We manufacture Gaussian Mirrors (Graded Reflective Mirrors) in two parts; the substrate and the coatings.

Gausian mirror selection

Substrate

Material: We typically use Fused Silica or BK7 as the substrate material (the majority of what we have manufactured has used Fused Silica).

Diameter: We need to know the diameter with a tolerance. We have manufactured up to 1″ diameter. In order to minimize tooling costs, we have tooling available for 1″, .5″, and 15mm.

Center Thickness: (up to 1/4″ typically).

Wedge: Typically .5 degree up to 5 degrees.

Radius: Side 1 and Side 2 with tolerances (We typically put the Gaussian curve on side 1 with surface accuracy of 1/4 wave).

Scratch and Dig: 10-5 or better for the beam diameter. 60-40 or better outside the beam diameter.

Chamfer: Typically (.020 x 45 degrees).

Clients can either supply the substrates to us, or have us manufacture them. If you supply the substrates, we would need to know what their characteristics are, and they would need to be uncoated. (No A/R Coating.) Our coating fixture can handle up to a 1″ diameter parts.

*Note, if you supply the substrates, we will not be held responsible for replacing them if they are damaged during coating.

Coatings

Antireflection Coating: Side 2 and around the Gaussian Spot (background) on Side 1.

Gaussian Spot Specifications for side 1 are as follows:

Equation

f(r) = R * exp [-2 * (r / w) ^ n]

*This is not set in stone. If you have a different equation, we would need it.

Where

r = radius from the center of the Gaussian reflector.

R = peak reflectivity, when r = 0 (We routinely produce up to 35%. We have experimented up to 60%).

w = (radius in millimeters) waist or 1/e^2 point. (This is the point at which the reflectivity is the peak reflectivity * 1/e ^2).

n = Gaussian order (Typically 2) for single mode lasers, multimode (super Gaussian) can be up to 6 Beam Diameters.