Low-GDD Mirrors for High-Power Ultrafast Lasers

29 Sep 2022

Low-GDD Mirrors for High-Power Ultrafast Lasers

EKSMA Optics offers ultra high damage threshold mirrors designed for applications with high-power and ultrashort pulse lasers. We have engineered optical coatings for optimal performance with femtosecond and picosecond laser pulses. These mirrors feature very high reflectivity, low group delay dispersion (GDD), and high laser damage threshold (LIDT) for fundamental Ti:Sapphire and Ytterbium laser wavelengths and their harmonics.

We design and supply standard as well as custom laser line and dual band mirrors for ultrafast lasers. Many components are available for quick order and delivery from the EKSMA Optics website.

Picosecond Laser Mirrors:

• R > 99.8% at 343 nm, LIDT > 0.9 J/cm²
• R > 99.95% at 515 nm, LIDT > 2.5 J/cm²
• R > 99.95% at 1030 nm, LIDT > 3 J/cm²

LIDT measurements: 10 ps, 50 kHz laser, ISO 21254-2 standard 1000-on-test procedure.

Femtosecond Laser Mirrors:

• R > 99.8% at 343 nm, *LIDT > 0.4 J/cm²
• R > 99.9% at 500-530 nm, LIDT > 0.15 J/cm²
• R > 99.9% at 760-840 nm, LIDT > 0.3 J/cm²
• R > 99.9% at 1000-1060 nm, LIDT > 0.4 J/cm²

LIDT measurements: 50 fs (* 343 nm – 200 fs), 100 Hz laser, ISO 21254-2 standard 1000-on-test procedure.

Advanced Coatings based on Ion-Beam Sputtering Technology

EKSMA Optics ion-beam sputtered coating facility allows us to meet the most critical demands on laser optics. Our optical engineering team can design and develop highly customized optical components, contact us to discuss your requirements.

Ion-beam sputtered coatings feature:

• Precisely controlled coating spectral parameters
• Highest LIDT in comparison with other coating technologies
• Stability of spectral performance and long lifetime in changing conditions