Title :
Efficient Polarization Diversity Grating Couplers in Bonded InP-Membrane
Author :
Van Laere, Frederik ; Stomeo, Tiziana ; Taillaert, Dirk ; Roelkens, Günther ; Van Thourhout, Dries ; Krauss, Thomas F. ; Baets, Roel
Author_Institution :
Dept. of inf. Technol., Ghent Univ., Ghent, Belgium
Abstract :
We report on the design, fabrication, and measurement of compact and efficient grating couplers between fiber and nanophotonic waveguides, in a polarization diversity configuration. This approach allows for polarization-independent integrated circuits. The gratings and waveguides are fabricated in a benzocyclobutene (BCB)-bonded InP-membrane, with high vertical refractive index contrast. The coupling loss of the gratings is 3.3 dB and the measured polarization-dependent loss is 0.79 dB.
Keywords :
diffraction gratings; integrated optics; optical design techniques; optical fabrication; optical fibre couplers; optical fibre losses; refractive index; InP; benzocyclobutene-bonded membrane; coupling loss; fiber-to-fiber loss; grating coupler; loss -3.3 dB; loss 0.79 dB; nanophotonic waveguides; polarization diversity grating couplers; polarization-dependent loss; polarization-independent integrated circuits; vertical refractive index contrast; Bonding; Fiber gratings; Integrated circuit measurements; Optical coupling; Optical fiber couplers; Optical fiber polarization; Optical fibers; Optical losses; Optical waveguides; Refractive index; Benzocyclobutene (BCB); InP-membrane; grating couplers; polarization diversity;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.915587
