North Optics’s Femtoline Low GDD Mirrors are designed to provide high reflectance without additional temporal dispersion around a narrow bandwidth of central wavelength for femtoline lasers. The cutting-edge low GDD (Group Delay Dispersion) coating techniques of the mirrors help to minimize phase distortion and maintain the beam profile of the femtosecond pulses during light propagation. The substrates are made from UV Fused Silica, an excellent low-inclusion glass material with superior optical properties, mechanical strength, and low thermal expansion.

Compared with ultrafast-enhanced silver mirrors, low GDD mirrors utilize dielectric coatings which have a lower GDD, higher reflection coefficient, and higher damage threshold (300mJ @800nm,100fs), thus exhibiting exceptional performance for high-power femtosecond laser applications. However, low GDD mirrors are engineered to operate within a narrower wavelength range than ultrafast-enhanced silver mirrors.

Shanghai North Optics offers stocked Femtoline Low GDD mirrors with high reflection in the following wavebands or wavelengths: 400nm, 532nm, 800nm, 808nm, 760-840nm, 1030nm, 1000-1060nm, 1064nm, at incident angles of 0 degrees and 45 degrees. Corning UV fused silica 7980 0F (Click on the link to view material properties) are selected as the substrate materials to ensure reliable optical properties of the mirrors. Custom GDD mirrors with other reflection wavebands are also accessible upon request.

North Optics is a leading supplier of optical mirrors. With over ten years of experience, we have developed our high-tech production line and in-house ISO9001-compliant inspection labs to ensure the quality of our products before dispatch. Apart from industrial-grade mirrors, we also offer super-polished mirror substrates.