We investigate and compare the performance of star-shaped 16-ary quadrature amplitude modulation (Star-16QAM) square-shaped 16QAM (Square-16QAM) in probabilistic shaping (PS) uniform schemes with coherent detection. With help PS technology, bit error ratio (BER) improvement achieved PS-Star-16QAM scheme is greater than that PS-Square-16QAM when compared our numerical simulation experiment. Therefore, shows superiority over terms BER improvement.

Nowadays, Neural network (NN) has been proved to be an effective solution for nonlinear equalization in short reach optical systems. However, recent research mainly focused on implementing more powerful NNs equalization, while ignoring their adaptability tasks. In this paper, we propose Multi-Symbol Output (MSO)-Neural Networks high-speed interconnects. The results show that the proposed MSO design works well Deep (DNN), Long Short-Term Memory neural networks (LSTM) and Gate Recurrent Unit...

We provided a feasible solution for 800-Gb/s per carrier long-distance wavelength division multiplexing (WDM) coherent optical fibre transmission based on offline DSP. experimentally demonstrate 5-carrier 125-GHz-spacing WDM achieving 2000-km distance and net bit rate carrier. utilized 100-Gbaud truncated probabilistically shaped (TPS) polarization-multiplexed 64QAM format in this work. In terms of advanced components, the high-speed digital-to-analog converter with 35-GHz 3 dB-bandwidth...

We propose and experimentally demonstrate a photonics-aided 2 × multiple-input multiple-output (MIMO) wireless Terahertz-wave (THz-wave) signal transmission system, which realizes 6 20-Gb/s six-channel polarization division multiplexing quadrature-phase-shift-keying THz-wave delivery over 10-km wireline single-mode fiber- link 142-cm MIMO with bit-error ratio under the hard-decision forward-error-correction threshold of 3.8 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

We proposed and established a large-capacity, long-distance wireless millimeter-wave (mm-wave) signal delivery system at W-band based on photonics-aided mm-wave generation technology, polarization-division-multiplexing (PDM), advanced devices. demonstrated the transmission of 10-Gbaud PDM-QPSK, PDM-16QAM, PDM-PS-64QAM signals in up to 4.6-km, respectively. The multiple-input multiple-output (MIMO) Volterra equalizer (VE) is employed during Rx offline digital processing (DSP) compensate for...

We experimentally demonstrate 132-Gb/s (12-Gbaud) photonics-aided single-carrier PDM-64QAM-PS5.5 THz-wave signal transmission at 450GHz over 20-km fiber-optics and 1.8-m wireless distance with BER under 4×10−2. The employment of probabilistic-constellation-shaping significantly improves capacity system performance.

We experimentally demonstrated a 10-channel 50-GHz-grid wavelength division multiplexing (WDM) signal transmission over 400-km standard single-mode fiber (SSMF) with the net bit rate of 614.4 Gbps/carrier and spectral efficiency (SE) 12.288 b/s/Hz, which is highest SE for 256QAM to best our knowledge. Thanks joint pre-equalization Volterra nonlinear equalization (VNLE), 49-Gbaud polarization (PDM) 256-ary quadrature amplitude modulation (256QAM) novel constellation using probabilistic...

5G defines below 100 GHz as the millimeter-wave bands, whereas - 3 THz is categorized band in 6G. Deep leraning (DL) expected to enable a significant paradigm shift 6G wireless networks. In this paper, D-band 90-Gbps single channel PAM-4 signal generation and transmission over 10-km SMF 3-m link at 140-GHz can be achieved. A novel complex-valued neural network (CVNN) equalizer using &#x2018;&Copf;ReLU&#x2019; activation function directly recover signals from received noised demonstrated....

Orthogonal frequency division multiplexing (OFDM) is a promising solution in photonics-aided millimeter-wave (MMW) communication systems, which combine the features of fiber and wireless links. In such fiber-wireless system, broadband OFDM signals could be affected by multipath effect, chromatic dispersion, synchronization error, other complex impairments. Therefore, both inter-symbol interference (ISI) inter-carrier (ICI) will cause performance degradation. this experiment, D-band MMW...

The 16QAM signal adopting probabilistic shaping (PS) technology is transmitted in a photonics-aided wireless Terahertz-wave system. experimental results show an improvement of BER performance compared to the uniform distribution.

We experimentally demonstrated single-lane EML-based IM/DD 106-Gbaud PAM-4 and PS-PAM-8 signals transmission over 1-km NZDSF based on Pre-EQ clipping technique. 260-Gb/s signal can be achieved.

The gut microbiota has become an essential component of the host organism and plays a crucial role in immune system, metabolism, physiology. Nevertheless, our comprehension how fish contributes to enhancing nutrient utilization diet improving growth performance remains unclear. In this study, we employed comprehensive analysis microbiome, metabolome, transcriptome analyze intestines normal control group antibiotic-treated model T. ovatus investigate enhances uncover underlying mechanisms....

In this paper, a modified lookup table (LUT) nonlinear predistortion method is proposed. With the LUT method, number of patterns and computational complexity can be reduced by half with similar system performance comparing normal LUT. We experimentally demonstrate an 8-ary pulse amplitude modulation (PAM-8) intensity direct detection (IM/DD) transmission over 15-km fiber using directly modulated laser (DML) based on Around 1-dB receiver sensitivity improvement at bit-error ratio 3.8 × 10...

We experimentally demonstrate the transmission of 100 Gbit/s and beyond vestigial sideband (VSB) n-level pulse amplitude modulation (PAM-n) signals, with a commercial 10 GHz-class directly modulated laser (DML) in C-band, using optical filtering. To mitigate impairments at transmitter side, Nyquist shaping Kaiser Window filtering techniques are used to overcome limited bandwidth optoelectronic devices. At receiver joint nonlinear equalization based on cascaded multi-modulus algorithm (CMMA)...

We experimentally demonstrate the downstream transmission of a 100 Gb/s/λ time division multiplexed passive optical network (TDM-PON) based on four-level pulsed amplitude modulation (PAM-4) in O-band using 10 Gbps transmitters with semiconductor amplifier (SOA) and digital signal processing (DSP) at receiver. Considering soft-decision FEC (SD-FEC) threshold (1 × <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−2</sup> ), power budget 30.3 dB...

Abstract Information security has become a major global problem in recent years. Thus, people continue to exert much effort developing new information technologies based on encryption and storage. In this study, 2D technology polyurethane optical devices with inverse photonic glass structure (PU‐IPG) is introduced. Based 1) the swelling plasticizing effects of various solvents PU‐IPG 2) capillary force that can produce geometric deformation micro/nanostructures when evaporate, system two...

We experimentally demonstrate probabilistically shaped 64-ary quadrature-amplitude-modulation (64QAM) 50-GHz-grid wavelength-division-multiplexing (WDM) transmission with a bit rate of 400-Gbit/s per channel over 3,600-km Raman-amplified ultra-large effective area fiber (ULAF). Our results show that the 64QAM outperforms hybrid-32/64QAM by 50% reach improvement. Thanks to pre-equalization and look-up-table pre-distortion, 5.5-dB optical signal-to-noise ratio (OSNR) gain can be obtained....

We experimentally demonstrated a 5-channel 125-GHz-grid wavelength division multiplexing (WDM) transmission over 6,400-km Raman amplified ultra large effective area fiber (ULAF) with 848-Gbps/carrier line-rate and 640-Gbps/carrier net-bit-rate. Our is based on probabilistically shaped (PS) dual-polarization 16-ary quadrature-amplitude-modulation (16QAM) considering 25%-overhead low-density parity-check threshold of 4.6 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Reservoir computing (RC) is a novel computational framework derived from recurrent neural networks (RNN). It can reduce the training complexity of RNN and suitable for time-series learning tasks. The echo state network (ESN) one most popular forms RC. In this paper, an ESN-based equalizer applied to perform signal equalization in wireless D-band communication system compensate nonlinear distortion. Based on photonics-based technology multiple amplifiers, long-range transmission successfully...

We propose a dual gated recurrent unit neural network based on nonlinear equalizer (dual-GRU NLE) for radio-over-fiber (ROF) communication systems. The equalization scheme is mainly upon GRU algorithm, which can be trained via two steps including I-GRU and Q-GRU. By using the dual-GRU equalizer, 60-Gbps 64-QAM signal generation transmission over 10-km SMF 1.2-m wireless link at 81-GHz achieved. For digital processing (DSP) receiver, comparison between CMMA Volterra are demonstrated. results...

We experimentally built a photonics-aided long-distance large-capacity millimeter-wave wireless transmission system and demonstrated delivery of 40 Gbit/s W-band 16-ary quadrature amplitude modulation (QAM) signal over 4600 m distance at 88.5 GHz. Advanced offline digital processing algorithms are proposed employed for recovery, which makes the bit-error ratio under 2.4×10-2. To best our knowledge, this is first field-trial demonstration >4 km 16QAM transmission, result achieves...