Flexible New Opto-Microwave Design Approach for Radio-Over-Fiber Applications: A Case Study of Low-Cost 60-GHz VCSEL-Based IF-RoF Link

Viana, Carlos; Tegegne, Zerihun Gedeb; Algani, Catherine

doi:10.1109/tmtt.2018.2854192

Cited by 6 publications

(10 citation statements)

References 32 publications

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“…The concept of Radio-over-Fiber directly modulates the laser with an RF signal, transmits the modulated optical signal through the fiber, and detects its RF envelope through a photodetector. As described in [6], this scheme is suitable for home area networks (HAN) and enables the use of low-cost opto-electronic components such as Vertical Cavity Emitting Surface Lasers (VC-SEL) together with multimode fiber, even up to millimeter-wave frequencies when using Intermediate-Frequency (IF) scheme. This paper however refers to a Direct-RoF scheme where the RF signal is within the bandwidth of the VCSEL and directly The typical architecture of the RoF link composed of a laser, an optical fiber and a photodetector is shown in Fig.…”

Section: Rof Link Description and Experimental Setupmentioning

confidence: 99%

“…These models were implemented in a standard microwave systems simulator named ADS software from Keysight Technologies and efficiently represented the noise figure and the non-linearity of the link. However, some deviations to the measured non-linearity of the laser were observed [6].…”

Section: Introductionmentioning

confidence: 97%

“…Indeed, at very high frequencies, the coverage distance is limited up to several meters due to the substantial signal attenuation in these frequency bands. Hence, radio-over-fiber (RoF) technologies are a good alternative to improve the coverage of Home Area Networks (HAN) [6] and can be privileged in a larger scale of applications as in stadium or tunnel.…”

Section: Introductionmentioning

confidence: 99%

“…Many approaches to develop figures of merit taking into account the optical devices characteristics have been proposed in [1]- [22]. In [6], a complete set of Opto-Microwave (OM) This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ quantities has been identified, which connects optical devices with microwave tools and concepts.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the similarities between the large signal behavior of both lasers (e.g., VCSEL LIV curves [25], [26]) and power amplifiers (e.g., amplifier transfer function), some models have been developed, based on the existing literature about behavioral modeling of power amplifiers [27]- [35]. In [6], the large signal behavior is modeled by using the Hyperbolic Tangent (tanh) to fit the simulations with the measurements; an approach that was already proposed in the early 1990s. However, the main disadvantage of this method is that this function does not allow the user to adapt the model to any kind of device by changing the knee sharpness of the amplitude-to-amplitude (AM/AM) curve.…”

Section: Introductionmentioning

confidence: 99%

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Improved Nonlinear Model Implementation for VCSEL Behavioral Modeling in Radio-Over-Fiber Links

Giovannini

Hadi

Prat

et al. 2022

J. Lightwave Technol.

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This paper proposes an improved model for the nonlinear behavior of the components of Radio-over-Fiber (RoF) links focusing here on the laser source. In a previous work, it was shown with a flexible new opto-microwave design approach a first behavioral model of RoF links that exploited the hyperbolic tangent function (the so-called tanh model) to model the high-power nonlinearities. Since this was not sufficient to simulate adequately all the nonlinearities, in this work, for the first time in the authors' knowledge, the improved nonlinear model based on Cann's model is developed, on an electro optic transducer. Then the amplitudeto-amplitude conversion of the link is better taken into account with the introducing of nonlinear properties of the link at high input power in the model. The new transfer equation includes several parameters that can be adjusted to adapt the model to any of the components, especially the photo-emitters under study, which are the main cause of this type of nonlinear behavior of the system. In particular, this improved model is applied on the state-of-the-art 850 nm GaAs Vertical Cavity Surface Emitting Laser (VCSEL), simulating several Figures of Merit such as the Error-Vector Magnitude (EVM) of a Long Term Evolution (LTE) signal with a Quadrature Phase Shift Keying (QPSK)and the output amplitude-modulated power versus input amplitude-modulated power, also called AM/AM curve. This new proposed nonlinear model outperforms other existing behavioral models and its non linear simulation better fits with the measurements. Finally, we Manuscript

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Section: Rof Link Description and Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%