Open AccessIntegrated polarizer based on 45° tilted gratings
Author(s) -
Matthew T. Posner,
Nina Podoliak,
Devin H. Smith,
Paolo L. Mennea,
Péter Horák,
C.B.E. Gawith,
Peter G. R. Smith,
James C. Gates
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.011174
Subject(s) - polarizer , optics , extinction ratio , materials science , wavelength , planar , polarization (electrochemistry) , refractive index , silicon , optoelectronics , diffraction grating , germanium , birefringence , physics , chemistry , computer graphics (images) , computer science
We report the first integrated implementation of a polarizer based on the use of 45° tilted gratings in planar waveguides. The waveguides and gratings are fabricated by direct UV writing in a hydrogenated germanium-doped silica-on-silicon chip. We experimentally demonstrate a polarization extinction ratio per unit length of 0.25 dB mm -1 with a modelled wavelength dependence smaller than 0.3 dB for a 20 mm device over the C band from 1530-1570 nm. We also present a novel numerical study and analytical description of the architecture that are in good agreement with each other and the experimental data.