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Highly-efficient grating couplers based on transfer-printing technology

Fabio Pavanello (UGent) , Grigorij Muliuk (UGent) and Günther Roelkens (UGent)
Author
Organization
Project
Center for nano- and biophotonics (NB-Photonics)
Abstract
We propose a new approach that allows highly efficient fiber-to-chip coupling using transfer-printing technology. The novelty of the approach relies on the integration of a mirror between a top (source) grating coupler circuit and a bottom (target) photonic integrated circuit (PIC) and on a wide directional coupler to transfer the light between the two waveguide layers before tapering the waveguide to single mode widths. We propose an apodized, partially etched, grating coupler integrated with a directional coupler implemented in amorphous Si, while a crystalline 220nm Silicon-on-Insulator (SOI) platform is used for the target PIC. We achieve a simulated 2D coupling efficiency of 96.2% (-0.17 dB) with a 1 dB bandwidth of 45 nm. The bandwidth takes into account the broadband directional coupler, which is very compact. The alignment tolerance along the direction orthogonal to the light propagation is better than +/- 2 μm to achieve an insertion loss penalty lower than 1 dB, which is well within reach with transfer printing.
Keywords
Silicon photonics, grating couplers, transfer-printing technology

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Citation

Please use this url to cite or link to this publication:

MLA
Pavanello, Fabio, et al. “Highly-Efficient Grating Couplers Based on Transfer-Printing Technology.” Integratred Optics, 21st European Conference, Papers, 2019.
APA
Pavanello, F., Muliuk, G., & Roelkens, G. (2019). Highly-efficient grating couplers based on transfer-printing technology. In Integratred Optics, 21st European conference, Papers. Ghent, Belgium.
Chicago author-date
Pavanello, Fabio, Grigorij Muliuk, and Günther Roelkens. 2019. “Highly-Efficient Grating Couplers Based on Transfer-Printing Technology.” In Integratred Optics, 21st European Conference, Papers.
Chicago author-date (all authors)
Pavanello, Fabio, Grigorij Muliuk, and Günther Roelkens. 2019. “Highly-Efficient Grating Couplers Based on Transfer-Printing Technology.” In Integratred Optics, 21st European Conference, Papers.
Vancouver
1.
Pavanello F, Muliuk G, Roelkens G. Highly-efficient grating couplers based on transfer-printing technology. In: Integratred Optics, 21st European conference, Papers. 2019.
IEEE
[1]
F. Pavanello, G. Muliuk, and G. Roelkens, “Highly-efficient grating couplers based on transfer-printing technology,” in Integratred Optics, 21st European conference, Papers, Ghent, Belgium, 2019.
@inproceedings{8635415,
  abstract     = {We propose a new approach that allows highly efficient fiber-to-chip coupling using transfer-printing technology.
The novelty of the approach relies on the integration of a mirror between a top (source) grating coupler circuit and a bottom (target) photonic integrated circuit (PIC) and on a wide directional coupler to transfer the light between the two waveguide layers before tapering the waveguide to single mode widths. We propose an apodized, partially etched, grating coupler integrated with a directional coupler implemented in amorphous Si, while a crystalline 220nm Silicon-on-Insulator (SOI) platform is used for the target PIC. We achieve a
simulated 2D coupling efficiency of 96.2% (-0.17 dB) with a 1 dB bandwidth of 45 nm. The bandwidth takes into account the broadband directional coupler, which is very compact. The alignment tolerance along the direction orthogonal to the light propagation is better than +/- 2 μm to achieve an insertion loss penalty lower than 1 dB, which is well within reach with transfer printing.},
  articleno    = {paper T.Po2.13},
  author       = {Pavanello, Fabio and Muliuk, Grigorij and Roelkens, Günther},
  booktitle    = {Integratred Optics, 21st European conference, Papers},
  keywords     = {Silicon photonics,grating couplers,transfer-printing technology},
  language     = {eng},
  location     = {Ghent, Belgium},
  pages        = {3},
  title        = {Highly-efficient grating couplers based on transfer-printing technology},
  url          = {https://www.ecio-conference.org/wp-content/uploads/2019/04/Pavanello-Fabio-Highly-efficient-grating-couplers-based-on-transfer-printing-technology.pdf},
  year         = {2019},
}