Title :
Multicore Polymer Waveguides and Multistep 45° Mirrors for 3D Photonic Integration
Author :
Ziyang Zhang ; Kleinert, Moritz ; Maese-Novo, Alejandro ; Irmscher, Gelani ; Schwartz, Erik ; Zawadzki, Crispin ; Keil, Norbert
Author_Institution :
Fraunhofer Inst. for Telecommun., Heinrich-Hertz-Inst., Berlin, Germany
Abstract :
Multicore, compact, and low-crosstalk polymer waveguides have been designed, fabricated, and characterized. These single-mode waveguides are arranged in five layers following a hexagonal lattice with 20-(mu ) m pitch. The waveguides exhibit similar propagation loss of <;1 dB/cm (at 1550 nm) without any polarization-dependent effect. The interwaveguide crosstalk remains below -40 dB at 3.8-cm propagation length. A series of multistep 45° mirrors have been introduced to extract light from each of the individual layers. The mirror loss ranges from 1.5 to 1.9 dB, with deep mirrors being gradually more loss-prone due to the free-space beam broadening.
Keywords :
integrated optics; laser beams; mirrors; optical crosstalk; optical design techniques; optical fabrication; optical losses; optical polymers; optical waveguides; 3D photonic Integration; free-space beam broadening; hexagonal lattice; interwaveguide crosstalk; light extraction; loss 1.5 dB to 1.9 dB; low-crosstalk polymer waveguide; multicore polymer waveguides; multistep mirrors; optical propagation loss; single-mode waveguides; size 3.8 cm; wavelength 1550 nm; Loss measurement; Mirrors; Multicore processing; Optical fibers; Photonics; Polymers; 3D photonic integration; Multicore waveguides; optical polymers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2344116
