Dynamic range of optically amplified RF optical links

Sabido, D.J.M.; Kazovsky, L.G.

doi:10.1109/22.954813

Cited by 13 publications

(3 citation statements)

References 7 publications

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“…Using (11) and (12), we can represent the final system noise figure as (15) Based on (3) and (11), using an MZI modulator allows the system gain to be maximized while reducing the optical carrier and its associated noise. Such a benefit may not be available if using a different type of modulator.…”

Section: B Noise Figurementioning

confidence: 99%

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Silicon RF-Photonic Filter and Down-Converter

Tu¹,

Rasras²,

Gill³

et al. 2010

J. Lightwave Technol.

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An RF-photonic filter and down-converter system based on a compact and fully tunable silicon optical filter has been demonstrated and analyzed. Its frequency down-conversion was implemented using optical heterodyne detection with an injection locked laser. This system filters a 1.25 GHz-wide signal with 20 dB filter rejection and a very broad 20 GHz center tuning range. The frequency down-conversion process is operated in a low-IF mode to avoid laser low frequency noises. Measured system Spurious-Free Dynamic Range (SFDR) of 94.3 dB*Hz 2 3 has been limited by the optical losses from I/O coupling and measurement setup. We examined experimentally that 105.3 dB*Hz 2 3 SFDR is achievable if the encountered optical loss were reduced to the filter's intrinsic loss. Based on the excellent agreements between measured and simulated results, we explore the critical improvements of the silicon photonic devices needed for the system to achieve 118 dB*Hz 2 3 SFDR and briefly review the status of the component technologies. Index Terms-Coherent detection, microwave-photonic filter, RF-photonic filter, silicon photonics, ultra wide band filter. I. INTRODUCTION M ILITARY industries continue to have strong interest in ultra-wide-bandwidth RF-photonic systems, primarily due to their ability to deliver performance with unprecedented high time-bandwidth product [1]. As communication/electronic warfare systems evolve to handle applications involving commercial cellular, fixed wireless, and high frequency radars all in a single platform, the system instantaneous bandwidth might reach 100 GHz. Designing with a conventional approach for such high spectral range would yield a complex system with enormous size, weight and power consumption. Though the speed of modern semiconductor devices already supports RF IC with bandwidths exceeding many tens of gigahertz, there is still not a filter technology competitive enough to facilitate radio operations with a similar bandwidth. Recent tunable filters (mostly MEMS or LTCC cavity-based) have center frequencies that are confined to a range of less than 10 GHz [2]-[4] and,

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Section: B Noise Figurementioning

confidence: 99%

“…Applying (15) and (17), the SFDR of this coherent heterodyne detection system can be obtained with dB dB (18) For a system requiring further electrical amplification, its cascaded gain, NF, and IP3 can be calculated with conventional formulations for 50 matched systems (details are omitted here).…”

Section: Sfdrmentioning

confidence: 99%

Silicon RF-Photonic Filter and Down-Converter

Tu¹,

Rasras²,

Gill³

et al. 2010

J. Lightwave Technol.

View full text Add to dashboard Cite

show abstract

“…Asimismo, se han reportado estudios sobre los efectos de las características no-lineales de diodos láser configurados en modulación directa [7] y efectos de distorsión causados por moduladores tipo MZ en enlaces RoF [8][9]. Posteriormente en [10][11] se definieron parámetros para identificar el máximo rango dinámico y las mínimas pérdidas de inserción en un enlace óptico modulado externamente con subportadoras de RF y en [12] se ampliaron los estudios mencionados anteriormente con el reporte y demostración de un análisis de prestaciones de calidad de un sistema de transmisión RoF considerando requerimientos generados por efectos de propagación de ondas milimétricas además de la evaluación de diferentes formatos de modulación. Asimismo, en [13] se presenta un estudio sobre los efectos de ruido e intermodulación en enlaces RoF que permiten identificar las limitaciones en el desempeño del sistema, también un análisis de la relación portadora-banda lateral [14], así como estrategias para reducir la figura de ruido en enlaces de fibra óptica modulados con señales analógicas [15] y un análisis sobre la optimización del punto de cuadratura de un modulador óptico tipo MZ para aplicaciones RoF [16].…”

Section: Introductionunclassified