Thin-film beam splitter for integrated optics
1977; Optica Publishing Group; Volume: 67; Issue: 4 Linguagem: Inglês
10.1364/josa.67.000533
ISSN2375-1037
AutoresVincent Denis, John W. Y. Lit,
Tópico(s)Photonic and Optical Devices
ResumoA simple thin-film beam splitter has been made by sputtering techniques. The device is similar in principle to beam splitters in bulk optics based on frustrated total reflection. It depends on a slow variation of guide thickness that permits the existence of an evanescent wave by which light is transferred from one side of the beam splitter to the other. The tunneling region has a variable index profile and there are no discontinuities. Fabrication techniques, theory, and experimental results are presented.
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