Lasers, Fiber Optics, and Communications

Self-collimation Mach–Zehnder interferometer based polarization-independent beam splitter

[+] Author Affiliations
Guimin Lin

Minjiang University, Department of Physics and Electronic Information Engineering, Xiyuangong Road No. 200, Shangjie Town, Minhou County, Fuzhou 350108, Fujian, China

Fujian Normal University, College of Photonic and Electronic Engineering, Shangsan Road No. 8, Cangshan District, Fuzhou 350007, Fujian, China

Xiyao Chen, Ping Fu

Minjiang University, Department of Physics and Electronic Information Engineering, Xiyuangong Road No. 200, Shangjie Town, Minhou County, Fuzhou 350108, Fujian, China

Opt. Eng. 55(12), 126115 (Dec 29, 2016). doi:10.1117/1.OE.55.12.126115
History: Received August 1, 2016; Accepted December 7, 2016
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Abstract.  A polarization-independent beam splitter (PIBS) based on self-collimation Mach–Zehnder interferometer (SMZI) in a hole-type silicon photonic crystal (PC) is proposed and numerically demonstrated. Utilizing polarization dependence of the transmission spectra of the SMZI and polarization transmission matching method, the SMZI can work as a PIBS by selecting appropriate path length difference in the structure. For a certain operating frequency, the PIBS has the same splitting ratio for both transverse-electric mode and transverse-magnetic mode. In this paper, the PIBS with splitting ratios of 11 and 12 is designed and numerically demonstrated, respectively. For the operating wavelength of 1550 nm, the sizes of the PIBS are only 19.7  μm×19.7  μm. With its small dimensions, simple structure, and silicon-based material, this PIBS may have practical applications in photonic-integrated circuits.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Guimin Lin ; Xiyao Chen and Ping Fu
"Self-collimation Mach–Zehnder interferometer based polarization-independent beam splitter", Opt. Eng. 55(12), 126115 (Dec 29, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.126115


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