Viavi Solutions Inc.
Mixed spacer multispectral filter

Abstract:

An optical filter may include a first mirror, a second mirror, and a spacer layer structure disposed between the first mirror and the second mirror. The spacer layer structure may include a first set of layers. Each layer, of the first set of layers, may be a first material associated with a first refractive index and a thickness that is greater than a layer thickness threshold. The spacer layer structure may include a second set of layers. Each layer, of the second set of layers, may be a second material associated with a second refractive index. Each layer, of the second set of, may be selected to replace a corresponding layer of the first material. The corresponding layer may be associated with a thickness that is less than the layer thickness threshold.