RF Power Conversion Efficiency of Photodiodes Driven by Mach–Zehnder Modulators

Gliese, U.; Colladay, Kristina; Hastings, Alexander S.; Tulchinsky, D.A.; Urick, Vincent J.; Williams, K.J.

doi:10.1109/tmtt.2010.2075530

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…For every downlink in the system, the mmWave signals are generated and converted to the optical domain at the CO. To this end, a polarization-dependent Mach-Zehnder modulator (MZM), an accompanying polarization controller, and a laser source are used. The MZM is quadrature-biased, where the electrical field of the light carrier is then modulated by the mmWave signals as [27], [28]:…”

Section: B Mmwave-over-fiber Wireless Linkmentioning

confidence: 99%

“…Furthermore, the link's S 21,opt parameter description can either be acquired through simulations or measurements. It depends on several parameters, including the employed optical power, influencing the MZM's slope efficiency [16], the MZM's bias voltage [27] and the photodetector's responsivity. Finally, the mmWave-over-fiber submodel also includes the non-linear distortion introduced by the MZM's electro-optical conversion, as described by Eq.…”

Section: Simulation Suitementioning

confidence: 99%

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System-Level Simulation Suite for the Design of mmWave-Over-Fiber-Based Distributed Antenna Systems

Moerman

Caytan

Messem

et al. 2023

IEEE Trans. Microwave Theory Techn.

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Although challenging propagation conditions reduce its reliability, the mmWave spectrum is considered a cornerstone of (beyond-)5G networks. Recently, distributed antenna systems (DASs) surrounding the mobile users with multiple remote antenna units (RAUs) interconnected by mmWave-over-fiber technology were identified as a prime candidate to unlock high throughput and reliable coverage. This paper proposes a dedicated simulation suite facilitating the deployment of such a mmWave-over-fiber-based DAS by accurately predicting system-level performance and enabling time-efficient optimization of the hardware configuration, including the RAUs, the central office (CO) and the signal processing units, towards the target application. It incorporates accurate models for the mmWave-over-fiber link and the amplifiers, including non-linear distortion and noise, full-wave electromagnetic models for the antenna front-ends, and analytical models for the wireless channel. The simulation suite is validated by a measurement campaign, not only focusing on a single mobile user served by a fixed-beam RAU, but also considering a multi-beam RAU serving two users simultaneously by means of two independent mmWave-over-fiber links. The model accurately predicts up-and downlink quality over a wide range of user positions, different system parameters, and also accurately captures inter-user interference.

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Section: B Mmwave-over-fiber Wireless Linkmentioning

confidence: 99%

Section: Simulation Suitementioning

confidence: 99%

System-Level Simulation Suite for the Design of mmWave-Over-Fiber-Based Distributed Antenna Systems

Moerman

Caytan

Messem

et al. 2023

IEEE Trans. Microwave Theory Techn.

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“…An MZM can be modulated at a higher modulation depth, however the fundamental transfer function is sinusoidal. Increasing the modulation depth and forcing a more square wave output results in distortion in the link which manifests as third order nonlinearity which may negatively affect the probe performance [17,18]. To achieve the maximum extinction ratio of 30 dB for the MZM, a feedback loop on one of the output ports of the MZM is required to reduce the drift over time of the extinction ratio.…”

Section: Photodiode Modulationmentioning

confidence: 99%

Development of an Optically Modulated Scatterer Probe for a Near-Field Measurement System

Patrick¹,

Hutchinson²,

Boos³

2016

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Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S REPORT NUMBER(S) Near-field measurement PhotodiodesIn high-fidelity, near-field measurements, the measurement probe must minimally impact the near-field of the antenna-under-test. To accomplish this, we developed an optically modulated, near-field probe which consists of a rectangular dipole antenna loaded with a photodiode. The modulation scheme separates scattering off of the probe from background reflections. We present the design and performance of an optically modulated scatterer (OMS) probe for use in a near-field measurement system.

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“…Traditionally, a low-noise amplifier (LNA) will be employed on the front-end of an analog optical link, reducing the cascaded noise figure (NF) while taking advantage of the low-loss optical fiber. However, a low-NF and high-gain analog optical link without an RF LNA is attractive for applications such as integrated antennas with a photonic balun, high-power-handling front ends [1], high-efficiency RF power remoting [2] and optoelectronic oscillators [3].…”

Section: Introductionmentioning

confidence: 99%