RT Journal Article
T1 Dual-Band Polarization-Independent Subwavelength Grating Coupler for Wavelength Demultiplexing.
A1 Hao, Tianyi
A1 Sánchez-Postigo, Alejandro
A1 Cheben, Pavel
A1 Ortega-Moñux, Alejandro
A1 Ye, Winnie N.
K1 Multiplexores
K1 Comunicaciones ópticas
AB Surface grating couplers are diffractive periodic structures that enable efficient coupling of light between optical fibers and planar waveguides. Conventional grating couplers have polarization specific and limited wavelength operation, because of the intrinsic radiation angle dependency on both wavelength and polarization. In this Letter, we propose, to the best of our knowledge, the first polarization-independent surface fiber-chip grating coupler, behaving as a wavelength splitter for the O and C communication bands. Polarization insensitivity is achieved by subwavelength segmentation of the silicon gratings, together with a novel design to allow the dual wavelengths to propagate along two opposite directions in the chip. For the TE and TM polarizations, coupling efficiencies around -4.5 dB are achieved at both 1310 nm and 1550 nm, with an average 1-dB bandwidth of ~45 nm and ~60 nm, respectively. This grating coupler concept can be used as a part of transceivers to increase the data rate of wavelength-division-multiplexing (WDM) systems for fiber-to-the-home (FTTH) network services.
PB IEEE
YR 2020
FD 2020-08-06
LK https://hdl.handle.net/10630/32820
UL https://hdl.handle.net/10630/32820
LA eng
NO T. Hao, A. Sánchez-Postigo, P. Cheben, A. Ortega-Moñux and W. N. Ye, "Dual-Band Polarization-Independent Subwavelength Grating Coupler for Wavelength Demultiplexing," in IEEE Photonics Technology Letters, vol. 32, no. 18, pp. 1163-1166, 15 Sept.15, 2020, doi: 10.1109/LPT.2020.3014640. keywords: {Gratings;Couplers;Optical polarization;Optical waveguides;Indexes;Optical coupling;Dual band;Grating coupler;dual-band;polarization independent;wavelength-division-multiplexing},
NO Política de acceso abierto tomada de: https://v2.sherpa.ac.uk/id/publication/3539
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026