首页|Ultra-compact multichannel optical waveguide crossings designed by a particle swarm optimized method
Ultra-compact multichannel optical waveguide crossings designed by a particle swarm optimized method
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NSTL
Elsevier
Ultra-compact multichannel optical waveguide crossings are designed by a particle swarm optimized inverse design method. The 2 x 2 TE (TM) device has an ultra-small footprint of 2 x 2 mu m(2) and exhibits a high transmission efficiency of 69.1% (89.7%) and low crosstalk of -34.4 dB (-84.8 dB) at 1550 nm. The devices can work within a large range of pixel size and waveguide width, suggesting high process tolerance of the design method. To further extend the functionality, a 3 x 3 device with the same size is designed, which exhibits a remarkable transmission efficiency of 47.6%, 61.8%, 67.2%, and low crosstalk of -33.3 dB, -39.2 dB, and -49.9 dB, respectively, for the three transmission paths. In addition, by adjusting the structure, other types of 3 x 3 devices with different transmission paths are demonstrated. The ultra-compact broad-bandwidth high-process-tolerance optical waveguide crossings have great potential in high-integration photonic-integrated circuits.
NSTL
Elsevier
