Abstract
Increasing demands for data centers, backbone, access, and wireless networks require inventive concepts to transmit and distribute digital or analog signal waveforms. We present a new, extremely simple transceiver concept, fundamentally different from conventional approaches. It does not rely on high-speed electronics and enables transmission of various time multiplexed analog waveforms or digital data signals with the maximum possible symbol rate in the same rectangular optical spectral band B. The aggregate symbol rate of N signal channels corresponds to B or twice the used modulator's electro-optical bandwidth. By a modification of the system, it can be increased to three times the modulator bandwidth. The rectangular spectra can be further multiplexed into wavelength-superchannels without guardbands. To time demultiplex single signal channel, just another intensity modulator and a detector with an electrical bandwidth corresponding to the channel's baseband width (B/(2N)) is required. No optical filter, high-speed signal processing, or unconventional photonic devices are needed; thus, it has the potential to be easily integrated into any platform and provides an economical and energy-efficient solution for future communication networks and microwave photonic links.
Highlights
According to Cisco’s annual internet report [1], 66% of the eight billion-world population in 2023 will be connected to the internet
To experimentally demonstrate the underlying concept of the agnostic sampling transceiver, we adopted a proof of concept experimental setup with off-the-shelf telecom equipment similar to that shown in Fig. 1
Since the radio frequency (RF) equipment was not available for the proof of concept setup, it was mimicked by Matlab code and an arbitrary waveform generator (AWG)
Summary
According to Cisco’s annual internet report [1], 66% of the eight billion-world population in 2023 will be connected to the internet. As a proof of concept, we have experimentally demonstrated for the first time in our knowledge that, different kinds of time multiplexed analog waveforms and digital data signals of versatile complex modulation formats occupying the same rectangular spectral band, can be transmitted, time demultiplexed, and received error-free with low bandwidth standard telecommunication devices at a theoretically maximum spectral efficiency. Due to its simplicity and the possibility to achieve high data rates with low bandwidth electronics and photonics and without massive signal processing, full integration into any electronics-photonics platform is straightforward This proposed agnostic transceiver will provide a way to keep pace with the increasing demand and complexity of tomorrow’s communication networks. As it can transmit and receive any signal waveform within a specific theoretically defined bandwidth, it will be beneficial to the microwave photonics links
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