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Chinese Optics Letters

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Hi,您目前在 全部期刊 期刊中, 论文搜索关键字 Microwave Photonics ，共找到 75 个内容。

Early Posting

A microwave-chip-based coherent multi-frequency RF driver is developed for a channel-interleaved photonic analog-to-digital converter (PADC) system, which comprises a multi-class optical demultiplexer and supports a sampling speed of 40 GSa/s. The generated signals from the RF driver are adjustable in both amplitude and phase. We analyze the relationship between the characteristics of generated RF driver signals and the demultiplexing performance in theory based on the OSDR. It is the most effective parameter to evaluate the performance of the demultiplexer in a PADC system without an EADC. By precisely adjusting the amplitude and phase of signals, the OSDR is optimized. The results verify the compatibility between the RF driver and the PADC system.
Chinese Optics Letters
2021, 19(8):
Early Posting

RF self-interference is a key issue for the application of in-band full-duplex communication in B5G and 6G communications. Compared with the electronic technology, the photonic technology has the advantages of wide bandwidth and high tuning precision, exhibiting the great potential to realize high interference cancellation depth over broad band. In this paper, a comprehensive overview of photonic enabled RF self-interference cancellation (SIC) is presented. The operation principle of photonic RF SIC is introduced and the advances in implementing photonic RF SIC according to the realization mechanism of phase reversal are summarized. For further realistic applications, the multipath RF SIC and the integrated photonic RF SIC are also surveyed. Finally, the challenges and opportunities of photonic RF SIC technology are discussed.
Chinese Optics Letters
2021, 19(11):
Early Posting

A broadband instantaneous multi-frequency measurement system based on chirped pulse compression, which potentially has sub-MHz accuracy and a hundred-GHz measurement range, is demonstrated. A signal-under-test (SUT) is converted into a carrier-suppressed double-sideband (CS-DSB) signal, which is then combined with an optical linearly frequency-modulated signal having the sweeping range covering the +1st-order sideband of the CS-DSB signal. By photodetection, low-pass filtering, and pulse compression, accurate frequencies of the SUT are obtained via locating the correlation peaks. In the experiment, single- and multi-frequency measurements with a measurement range from 3 to 18 GHz and a measurement accuracy of <±100 MHz are achieved.
Chinese Optics Letters
2021, 19(10):
Early Posting

An approach to generate high-speed and wideband frequency shift keying (FSK) signal based on carrier phase-shifted double sideband (CPS-DSB) modulation is proposed and experimentally validated. The core part of the scheme is a pair of cascaded polarization-sensitive LiNbO3 Mach-Zehnder Modulator and phase modulator, whose polarization directions of the principal axes are mutually orthogonal to each other. A proof-of-concept experiment is carried out, where a 0.5-Gb/s FSK signal with the carrier frequencies of 4/8 GHz and a 1-Gb/s FSK signal with the carrier frequencies of 8/16 GHz are generated successfully.
Chinese Optics Letters
2021, 19(10):
Microwave Photonics

We propose a photonics-assisted equivalent frequency sampling (EFS) method to analyze the instantaneous frequency of broadband linearly frequency modulated (LFM) microwave signals. The proposed EFS method is implemented by a photonic scanning receiver, which is operated with a frequency scanning rate slightly different from the repetition rate of the LFM signals. Compared with the broadband LFM signal analysis based on temporal sampling, the proposed method avoids the use of high-speed analog to digital converters, and the instantaneous frequency acquisition realized by frequency-to-time mapping is also simplified since real-time Fourier transformation is not required. Feasibility of the proposed method is verified through an experiment, in which frequency analysis of $Kα$-band LFM signals with a bandwidth up to 3 GHz is demonstrated with a moderate sampling rate of 100 MSa/s. The proposed method is highly demanded for analyzing the instantaneous frequency of broadband LFM signals used in radar and electronic warfare systems.
Chinese Optics Letters
2021, 19(1): 013901

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2020, 57(5): 050602
“纪念激光器发明60周年”专题
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2020, 49(11): 190

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2020, 47(6): 0606003

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2020, 47(12): 1205004

2020, 44(2): 14
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