systems.

Applications

• Yb:fiber CPA systems: External compressors for 300–500 fs industrial micromachining and medical laser platforms requiring precise GDD compensation after fiber-based stretcher-amplifier chains
• Regenerative amplifier compression: Post-amplifier pulse compression in Yb:YAG and Yb:KGW regenerative amplifiers for ultrafast spectroscopy and time-resolved imaging
• OPCPA back-end compression: GDD management in 1030nm-pumped optical parametric chirped pulse amplification systems for attosecond science and high-field physics
• Hollow-core fiber compressor staging: Dispersion pre- or post-compensation in multi-stage spectral broadening setups targeting few-cycle pulse generation

Construction & Performance

Manufactured on low-dispersion UVFS substrates, the WQ-CM-1030-250 features ion beam sputtered (IBS) multilayer dielectric coatings delivering -250 ± 10 fs² GDD per reflection with >99.5% reflectance across the 1010–1050nm bandwidth. Optimized for P-polarization at 0–10° angle of incidence (AOI), the coating maintains flat GDD response and low group delay ripple (<15 fs) to preserve temporal pulse fidelity. The 0.2 J/cm² laser-induced damage threshold (LIDT) for femtosecond pulses supports multi-millijoule compressed energies in typical 4–6mm beam diameter compressor geometries.

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.