Experimental Demonstration of a WDM-RoF Based Mobile Fronthaul With f-OFDM Signals by Using Directly Modulated 3s-DBR Laser

Zhu, Yao; Wu, Yuze; Xu, Haixuan; Browning, Colm; Barry, Liam P.; Yu, Yonglin

doi:10.1109/jlt.2019.2923245

Cited by 33 publications

(6 citation statements)

References 34 publications

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“…ROF thus avoids expensive antennas, is not subject to losses of microwave waveguides or free-space propagation, and can provide access to areas where radio links might otherwise be infeasible. Specifically, wavelength-division multiplexed (WDM) systems can be used [14] to maximally exploit the optical bandwidth of fiber. Such WDM ROF systems clearly benefit from microwave-modulated optical sources that can be tuned to the center microwave frequency of the relevant bands.…”

Section: Introductionmentioning

confidence: 99%

Staircase Dynamics of a Photonic Microwave Oscillator Based on a Laser Diode with Delayed Optoelectronic Feedback

et al. 2020

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A laser diode subjected to optoelectronic feedback in which some light is converted to photocurrent that is fed back into the laser injection terminals can display periodic oscillations in its optical intensity. We demonstrate experimental and numerical evidence that, as the feedback level is varied, a stepwise change in the oscillation frequency manifests itself in the output optical intensity. These transitions in the dynamics can either correspond to an abrupt jump between two limit cycles, associated with a subcritical torus bifurcation of a limit cycle, or to a progressive switching mediated by an intermediate quasiperiodic state. Finally, when ramping the feedback level down, hysteresis is observed in the sequence of switching events between the limit cycles. Such devices are of interest for photonic microwave sources for wavelength-division multiplexed radio-over-fiber systems.

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Section: Introductionmentioning

confidence: 99%

Staircase Dynamics of a Photonic Microwave Oscillator Based on a Laser Diode with Delayed Optoelectronic Feedback

et al. 2020

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“…Hence, directly modulated laser can be used for reducing the effect of nonlinearity. A 10-wavelength WDM-based A-RoF system has successfully transmitted both 16-and 64-QAM symbols over a 20-km fiber at a bandwidth of 2.5 GHz per wavelength [15]. As a further development, the optimal RF power and optical power was found in [5] by analysing the externally modulated laser's nonlinear curve, which facilitated reliable transmission by using a bandwidth of 2 GHz per wavelength over 20-km length of fiber [5].…”

Section: A Current Statusmentioning

confidence: 99%

Analogue Radio Over Fiber for Next-Generation RAN: Challenges and Opportunities

Xie²,

El‐Hajjar

et al. 2021

Preprint

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The radio access network (RAN) connects the users to the core networks, where typically digitised radio over fiber (D-RoF) links are employed. The data rate of the RAN is limited by the hardware constraints of the D-RoF-based backhaul and fronthaul. In order to break this bottleneck, the potential of the analogue radio over fiber (A-RoF) based RAN techniques are critically appraised for employment in the next-generation systems, where increased-rate massive multipleinput-multiple-output (massive-MIMO) and millimeter wave (mmWave) techniques will be implemented. We demonstrate that huge bandwidth and power-consumption cost benefits may accrue upon using A-RoF for next-generation RANs. We provide an overview of the recent A-RoF research and a performance comparison of A-RoF and D-RoF, concluding with further insights on the future potential of A-RoF.Index terms Optical fiber, radio access network, digitised radio over fiber, analogue radio over fiber, MIMO.

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“…The system response shows notches at 4.1 GHz due to the transient chirp. The adiabatic chirp has an impact on the channel response since the frequency notches caused by the adiabatic chirp are compensated by the transient chirp [5]. Fig.…”

Section: Theoretical Simulationsmentioning

confidence: 99%

“…Conventional MFHs have employed the digital fiber-optic interfaces such as common public radio interface (CPRI), but 5G networks traffic would exceed hundreds of Gb/s [3] and further functions splitting is required in the enhanced CPRI (eCPRI) interface [4]. However, analog radio-over-fiber (RoF) approach combined with optical distribution network (ODN) technology offers a scalable and flexible solution with increased spectral efficiency and transmission capacity by using transceivers with a bandwidth of a few Gb/s [5,6]. Moreover, the spectral congestion of lower microwave spectral region is the motivation for exploiting higher frequency bands [7,8,9,10], i.e.…”

Section: Introductionmentioning

confidence: 99%

Usability of a 5G Fronthaul Based on a DML and External Modulation for M-QAM Transmission Over Photonically Generated 40 GHz

et al. 2020

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Experimental Demonstration of a WDM-RoF Based Mobile Fronthaul With f-OFDM Signals by Using Directly Modulated 3s-DBR Laser

Cited by 33 publications

References 34 publications

Staircase Dynamics of a Photonic Microwave Oscillator Based on a Laser Diode with Delayed Optoelectronic Feedback

Staircase Dynamics of a Photonic Microwave Oscillator Based on a Laser Diode with Delayed Optoelectronic Feedback

Analogue Radio Over Fiber for Next-Generation RAN: Challenges and Opportunities

Usability of a 5G Fronthaul Based on a DML and External Modulation for M-QAM Transmission Over Photonically Generated 40 GHz

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