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Multiport optical circulator by using polarizing beam splitter cubes as spatial walk-off polarizers.
Appl Opt
; 49(8): 1430-3, 2010 Mar 10.
Artigo
em Inglês
| MEDLINE
| ID: mdl-20220900
RESUMO
Optical circulators are necessary passive devices applied in optical communication systems. In the design of optical circulators, the implementation of the function of spatial walk-off polarizers is a key technique that significantly influences the performance and cost of a device. This paper proposes a design of a multiport optical circulator by using polarizing beam splitter cubes as spatial walk-off polarizers. To show the feasibility of the design, a prototype of a six-port optical circulator was fabricated. The insertion losses are 0.94-1.49 dB, the isolations are 25-51 dB, and return losses are 27.72 dB.