Maintenance of broadband detection in photonic time-stretched coherent radar employing phase diversity

Zhang, Siteng; Li, Xing; Chen, Jianping; Zou, Weiwen

doi:10.1364/oe.27.032892

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…The performance of the photonic time-stretch coherent radar was further improved by later studies [388]- [390]. The SNR of the time-stretching receiver in the radar was analyzed in [388], and a photonic time-stretch coherent radar system operating at the W band with a bandwidth of 12 GHz was experimentally demonstrated, achieving a range resolution of 1.48 cm.…”

Section: B All-optical Radar Architecturementioning

confidence: 99%

“…As a result, the measurement range was improved to more than 40 m with a range resolution of ∼4 cm. Furthermore, a phase diversity scheme based on a dual-output MZM was employed to decrease the frequency response fluctuation induced by dispersion [390]. Experiment results showed that the frequency response fluctuation was reduced by 9.7 dB and the peak power in single target detection was increased by 6.7 dB.…”

Section: B All-optical Radar Architecturementioning

confidence: 99%

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Microwave Photonic Radars

Pan

Zhang

2020

J. Lightwave Technol.

287

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As the only method for all-weather, all-time and longdistance target detection and recognition, radar has been intensively studied since it was invented, and is considered as an essential sensor for future intelligent society. In the past few decades, great efforts were devoted to improving radar's functionality, precision, and response time, of which the key is to generate, control and process a wideband signal with high speed. Thanks to the broad bandwidth, flat response, low loss transmission, multidimensional multiplexing, ultrafast analog signal processing and electromagnetic interference immunity provided by modern photonics, implementation of the radar in the optical domain can achieve better performance in terms of resolution, coverage, and speed which would be difficult (if not impossible) to implement using traditional, even state-of-the-art electronics. In this tutorial, we overview the distinct features of microwave photonics and some key microwave photonic technologies that are currently known to be attractive for radars. System architectures and their performance that may interest the radar society are emphasized. Emerging technologies in this area and possible future research directions are discussed.

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Section: B All-optical Radar Architecturementioning

confidence: 99%

Section: B All-optical Radar Architecturementioning

confidence: 99%

Microwave Photonic Radars

Pan

Zhang

2020

J. Lightwave Technol.

287

View full text Add to dashboard Cite

show abstract

“…Based on this, Gonsalves introduced the phase diversity algorithm [ 14 ], which recovers the distorted phase information using an objective function that incorporates images from different defocus planes. Since then, the PD method has undergone comprehensive research by institutions such as the University of Central Florida [ 15 ], Lockheed Martin Space Systems [ 16 , 17 ], and the Chinese Academy of Sciences [ 18 , 19 , 20 ], affirming its practicality. This method has already found application in adjusting ground-based telescopes and co-phase detection for segmented mirror telescopes.…”

Section: Introductionmentioning

confidence: 99%

Exploring Wavefront Detection in Imaging Systems with Rectangular Apertures Using Phase Diversity

Li,

Guo,

Liu

2024

Sensors

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The attainment of a substantial aperture in the rotating synthetic aperture imaging system involves the rotation of a slender rectangular primary mirror. This constitutes a pivotal avenue of exploration in space telescope research. Due to the considerable aspect ratio of the primary mirror, environmental disturbances can significantly impact its surface shape. Active optical technology can rectify surface shape irregularities through the detection of wavefront information. The Phase Diversity (PD) method utilizes images captured by the imaging system to compute wavefront information. In this study, the PD method is applied to rotating synthetic and other rectangular aperture imaging systems, employing Legendre polynomials to model the wavefront. The study delved into the ramifications stemming from the aperture aspect ratio and aberration size.

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Advanced Photonics-Based Radar Signal Generation Technology for Practical Radar Application

Tong

2021

J. Lightwave Technol.

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Maintenance of broadband detection in photonic time-stretched coherent radar employing phase diversity

Cited by 3 publications

References 23 publications

Microwave Photonic Radars

Microwave Photonic Radars

Exploring Wavefront Detection in Imaging Systems with Rectangular Apertures Using Phase Diversity

Advanced Photonics-Based Radar Signal Generation Technology for Practical Radar Application

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