Compact integrated star coupler on silicon-on-insulator

Asymmetrical rib waveguide bends on silicon-on-insulator were applied to the design of a compact integrated 39 × 39 star coupler. With bend radius of 500 μm, the effective chip size of the coupler is nearly 1 cm 2 . The average excess loss as low as 1.3 dB was achieved at wavelength 1.55 μm. This be...

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Bibliographic Details
Published in:IEEE photonics technology letters 2005-12, Vol.17 (12), p.2616-2618
Main Authors: Cao, G.B., Dai, L.J., Wang, Y.J., Jiang, J., Yang, H., Zhang, F.
Format: Article
Language:English
Subjects:
Arrayed waveguide gratings
Asymmetry
Bends
Devices
Etching
Finite element method
integrated optics
Joining
Noise levels
Optical coupling
Optical devices
Optical losses
Optical waveguides
Propagation losses
rib waveguide
Silicon on insulator technology
silicon-on-insulator (SOI)
Slabs
star coupler
Star couplers
Waveguides
Wavelengths
Wire
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Summary:Asymmetrical rib waveguide bends on silicon-on-insulator were applied to the design of a compact integrated 39 × 39 star coupler. With bend radius of 500 μm, the effective chip size of the coupler is nearly 1 cm 2 . The average excess loss as low as 1.3 dB was achieved at wavelength 1.55 μm. This bend configuration is not single-mode, but by appropriate design, the fundamental mode propagation can be achieved. It can be used in arrayed waveguide grating devices based on SOI.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2005.859408