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10.1364-OE.454163 |
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220510s2022 CNT 000 0 und d |
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|a 10944087 (ISSN)
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|a Reconfigurable and real-time high-bandwidth Nyquist signal detection with low-bandwidth in silicon photonics
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|b Optica Publishing Group (formerly OSA)
|c 2022
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|z View Fulltext in Publisher
|u https://doi.org/10.1364/OE.454163
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|a We demonstrate for the first time, to the best of our knowledge, reconfigurable and real-time orthogonal time-domain detection of a high-bandwidth Nyquist signal with a low-bandwidth silicon photonics Mach-Zehnder modulator based receiver. As the Nyquist signal has a rectangular bandwidth, it can be multiplexed in the wavelength domain without any guardband as a part of a Nyquist-WDM superchannel. These superchannels can be additionally multiplexed in space and polarization. Thus, the presented demonstration can open a new possibility for the detection of multidimensional parallel data signals with silicon photonics. No external pulse source is needed for the receiver, and frequency-time coherence is used to sample the incoming Nyquist signal with orthogonal sinc-shaped Nyquist pulse sequences. All parameters are completely tunable in the electrical domain. The feasibility of the scheme is demonstrated through a proof-of-concept experiment over the entire C-band (1530 nm-1560 nm), employing a 24 Gbaud Nyquist QPSK signal due to experimental constraints on the transmitter side electronics. However, the silicon Mach-Zehnder modulator with a 3-dB bandwidth of only 16 GHz can process Nyquist signals of 90 GHz optical bandwidth, suggesting a possibility to detect symbol rates up to 90 GBd in an integrated Nyquist receiver. © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement Journal © 2022
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|a Bandwidth
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|a Domain detections
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|a High bandwidth
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|a Light modulation
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|a Light modulators
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|a Low-bandwidth
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|a Mach Zehnder modulator
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|a Nyquist
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|a Photonic devices
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|a Real- time
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|a Reconfigurable
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|a Signal detection
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|a Signal receivers
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|a Signal's detections
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|a Silicon photonics
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|a Superchannel
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|a Time domain
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|a Kress, C.
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|a Meier, J.
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|a Misra, A.
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|a Preussler, S.
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|a Scheytt, J.C.
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|a Schneider, T.
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|a Schwabe, T.
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|a Singh, K.
|e author
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| 773 |
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|t Optics Express
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