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Authors: W. Bogaerts, S. Pathak, A. Ruocco, S. Dwivedi, P. De Heyn, P. Dumon, D. Van Thourhout, J. Van Campenhout, P. Absil
Title: Silicon photonics non-resonant wavelength filters: comparison between AWGs, echelle gratings and cascaded Mach-Zehnder filters.
Format: International Conference Proceedings
Publication date: 2/2015
Journal/Conference/Book: Proc. SPIE 9365, Integrated Optics: Devices, Materials, and Technologies XIX (invited)
Editor/Publisher: SPIE, 
Volume(Issue): p.93650H
Location: San Francisco, United States
DOI: 10.1117/12.2082785
Citations: 11 ( - last update: 14/7/2024)
4 (OpenCitations - last update: 27/6/2024)
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We present a comparison of different silicon photonics-based wavelength filters targeted at different applications with different requirements (e.g. channel spacing, number of channels, insertion loss or crosstalk level). In this paper we compare only non-resonant filters, or finite-impulse response (FIR) filters, such as Arrayed Waveguide Gratings, Echelle Gratings and higher-order cascades of Mach-Zehnder filters. We derive the strengths and weaknesses from their operational principles and confirm those with experimental data from fabricated devices. We will then discuss the applicability of the different filter devices for applications in WDM communication, sensing and spectroscopy.

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