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Holographic Filters

Standard Products

Our Holographic Notch and SuperNotch® Filters are fabricated by recording interference patterns formed between two mutually coherent laser beams, unlike conventional interference filters, which are made by vacuum evaporation techniques. Since all layers are recorded simultaneously within a thick stack, the optical density of the notch filter is high and its spectral bandwidth can be extremely narrow. Also, since the layering profile is sinusoidal instead of squarewave, holographic notch filters are free from extraneous reflection bands and provide significantly higher laser damage thresholds.

Optical Specifications


Notch
Notch-Plus™
SuperNotch®
SuperNotch-Plus™

Laser Attenuation

Optical Density
(Averaged over entire clear aperture)

>4.0
>6.0 >4.0
>6.0
Spectral Bandwidth

Wavenumbers between O.D. 0.3 or 50% transmission points

<700 cm-1 <700 cm-1 <350 cm-1 <350 cm-1
Spectral Edgewidth

Wavenumbers between
O.D. 0.3 and 4.0 points

<300 cm-1 <300 cm-1 <150 cm-1 <150 cm-1
Available
Wavelength Range
350-1400 nm 350-1400 nm 488-1400 nm 488-1400 nm

*Contact Kaiser for specs outside the listed range.

Physical Specifications All Products
Environmental Stability No detectable performance change after cycled between -50ºC to +80ºC and returned to room temperature.
Wavelength Range Standard Wavelengths (nm):
441.6, 457.9, 476.5, 488, 514.4, 532, 568.2, 632.8, 647.1, 752.5, 785, 1064
Custom Wavelengths:
  In the available wavelength range specified in the preceding table.
Sizes Standard Diameters: 1.0, 1.5, 2.0, 2.5 inches
Standard Thicknesses: 0.23 inches nominal
Filter Clear Aperture Active Filter Diameter: External diameter less 0.375 inches

 

AR Specific wavelength range AR coating are available on request.
Wavelength Range

Standard Material: Glass
Optional Material: Fused Silica

Warranty 3 Year

 

Custom Products

Kaiser manufactures all of its filter products at our Ann Arbor facility. Contact Kaiser to talk with an engineer for filter specifications outside the listed ranges.


Product Material
Title
Category
Format
ID#
Holographic Notch Filters
Raman Technical Note
PDF
TN1050

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