Abstract

We reduce the sidelobes that are present in the bandpass zones of rugate filters, using antireflection coatings to design dichroic rugate filters. Our designs are based on the formalism of equivalent systems that allow us to consider a rugate filter a simple equivalent layer with equivalent optical admittance and equivalent phase thickness functions. Rugate filters with apodization were considered.

© 2006 Optical Society of America

Dichroic rugate filters based on birefringent porous silicon

Nobuyuki Ishikura, Minoru Fujii, Kohei Nishida, Shinji Hayashi, and Joachim Diener
Opt. Express 16(20) 15531-15539 (2008)

Rugate filter theory: an overview

Bertrand G. Bovard
Appl. Opt. 32(28) 5427-5442 (1993)

Correlation of sidelobe suppression between rugate filters and multilayer mirrors

Bicher Haj Ibrahim, Roelene Botha, Jean-Eric Bourée, Pavel Bulkin, and Bernard Drévillon
Appl. Opt. 46(31) 7776-7779 (2007)

Flat-topped broadband rugate filters

Anne G. Imenes and David R. McKenzie
Appl. Opt. 45(30) 7841-7850 (2006)

Porous silicon-based rugate filters

Eduardo Lorenzo, Claudio J. Oton, Néstor E. Capuj, Mher Ghulinyan, Daniel Navarro-Urrios, Zeno Gaburro, and Lorenzo Pavesi
Appl. Opt. 44(26) 5415-5421 (2005)