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Proceedings Paper

A high-performance Echelle grating de-multiplexer based on two stigmatic points and its flat-top solution
Author(s): Y. Zhang; M. Schneider; D. Karnick; L. Eisenblätter; T. Kühner; M. Weber
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Paper 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.

Paper Details

Date Published: 28 February 2020
PDF: 7 pages
Proc. SPIE 11286, Optical Interconnects XX, 112860Y (28 February 2020); doi: 10.1117/12.2544694
Show Author Affiliations
Y. Zhang, Karlsruhe Institute of Technology (Germany)
M. Schneider, Karlsruhe Institute of Technology (Germany)
D. Karnick, Karlsruhe Institute of Technology (Germany)
L. Eisenblätter, Karlsruhe Institute of Technology (Germany)
T. Kühner, Karlsruhe Institute of Technology (Germany)
M. Weber, Karlsruhe Institute of Technology (Germany)

Published in SPIE Proceedings Vol. 11286:
Optical Interconnects XX
Henning Schröder; Ray T. Chen, Editor(s)

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