Photonic Generation of Pulsed Microwave Signal Based on Phase Shifted Lyot Optical Filter

Wang, Wen Ting; Liu, Jian Guo; Mei, Hai Kuo; Wen, Sun; Wang, Wei Yu; Yuan, Huadong; Zhu, Ning Hua

doi:10.1109/lpt.2015.2443851

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…13 [9], [223]. The optical spectrum of the ultrashort optical pulse is firstly shaped according to the profile of the desired waveform with an optical spectral shaper such as superimposed chirped FBG [206], Sagnac loop filter [207], tilted FBG [208], phaseshifted Lyot optical filter [209], differential group delay element [210], and optical programmable processor [211], [212]. The shaped spectrum is then mapped into the time domain via the dispersive element.…”

Section: B Photonic Radar Waveform Generationmentioning

confidence: 99%

Microwave Photonic Radars

Pan

Zhang

2020

J. Lightwave Technol.

315

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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 Photonic Radar Waveform Generationmentioning

confidence: 99%

Microwave Photonic Radars

Pan

Zhang

2020

J. Lightwave Technol.

315

View full text Add to dashboard Cite

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Frequency-selectable microwave generation based on on-chip switchable spectral shaping and wavelength-to-time mapping

Sun¹,

Wang²,

Deng³

et al. 2023

Opt. Express

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We propose and experimentally demonstrate a scheme for the photonic generation of pulsed microwave signals with selectable frequency based on spectral shaping and wavelength-to-time mapping (WTTM) technique. The frequency selectivity is realized by channel switching on an integrated silicon-on-insulator (SOI) spectral shaping chip. The incident signal is spectrally shaped by the asymmetric Mach-Zehnder interferometer (MZI) in the selected channel, and an optical spectrum with uniform free spectral range (FSR) can be generated in a broad bandwidth up to dozens of nanometers, implying large microwave signal duration after WTTM if a pulse light source with matched bandwidth is available. Microwave pulses of frequency from 3.6 GHz to 28.4 GHz with a fixed interval are experimentally generated respectively. The realization of eight microwave frequencies selectable with only one shared dispersive element (DE) required indicates high expansibility in the frequency cover range of our scheme by tuning the dispersion value in WTTM.

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Frequency-Tunable Pulsed Microwave Waveform Generation Based on Unbalanced Single-Arm Interferometer Excited by Near-Infrared Femtosecond Laser

et al. 2021

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Femtosecond laser-excited generation of frequency-tunable microwave pulses, based on an unbalanced single-arm interferometer with frequency-to-time mapping, has been proposed and demonstrated with easy-to-obtain commercial devices. The optical wave-to-microwave frequency conversion, which involves continuous tuning in the range from 2.0 GHz to 19.7 GHz, was achieved based on simple spatial–optical group delay adjustment. Additionally, the pulse duration of the microwave waveform was measured to be 24 ns as the length of the linear dispersion optical fiber was fixed at 20 km. In addition, owing to the designs of the single-arm optical path and polarization-independent interference, the generated microwave pulse train had better stability in terms of frequency and electrical amplitude. Furthermore, a near-triangular-shaped microwave pulse at 4.5 GHz was experimentally obtained by the superposition of two generated sinusoidal signals, which verified the potential of this system to synthesize special microwave waveform pulses.

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Photonic Generation of Pulsed Microwave Signal Based on Phase Shifted Lyot Optical Filter

Cited by 3 publications

References 15 publications

Microwave Photonic Radars

Microwave Photonic Radars

Frequency-selectable microwave generation based on on-chip switchable spectral shaping and wavelength-to-time mapping

Frequency-Tunable Pulsed Microwave Waveform Generation Based on Unbalanced Single-Arm Interferometer Excited by Near-Infrared Femtosecond Laser

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