Full-C-band, sub-GHz-resolution Nyquist-filtering (de)interleaver in photonic integrated circuit

Leimeng Zhuang; Chen Zhu; Bill Corcoran; Maurizio Burla; Chris G. H. Roeloffzen; Arne Leinse; Jochen Schröder; Arthur J. Lowery

arXiv · 1509.00564

Full-C-band, sub-GHz-resolution Nyquist-filtering (de)interleaver in photonic integrated circuit

Leimeng Zhuang·Chen Zhu·Bill Corcoran·Maurizio Burla·Chris G. H. Roeloffzen·Arne Leinse·Jochen Schröder·Arthur J. Lowery

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Abstract

Nyquist wavelength division (de)multiplexing (N-WDM) is a highly promising technique for next-generation high-speed elastic networks. In N-WDM, Nyquist filtering is an essential function that governs the channel spectral efficiency. However, most Nyquist filter implementations to date require either expensive, power-hungry digital electronics or complex arrangements of bulky optical components, hindering their adoption for important functions such as Nyquist channel shaping and reconfigurable optical add-drop multiplexers (ROADMs) for Nyquist super-channels. Here, we present a distinctive solution with low-cost, power-efficient, and simple-device natures, which is an on-chip optical Nyquist-filtering (de)interleaver featuring sub-GHz resolution and a near-rectangular passband with 8% transition band. This unprecedented performance is provided by a simple photonic integrated circuit comprising a two-ring-resonator-assisted Mach-Zehnder interferometer, which features high circuit compactness using high-index-contrast Si3N4 waveguide, while showing sub-picosecond optical delay accuracy enabling full C-band coverage with more than 160 effective free spectral ranges of 25 GHz across a bandwidth over 4 THz. Such devices show clear potential for chip-scale realization of N-WDM transceivers and ROADMs.

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Leimeng Zhuang, Chen Zhu, Bill Corcoran, Maurizio Burla, Chris G. H. Roeloffzen, Arne Leinse, Jochen Schröder, Arthur J. Lowery. 2015-09-02. Full-C-band, sub-GHz-resolution Nyquist-filtering (de)interleaver in photonic integrated circuit. https://arxiv.org/abs/1509.00564

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