A5071007466- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Photonic Crystal and Fiber Optics
- Advanced Sensor and Energy Harvesting Materials
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Nanomaterials and Printing Technologies
- Advanced Fiber Laser Technologies
- Electronic Packaging and Soldering Technologies
- Power Line Communications and Noise
- ZnO doping and properties
- Advanced MEMS and NEMS Technologies
- Advanced Fiber Optic Sensors
- Acoustic Wave Resonator Technologies
Aston University
2021-2024
Polytechnic University of Turin
2023
National Institute of Technology Warangal
2018-2020
We report for the first time an ultra-wideband coherent (UWB) WDM transmission over a 70 km standard single mode fibre (SSMF) solely using multistage discrete Raman amplifier (DRA) E-, S-, C- and L-bands of optical window. The is based on split-combine approach spectral bands enabling signal amplification from 1410-1605 nm bandwidth 195 (25.8 THz). proposed was characterized with 143 channelized amplified spontaneous emission (ASE) dummy channels in 4 laser sources E-band (1410-1605 nm)....
We report the transmission of five 30-GBaud dual polarization 16-QAM signals over 160 km standard single-mode fiber in E-band (1410-1460 nm). The line consists two 80-km spans and three independent bismuth-doped amplifiers. developed amplifiers feature a maximum gain 27.3 dB, 33.8 28.3 dB with minimum noise figure 4.8 4.7 5.3 respectively. signal Q2 factor penalty is 4.5 overall performance system above pre-forward-error-correction (FEC) threshold for 10-15 post-FEC bit error rate. To best...
Capacity enhancement by utilising the unused spectral bands of low-loss optical window standard single-mode fibre (SSMF) is a cost-effective solution for meeting future demand data traffic. The development amplifiers that can operate in different expected to play an integral part establishment multi-band networks. In this work, we perform experimental, analytical and numerical modelling transmission system using hybrid distributed-discrete Raman amplifier enabling signal amplification from...
We compare the performance of three optical amplifiers in E-band: a bismuth-doped fiber amplifier (BDFA), distributed Raman amplifier, and discrete (RA). Data transmission 30 GBaud DP-16-QAM DP-64-QAM signals transmitted over 50 km G.652.D is compared terms achieved signal-to-noise (SNR). In this specific case relatively short distance, single-span transmission, BDFA outperforms due to impact nonlinear penalties at high input signal powers.
Ultra-wideband transmission utilizes bandwidths beyond the standard C-band to enable significant network capacity upgrades.Upgrading a C+Lband scenario is already feasible, and exploratory being performed in S-, E-, O-bands investigate quality of (QoT) impairments these spectral regions.In this paper, experimental through SCL-and partial E-band region performed, with use hybrid amplifier that exploits discrete Raman amplification for SCL-bands, bismuth-doped fiber (BDFA) E-band.Through...
We demonstrate a multistage Raman amplifier for 210 nm signal amplification with 15 dB gain and 8.1 maximum noise figure enabling ESCL-band transmission 10 Gb/s NRZ signals over 70 km SMF.
The development of efficient anomaly detection schemes is a key element for the implementation autonomous optical networks as they can help telecom operators to automate location defective devices and track overall performance network infrastructure. In that regard, exploitation receiver based digital signal processing (DSP) monitoring has shown be promising enabler spatially resolved wavelength-dependent properties anomalies in fiber links. this work, we study benefits applying DSP-based...
We demonstrate 50km, 30-Gbaud PM-16QAM transmission with a hybrid distributed- discrete Raman amplifier over 25.8THz bandwidth. E-band distributed amplification shows 0.7dB averaged Q 2 -penalty, versus 1.9dB and 0.9dB due to S-band C+L-band amplification.
A 223 km unrepeated transmission link is experimentally demonstrated using 121 nm optical bandwidth. Optimised bidirectional Raman amplification as well Thulium- and Erbium-doped fibre amplifiers enable a record throughput of 122.62 Tb/s.
We experimentally compare the performance of two key ultra-wideband discrete Raman amplifier structures, a cascaded dual-stage structure and an in-parallel dual-band structure, in fully loaded S-C-L band coherent transmission systems over 70 km single-mode fiber. Our results show that with minimized backreflections can effectively avoid unstable random distributed feedback lasing, reduce noise figure, therefore improve for signals at shorter wavelengths, versus structure. The average figure...
We demonstrate a polarization insensitive fiber optic parametric amplifier to provide net gain >10dB and dependent <1dB for up 19 WDM channels in the range 1508– 1530nm. © 2022 The Author(s)
We review recent advances in the design of wideband Raman amplifiers, describe their experimental performance evaluation coherent transmission systems, and discuss potential applications to optical networks.
The need for transparent conducting electrodes with high transmittance, low sheet resistance and flexibility to replace Indium Tin Oxide is ever growing. We have deposited studied the performance of ultra-thin Cu-Ag-Au tri-layer films over a flexible poly-ethylene terephthalate substrate. Scotch tape test showed good adhesion metallic film. Transmittance was around 40 % in visible region. Optical profiler measurements were done study surface features. XRD pattern revealed that film...
We evaluate the performance penalty due to discrete Raman amplifier (DRA) in a long haul WDM transmission system. The investigation was primarily performed study impact of accumulated nonlinear noise fibre chromatic dispersion and coefficient(γ). Nonlinear fibres such as inverse (IDF), compensation (DCF) development known Corning (CRF) with opposite sign CD other two, were taken gain DRA stage long-haul setup. To these 30 GBaud 120 Gb/s DP-QPSK channel @1550 nm combined 9 spectrally shaped...
We showcase effective strategies to mitigate undesirable pump-to-pump power transfer in wideband Raman amplifiers, encompassing a spectrum of up 210nm, inclusive E, S, C, and L bands.
The accuracy of a recently-developed closed-form GN nonlinear interference model is evaluated in experimental 1065 km S+C+L band WDM transmission with backward Raman pumping. accurately estimates the and ASE total SNR error less than 0.6 dB.
We experimentally compare the performance of S-band amplifiers in a long-haul coherent transmission system using 30 GBaud DP-16QAM signals over up to 1650 km standard single-mode fibre.
We experimentally demonstrate a polarisation-insensitive fibre optic parametric amplifier (PI-FOPA) with the record wide gain bandwidth of 35 nm. employ PI-FOPA to amplify full C- band equivalent 42x100GHz-spaced channels net >10 dB and polarisation-dependent <0.5 in wavelength range between 1580 nm 1615
An indigenous unit is designed to test the stability of thin films deposited on a flexible substrate by inducing required number bending and twisting under specific conditions. The using aluminum automated sending pulse width modulated signals servo motors ATmega328 microcontroller. We have tested imparting stress commercial ITO film PET substrate. After definite cycles, electrical surface properties are studied results discussed.
Relative intensity noise (RIN) induced penalties were experimentally measured in distributed Raman amplifiers (DRAs) for G.654.E and G.652.D fibres with forward, backward bidirectional pumping configurations. The signal RIN using the fibre was ∼3.5 dB ∼2 lower than forward (FW) pump configuration PM-QPSK PM-8QAM signals, single span transmission showing a Q-factor improvement of ∼3 ∼2.5 over fibres. performance penalty long haul coherent system evaluated 28 GBaud signals recirculation loop...
We demonstrate 50km, 30-Gbaud PM-16QAM transmission with a hybrid distributed-discrete Raman amplifier over 25.8THz bandwidth. E-band distributed amplification shows 0.7dB averaged Q <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> -penalty, versus 1.9dB and 0.9dB due to S-band C+L-band discrete amplification.
We report a direct comparison of three different E-band amplifiers: distributed Raman amplifier, discrete and bismuth-doped fibre amplifier. Comparison is made in terms gain, NF, BER performance over 50 km G.652.D fibre.
We experimentally demonstrate 35nm E-band transmission through 60km SSMF using 50Gbaud QPSK signals with Q 2 factor penalties less than 2.75dB enabled by a bismuth doped fiber amplifier 29.8dB gain and 6.25dB noise figure.
We propose a novel hybrid distributed-discrete Raman amplifier extending from 1410–1620 nm, enabling gain bandwidth of 210 nm. Numerical simulation the proposed scheme shows an average 16 dB with maximum noise-figure 6.5 over entire bandwidth.