Optimum Mitigation of distortion induced by Rayleigh Backscattering in Radio-over-Fiber links for the Square Kilometer Array Radio-Telescope

Nanni, Jacopo; Giovannini, Andrea; Hadi, Muhammad Usman; Rusticelli, Simone; Perini, Federico; Monari, Jader; Lenzi, Enrico; Tartarini, Giovanni

doi:10.1109/mwp.2019.8892158

Cited by 11 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the contrary, if the condition OM I 1 << 1 is not respected, Eq. (25) shows that IM D uω RF,1 +vω RF,2 is proportional to the quantities a 2 q , OM I 2|u| 1…”

Section: E Undesired Spurious Terms Of Particular Interestmentioning

confidence: 97%

“…Note finally that while this range of M dith is given for a specific case, optimum design parameters of a generic system can be extrapolated applying directly the equations ( 22),( 23), ( 24), (25).…”

Section: Proposed Countermeasure: Dithering Tonementioning

confidence: 99%

“…The analysis will allow to predict the insurgence of the problem in RoF systems designed for Radioastronomic applications. Extending the work presented in [25], an effective solution to reduce to acceptable levels the nonlinearities related to RB will subsequently be proposed, and analyzed, arriving to identify some important design parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, while for HD 2ω RF,1 this contribution is due only by the quantity OM I 1 (see Eq. (28)), for IM D ω RF 1,1 +ω dith it depends on both OM I 1 and OM I dith .Note finally that while this range of M dith is given for a specific case, optimum design parameters of a generic system can be extrapolated applying directly the equations (22),(23), (24),(25).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Controlling Rayleigh-Backscattering-Induced Distortion in Radio over Fiber Systems for Radioastronomic Applications

Nanni¹,

Giovannini²,

Hadi³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Radio over Fiber (RoF) Systems exploiting a direct modulation of the laser source are presently utilized within important Radioastronomic scenarios. Due to the particular operating conditions of some of these realizations, the phenomena which typically generate nonlinearities in RoF links for telecommunications applications can be here regarded as substantially harmless. However, these same operating conditions can make the RoF systems vulnerable to different kinds of nonlinear effects, related to the influence of the Rayleigh Backscattered signal on the transmitted one. A rigorous description of the phenomenon is performed, and an effective countermeasure to the problem is proposed and demonstrated, both theoretically and experimentally.

show abstract

“…On the contrary, if the condition OM I 1 << 1 is not respected, Eq. (25) shows that IM D uω RF,1 +vω RF,2 is proportional to the quantities a 2 q , OM I 2|u| 1…”

Section: E Undesired Spurious Terms Of Particular Interestmentioning

confidence: 97%

Section: Proposed Countermeasure: Dithering Tonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Controlling Rayleigh-Backscattering-Induced Distortion in Radio over Fiber Systems for Radioastronomic Applications

Nanni¹,

Giovannini²,

Hadi³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In a previous work, an appropriate cost-effective solution has been demonstrated, consisting in the introduction of a dithering tone as a further modulation current for the optical transmitter, which pushes the level of the nonlinear terms below the noise floor [15], [16].…”

mentioning

confidence: 99%

Optimal Configuration Mitigating Rayleigh-Backscattering-Induced Distortion in Radioastronomic Optical Fiber Systems

Nanni
¹
,

Giovannini
²
,

Lenzi³

et al. 2022

J. Lightwave Technol.
Self Cite

1
0
0
0

View full text Add to dashboard Cite

In the context of Radioastronomic applications where the Analog Radio-over-Fiber technology is used for the antenna downlink, detrimental nonlinearity effects arise because of the interference between the forward signal generated by the laser and the Rayleigh backscattered one which is re-forwarded by the laser itself toward the photodetector.The adoption of the so called dithering technique, which involves the direct modulation of the laser with a sinusoidal tone and takes advantage of the laser chirping phenomenon, has been proved to reduce such Rayleigh Back Scattering -induced nonlinearities. The frequency and the amplitude of the dithering tone should both be as low as possible, in order to avoid undesired collateral effects on the received spectrum as well as keep at low levels the global energy consumption.Through a comprehensive analysis of dithered Radio over Fiber systems, it is demonstrated that a progressive reduction of the dithering tone frequency affects in a peculiar fashion both the chirping characteristics of the field emitted by the laser and the spectrum pattern of the received signal at the fiber end.Accounting for the concurrent effects caused by such phenomena, optimal operating conditions are identified for the implementation of the dithering tone technique in radioastronomic systems.

show abstract

Fiber-based Microwave Interferometer monitoring the Delay of Fiber-Optic Antenna Downlinks in Radioastronomic Scenarios
Nanni
¹
,
Lenzi²,
Perini
³

et al. 2022
2022 Italian Conference on Optics and Photonics (ICOP)
0
0
0
0
View full text Add to dashboard Cite

Optimum Mitigation of distortion induced by Rayleigh Backscattering in Radio-over-Fiber links for the Square Kilometer Array Radio-Telescope

Cited by 11 publications

References 8 publications

Controlling Rayleigh-Backscattering-Induced Distortion in Radio over Fiber Systems for Radioastronomic Applications

Controlling Rayleigh-Backscattering-Induced Distortion in Radio over Fiber Systems for Radioastronomic Applications

Optimal Configuration Mitigating Rayleigh-Backscattering-Induced Distortion in Radioastronomic Optical Fiber Systems

Fiber-based Microwave Interferometer monitoring the Delay of Fiber-Optic Antenna Downlinks in Radioastronomic Scenarios

Contact Info

Product

Resources

About