29 December 2016 Self-collimation Mach–Zehnder interferometer based polarization-independent beam splitter
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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 1 1 and 1 2 is designed and numerically demonstrated, respectively. For the operating wavelength of 1550 nm, the sizes of the PIBS are only 19.7    μ m × 19.7    μ m . With its small dimensions, simple structure, and silicon-based material, this PIBS may have practical applications in photonic-integrated circuits.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Guimin Lin, Xiyao Chen, Ping Fu, "Self-collimation Mach–Zehnder interferometer based polarization-independent beam splitter," Optical Engineering 55(12), 126115 (29 December 2016). https://doi.org/10.1117/1.OE.55.12.126115 . Submission: Received: 1 August 2016; Accepted: 7 December 2016
Received: 1 August 2016; Accepted: 7 December 2016; Published: 29 December 2016
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