When an ultrafast laser beam is transmitted through optics, the pulses chirp and broaden.
Bote chirped mirrors have negative group velocity dispersion to compensate for these pulse broadening effects.
Low phase distortion, negative group delay dispersion P light reflectance RP>99.8% at 700–900 nm wavelength, with 5° AOI compensation The pulse broadening effect of the ultrafast beam polishes uncoated surfaces for processing at other wavelengths transmission
Bote’s low group delay dispersion (GDD) ultrafast mirrors are designed for applications using a variety of lasers.
The multi-layer dielectric coating on the mirror surface is designed to achieve minimal GDD and is optimized for maximum reflectivity in specific wavelength ranges of different laser operations, making it ideal for ultrafast beam delivery applications.
Fused silica is an extremely high purity synthetic amorphous silica. This amorphous, colorless quartz glass has an extremely low thermal expansion coefficient, good optical properties and a high damage threshold.
As the substrate of our ultrafast mirror, it can meet the application requirements of high-energy ultrashort laser pulses.
The working wavelength range of ultrafast mirrors is 460 nm-590 nm, 700 nm-930 nm, 970 nm-1150 nm and 1400 nm-1700 nm. The beam is incident from 45°, and the reflectivity is as high as 99.5% or more.
If required Low group delay dispersion mirrors for other wavelength ranges, please contact technical support.
Specification:
| Materials | UV Fused Silica | Thickness Tolerance | ±0.1 mm |
| Reflectivity | Rs, Rp＞99%@designed wavelength（AOI： 45°） | Dimension Tolerance | +0.0/-0.1 mm |
| Parallelism | <10 arcsec | AOI | 45° |