A high-performance Echelle grating de-multiplexer based on two stigmatic points and its flat-top solution

Y. Zhang; M. Schneider; D. Karnick; L. Eisenblätter; T. Kühner; M. Weber

doi:10.1117/12.2544694

28 February 2020 A high-performance Echelle grating de-multiplexer based on two stigmatic points and its flat-top solution

Y. Zhang, M. Schneider, D. Karnick, L. Eisenblätter, T. Kühner, M. Weber

Author Affiliations +

Proceedings Volume 11286, Optical Interconnects XX; 112860Y (2020) https://doi.org/10.1117/12.2544694
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

A wavelength filter is a key component for numerous photonic integrated circuit applications in optical communication. Researchers put forward several methods to design wavelength filters for which the Echelle grating de-multiplexers (EGDMUXs) are popular and have been extensively studied. In comparison with the traditional EG-DMUXs based on the Rowland mounting, EG-DMUXs based on the two stigmatic points (TSP) method were reported rather late. This paper will present the basic design theory and a high-performance device fabricated on a 250 nm silicon-on-insulator (SOI) platform for validation. The simulation and measurement results of this 1×7 EG-DMUX with 800 GHz channel spacing will be presented and compared. Although the fabricated device has the merits of compact on-chip footprint, low insertion loss and low crosstalk, its narrow 1-dB bandwidth may limit its application in practice. We present our solution to widen the transmission spectrum based on the TSP EG-DMUXs and multimode interferometers.

Citation Download Citation

Y. Zhang, M. Schneider, D. Karnick, L. Eisenblätter, T. Kühner, and M. Weber "A high-performance Echelle grating de-multiplexer based on two stigmatic points and its flat-top solution", Proc. SPIE 11286, Optical Interconnects XX, 112860Y (28 February 2020); https://doi.org/10.1117/12.2544694

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KEYWORDS

Demultiplexers

Optical design

Optical filters

Diffraction gratings

Reflectors

Waveguides

Interferometers

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