Next Article in Journal
On Combining Static, Dynamic and Interactive Analysis Security Testing Tools to Improve OWASP Top Ten Security Vulnerability Detection in Web Applications
Previous Article in Journal
Model Reference Adaptive Control for Milk Fermentation in Batch Bioreactors
Article

Comparison of Fiber-to-Waveguide Couplers in Point Diffraction Interferometer Based on Waveguide Reference Wavefront Source

State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(24), 9115; https://doi.org/10.3390/app10249115
Received: 24 November 2020 / Revised: 8 December 2020 / Accepted: 17 December 2020 / Published: 20 December 2020
To improve the power of reference wavefront generated by reference wavefront source (RWS) based on silicon nitride (SiN) waveguide in point diffraction interferometer (PDI), we design the Y-branch coupler and grating coupler, and then compare the maximum coupling efficiency, 3 dB fabrication tolerance, 3 dB alignment tolerance and polarization dependent loss of two couplers. Our results show that grating coupler has higher coupling efficiency, lower etching difficulty and alignment difficulty, while Y-branch coupler has lower coating difficulty. To get the maximum efficiency, mode in the fiber must be TE mode no matter for grating coupler or Y-branch coupler. This paper improves the power of the wavefront by selecting appropriate fiber-to-waveguide couplers for waveguide RWS. PDI based on the power improved waveguide RWS is expected to be used in many measurement fields. View Full-Text
Keywords: point diffraction interferometer; reference wavefront source; fiber-to-waveguide coupler point diffraction interferometer; reference wavefront source; fiber-to-waveguide coupler
Show Figures

Figure 1

MDPI and ACS Style

Chen, Y.; Bai, J.; Wang, C.; Xue, Y.; Yang, Y. Comparison of Fiber-to-Waveguide Couplers in Point Diffraction Interferometer Based on Waveguide Reference Wavefront Source. Appl. Sci. 2020, 10, 9115. https://doi.org/10.3390/app10249115

AMA Style

Chen Y, Bai J, Wang C, Xue Y, Yang Y. Comparison of Fiber-to-Waveguide Couplers in Point Diffraction Interferometer Based on Waveguide Reference Wavefront Source. Applied Sciences. 2020; 10(24):9115. https://doi.org/10.3390/app10249115

Chicago/Turabian Style

Chen, Yuankai, Jian Bai, Chen Wang, Yingze Xue, and Yongying Yang. 2020. "Comparison of Fiber-to-Waveguide Couplers in Point Diffraction Interferometer Based on Waveguide Reference Wavefront Source" Applied Sciences 10, no. 24: 9115. https://doi.org/10.3390/app10249115

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop