title: Multiport optical circulator by using polarizing beam splitter cubes as spatial walk-off polarizers.
abstract: 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.
authors.affiliation: Department of Photonics, Feng Chia University, 100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan. jhchen@fcu.edu.tw
authors.forename: Jing-Heng
authors.initials: JH
authors.lastname: Chen
authors.forename: Kun-Huang
authors.initials: KH
authors.lastname: Chen
authors.forename: Jiun-You
authors.initials: JY
authors.lastname: Lin
authors.forename: Hsiang-Yung
authors.initials: HY
authors.lastname: Hsieh