Portal de Periódicos da CAPES

Flat-topped broadband rugate filters

2006; Optica Publishing Group; Volume: 45; Issue: 30 Linguagem: Inglês

10.1364/ao.45.007841

0003-6935

Anne Gerd Imenes, David R. McKenzie,

Photonic and Optical Devices

A method of creating rugate interference filters that have flat-topped reflectance across an extended spectral region is presented. The method applies known relations from the classical coupled wave theory to develop a set of equations that gives the spatial frequency distribution of rugate cycles to achieve constant reflectance across a given spectral region. Two examples of the application of this method are discussed: a highly reflective coating for eye protection against harmful laser radiation incident from normal to 45 degrees , and a spectral beam splitter for efficient solar power conversion.