2017/11/07 by Logan Su, Rahul Trivedi, Neil V. Sapra +3 · 1 citation
Physics and Astronomy · #physics.app-ph #physics.optics
paper · pdf · doi:10.1364/oe.26.004023
8 pages, 7 figures
arxiv created 2017/11/07 · arxiv updated 2018/03/14
We present a gradient-based algorithm to design general 1D grating couplers without any human input from start to finish, including a choice of initial condition. We show that we can reliably design efficient couplers to have multiple functionalities in different geometries, including conventional couplers for single-polarization and single-wavelength operation, polarization-insensitive couplers, and wavelength-demultiplexing couplers. In particular, we design a fiber-to-chip blazed grating with under 0.2 dB insertion loss that requires a single etch to fabricate and no back-reflector.