CHORD

NANEO | Chord HD* is a mirror to compensate positive Group Velocity Dispersion (GVD) of all materials. We expand our NANEO | Chord series: the HD Mirror allows a higher compensation of GVD up to serval thousand fs².

These high values are due to our high presicion thickness measurement and the advanced control of our long-term stability of the mirror properties.

Calculated and measured properties of a matched HD-GVD mirror (matched for 8°)

Specification:

Wavelength:

1020nm - 1060nm

Reflection:   

> 99.9%

AOI:

0° - 8°

Absorption:

< 6*10-4

GD:

83 ± 12fs

GDD:

- 1200 ± 200fs2


Using a cascade of mirrors for about 100 bounces, the achievable negative dispersion values are comparable to compression grids. With a reflection value of 99.9% for a single mirror, the cascade reaches > 90% transmission efficiency to compressions grids are a more compact assembly and a higher stability.


* on stock