Volume Holographic Grating Filters (VHG)

All Coherent Volume Holographic Grating Filters (VHGs) are bulk “solid-state” diffractive holographic filters made from a proprietary photosensitive optical glass, which unlike thin films or gels, can deliver ultra-stable, degradation free performance over an unlimited lifetime. Capable of very tight wavelength, efficiency, bandwidth, and diffraction angle control, Coherent VHGs can be precisely and reproducibly engineered to meet even the most demanding spectral and temporal specifications.

Proprietary materials, manufacturing and test processes ensure consistent, repeatable performance from every single filter, every time.