Wide-band two-port polarization-independent beam splitter based on an encapsulated transmission grating

Yunkai Lu; Changhe Zhou; Junjie Yu

doi:10.1117/12.2500957

6 November 2018 Wide-band two-port polarization-independent beam splitter based on an encapsulated transmission grating

Yunkai Lu, Changhe Zhou, Junjie Yu

Proceedings Volume 10818, Holography, Diffractive Optics, and Applications VIII; 1081811 (2018) https://doi.org/10.1117/12.2500957
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

A wide-band two-port polarization-independent beam splitter is designed and analyzed at the incident wavelength of 1550nm. Diffraction efficiencies are 49.67%/49.57% and 48.69%/48.88% for TE and TM polarizations in the 0th and the -1st, respectively. Usually, it’s difficult for two-port beam splitter to achieve wide bandwidth for both polarizations. In this paper, the presented grating has advantages of wide incident wavelength range of 110nm and angular bandwidth of 8.8° with good splitting ratio uniformity for both polarizations, particularly TE polarization. Moreover, the aspect ratio of the grating depth to the ridge width is low, which can be etched relatively easily and effectively. This wide-band splitter should be highly interesting for practical applications.

Citation Download Citation

Yunkai Lu, Changhe Zhou, and Junjie Yu "Wide-band two-port polarization-independent beam splitter based on an encapsulated transmission grating", Proc. SPIE 10818, Holography, Diffractive Optics, and Applications VIII, 1081811 (6 November 2018); https://doi.org/10.1117/12.2500957

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