Holographic notch filters (HNF) are replacing dielectric filters in certain optical systems that incorporate single line laser sources. HNF characteristics, physical structure, specification, benefits, and customer acceptance are described for laser spectroscopy and laser surgery applications.
Harry Owen, Harry Owen,
"Holographic notch filter", Proc. SPIE 1555, Computer and Optically Generated Holographic Optics; 4th in a Series, (1 December 1991); doi: 10.1117/12.50638; https://doi.org/10.1117/12.50638