Filterless and Compact ANy-WDM Transmission System Based on Cascaded Ring Modulators

Hosni, Mohamed I.; Singh, Karanveer; Mandalawi, Younus; Meier, Janosch; Mokhtar, Ayman M.; Schneider, Thomas

doi:10.1109/access.2022.3222316

Cited by 7 publications

(4 citation statements)

References 36 publications

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“…Given that an ideal rectangular filter is available and the filtered slice is measured with an ADC with a bandwidth of 12 GHz, its ENOB and SINAD would be lower than by the detection with our method. In [30] it was demonstrated, for instance, that detecting a 24 GBd (24 GHz) signal with 4 GHz ADC in three branches shows a Q-factor improvement of 2.2 dB. This improved quality of the detected signal may result in a lower requirement for power consumption in any following signal processing.…”

Section: Discussionmentioning

confidence: 99%

Filterless Reception of Terabit, Faster Than Nyquist Superchannels With 4 GHz Electronics

Venugopalan,

Mandal,

Meier

et al. 2024

J. Lightwave Technol.

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Data transmission speeds in excess of 1 Terabit per second (Tbit/s) are predicted with the evolving needs of modern applications, ranging from new communication technologies to data intensive computing and emerging paradigms like internetof-things and augmented reality. The bandwidth limitation of current electronics, however, may represent a critical challenge in achieving such high data rates. Here, we experimentally demonstrate how, with the help of photonics, a single faster than Nyquist (FTN) superchannel with a 3-dB bandwidth of 662.5 GHz and a data rate in excess of 1 Tbit/s can be detected and processed with just 4 GHz electronics. The method does not need any kind of filter, optical delay line, pulse source, electronic post processing or other sophisticated electronic or photonic equipment. It is simply based on orthogonal sampling in a Mach-Zehnder modulator (MZM) by sinc-pulse sequences.Therefore, it has the potential to be integrated into any photonic platform. The presented approach may be a straight-forward solution to meet the demands of future terabit communication and measurement systems with cost-effective, integrated devices.

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Section: Discussionmentioning

confidence: 99%

Filterless Reception of Terabit, Faster Than Nyquist Superchannels With 4 GHz Electronics

Venugopalan,

Mandal,

Meier

et al. 2024

J. Lightwave Technol.

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“…The simplest sinc pulse sequence is just a single sinusoidal radio frequency (RF) with a constant direct current (DC) offset, or bias [14]. To achieve orthogonality, the sinc pulse sequences in the branches need to be time shifted with respect to each other [15], [16]. This can be achieved by adjusting the phase change of the RF by Δ𝜙 = 360ᵒ/3 = 120ᵒ between the branches.…”

Section: Concept Of the Proposed Methodsmentioning

confidence: 99%

Photonics-assisted high-bandwidth, high spectral efficiency signal aggregation from low-bandwidth components and lower spectral efficient signals

Hosni,

Mandalawi,

Meier

et al. 2024

Integrated Photonics Platforms III

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We present a new concept for generating wideband signals of higher spectral efficiency from signals of low-bandwidth and lower efficiency. With pure electronics, we are able to generate broad-bandwidth signals with low-modulation format from low-bandwidth sub-DACs. This is based on electrical orthogonal sampling with sinc-pulse sequences in N parallel branches. In photonics, a higher spectral efficiency can be achieved from M branches at different optical powers. The proposed method can be integrated into any silicon platform and might be of great interest for bandwidth, and data hungry applications.

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“…To get the whole information from the signal, in each of the p branches, the same signal is sampled with the same sampling rate but, at a different sampling time. The adjustment of the sampling time is achieved by a phase shift of the RF frequencies between the branches of φ = 2π/p [21], [22], [23].…”

Section: Principle Of Operationmentioning

confidence: 99%

Low-Bandwidth Photonics-Assisted Receiver for Broad-Bandwidth Wireless Signals

et al. 2023

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This paper introduces a photonics-assisted receiver that enables the reception of high-bandwidth wireless signals with low-bandwidth electronics. The receiver down-converts the input signal into parallel low-bandwidth sub-signals, employing photonics-based orthogonal sampling. This sampling is based on a multiplication and not switching, so, it does not introduce additional aperture jitter. Therefore, the photonics-assisted analog-to-digital converter (ADC) converts the wireless signal with a higher signal-to-noise-and-distortion ratio (SINAD), which improves the Q-factor for the detection. This Q-factor improvement is especially high, when the orthogonal sampling is carried out with low-jitter oscillators. Compared to the direct detection with 30 GHz, the simulation demonstrates a 2.2 dB Q-factor enhancement for the detection of a 30 GHz signal, with 10 GHz electronics. The same improvement is revealed in the experiment for the detection of 12 GHz signals with 4 GHz electronics.

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Filterless and Compact ANy-WDM Transmission System Based on Cascaded Ring Modulators

Cited by 7 publications

References 36 publications

Filterless Reception of Terabit, Faster Than Nyquist Superchannels With 4 GHz Electronics

Filterless Reception of Terabit, Faster Than Nyquist Superchannels With 4 GHz Electronics

Photonics-assisted high-bandwidth, high spectral efficiency signal aggregation from low-bandwidth components and lower spectral efficient signals

Low-Bandwidth Photonics-Assisted Receiver for Broad-Bandwidth Wireless Signals

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