Eight-Channel Silicon-Photonic Wavelength Division Multiplexer with 17 GHz Spacing

Dvir Munk; Moshe Katzman; Yuri Kaganovskii; Naor Inbar; Arijit Misra; Mirit Hen; Maayan Priel; Moshe Feldberg; Maria Tkachev; Arik Bergman; Menachem Vofsi; Michael Rosenbluh; Thomas Schneider; Avi Zadok

doi:10.1109/JSTQE.2019.2904437

Eight-Channel Silicon-Photonic Wavelength Division Multiplexer with 17 GHz Spacing

Dvir Munk, Moshe Katzman, Yuri Kaganovskii, Naor Inbar, Arijit Misra, Mirit Hen, Maayan Priel, Moshe Feldberg, Maria Tkachev, Arik Bergman, Menachem Vofsi, Michael Rosenbluh, Thomas Schneider, Avi Zadok

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Abstract

Dense wavelength division multiplexers are key components of data communication networks. This paper presents a silicon-photonic eight-channel multiplexer device with a channel spacing of only 0.133 nm (17 GHz). Devices were fabricated in a commercial silicon foundry, in 8» silicon-on-insulator wafers. The device layout consists of seven unbalanced Mach-Zehnder interferometers in a cascaded tree topology, and each interferometer unit also includes a nested ring resonator element. The transfer function of each unit is that of a maximally flat, auto-regressive, moving-average filter. The devices are characterized by uniform passbands, sharp spectral transitions between pass and stop bands, and strong out-of-band rejection. The worst-case optical power crosstalk is -22 dB. The proper function of the device requires careful control of optical phase delays over 14 distinct optical paths. Post-fabrication trimming of phase delays was performed through local illumination of a photo-sensitive upper cladding layer of chalcogenide glass. The de-multiplexing of three adjacent QAM-16, 40 Gbit/s wavelength-division channels was successfully demonstrated. The devices are applicable in data communication and in integrated-photonic processing of radio-over-fiber waveforms.

Original language	English
Article number	8664601
Journal	IEEE Journal of Selected Topics in Quantum Electronics
Volume	25
Issue number	5
DOIs	https://doi.org/10.1109/JSTQE.2019.2904437
State	Published - 1 Sep 2019

Bibliographical note

Publisher Copyright:
© 1995-2012 IEEE.

Funding

Dr. Hen was the recipient of the Academia-Industry Fellowship for the Promotion of Women in Science from the Israeli Ministry of Science, Technology, and Space in 2017. Manuscript received November 5, 2018; revised January 5, 2019; accepted March 5, 2019. Date of publication March 11, 2019; date of current version April 18, 2019. This work was supported in part by the Israel Science Foundation under Grant 1665/14, in part by the Israel Innovation Authority through PETA CLOUD Consortium, MAGNET Program, and in part by Ministry of Science and Culture (MWK) of Lower Saxony, Germany (GZ 21.1-76251-87150700). (Corresponding author: Avi Zadok).

Funders	Funder number
Israel Innovation Authority
Israeli Ministry of Science, Technology, and Space
Ministry of Science and Culture
Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg	GZ 21.1-76251-87150700
Israel Science Foundation	1665/14

Keywords

Silicon photonics
chalcogenide glasses
data communication
optical communication
optical filters
photonic integrated circuits
wavelength division multiplexing

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10.1109/JSTQE.2019.2904437

Cite this

Munk, D., Katzman, M., Kaganovskii, Y., Inbar, N., Misra, A., Hen, M., Priel, M., Feldberg, M., Tkachev, M., Bergman, A., Vofsi, M., Rosenbluh, M., Schneider, T., & Zadok, A. (2019). Eight-Channel Silicon-Photonic Wavelength Division Multiplexer with 17 GHz Spacing. IEEE Journal of Selected Topics in Quantum Electronics, 25(5), Article 8664601. https://doi.org/10.1109/JSTQE.2019.2904437

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abstract = "Dense wavelength division multiplexers are key components of data communication networks. This paper presents a silicon-photonic eight-channel multiplexer device with a channel spacing of only 0.133 nm (17 GHz). Devices were fabricated in a commercial silicon foundry, in 8» silicon-on-insulator wafers. The device layout consists of seven unbalanced Mach-Zehnder interferometers in a cascaded tree topology, and each interferometer unit also includes a nested ring resonator element. The transfer function of each unit is that of a maximally flat, auto-regressive, moving-average filter. The devices are characterized by uniform passbands, sharp spectral transitions between pass and stop bands, and strong out-of-band rejection. The worst-case optical power crosstalk is -22 dB. The proper function of the device requires careful control of optical phase delays over 14 distinct optical paths. Post-fabrication trimming of phase delays was performed through local illumination of a photo-sensitive upper cladding layer of chalcogenide glass. The de-multiplexing of three adjacent QAM-16, 40 Gbit/s wavelength-division channels was successfully demonstrated. The devices are applicable in data communication and in integrated-photonic processing of radio-over-fiber waveforms.",

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Munk, D, Katzman, M, Kaganovskii, Y, Inbar, N, Misra, A, Hen, M, Priel, M, Feldberg, M, Tkachev, M, Bergman, A, Vofsi, M, Rosenbluh, M, Schneider, T & Zadok, A 2019, 'Eight-Channel Silicon-Photonic Wavelength Division Multiplexer with 17 GHz Spacing', IEEE Journal of Selected Topics in Quantum Electronics, vol. 25, no. 5, 8664601. https://doi.org/10.1109/JSTQE.2019.2904437

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AU - Munk, Dvir

AU - Katzman, Moshe

AU - Kaganovskii, Yuri

AU - Inbar, Naor

AU - Misra, Arijit

AU - Hen, Mirit

AU - Priel, Maayan

AU - Feldberg, Moshe

AU - Tkachev, Maria

AU - Bergman, Arik

AU - Vofsi, Menachem

AU - Rosenbluh, Michael

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AU - Zadok, Avi

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Eight-Channel Silicon-Photonic Wavelength Division Multiplexer with 17 GHz Spacing

Abstract

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Keywords

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