Phase-Stabilized Side-Branch RoF Link for Extensible Frequency Dissemination in Distributed Systems

Jiang, Zhongze; Yin, Feifei; Dai, Yitang; Ren, Tianpeng; Xu, Kun

doi:10.1109/jphot.2021.3113663

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…The 6G envisages new services such as connected car fleets, virtual reality, remote healthcare, massive Internet-of-thing (IoT) and holography streaming on-demand [1][2][3]. In addition to communications, the ubiquitous wireless networks are also anticipated to facilitate sensing and precise location services for applications including industrial manufacturing, security and wireless robot control [4].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to communications, the ubiquitous wireless networks are also anticipated to facilitate sensing and precise location services for applications including industrial manufacturing, security and wireless robot control [4]. These visions require future 6G infrastructure to provide accurate clock and timing to the end users together with high throughput data connections [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synchronising Clock and Carrier Frequencies with Low and Coherent Phase Noise for 6G

Zhou

Nopchinda

Darwazeh

et al. 2023

2023 IEEE Radio and Wireless Symposium (RWS)

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Using radio over fiber techniques, we generate, transmit and receive a highly accurate 5-GHz spaced frequency comb, with carriers of extremely low phase noise. The carriers are used in an over the air transmission experiment, demonstrating lower phase noise than a commercially available PLL. The low phase noise and scalability of the design offer a new method of carrier and low-jitter clock distribution satisfying the stringent demands of future 6G systems. We demonstrate the efficacy of the method by over the air transmission of 128-QAM signal at 25 GHz. The recovered signal shows the advantage of low phase noise carriers even at received powers approaching -50 dBm

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synchronising Clock and Carrier Frequencies with Low and Coherent Phase Noise for 6G

Zhou

Nopchinda

Darwazeh

et al. 2023

2023 IEEE Radio and Wireless Symposium (RWS)

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Fiber-optic radio frequency transfer with enhanced frequency stability using fiber Brillouin amplifiers

Ren,

Hu,

Chen

et al. 2024

Opt. Express

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The frequency stability of long-distance two-way fiber-optic radio frequency (RF) transfer is directly affected by the optical signal-to-noise ratio (OSNR) of optical amplifiers. In this paper, we have proposed a stimulated Brillouin scattering (SBS)-based optical amplification scheme with high OSNR for two-way fiber-optic RF frequency transfer over single mode fibers (SMF). At the remote and local site, the modulated carrier transferred from the opposite was amplified and then frequency upshifted by Brillouin frequency shift (BFS) for pump generation. This approach can avoid the use of additional pump lasers and phase-locked loops for wavelength stabilization of the pump. The pump was injected into the fiber link and counter-propagated with the signal to amplify the modulated carrier. A 2.2 GHz RF signal transfer with the proposed SBS-based optical amplification schemes was demonstrated over a 100 km fiber link. The experimental results illustrated that the OSNR was increased by 35 dB and 32 dB at the local site and the remote site, respectively, compared to the results obtained with erbium-doped fiber amplifiers (EDFA)-based optical amplification. Benefiting from improved OSNR, the frequency stability was increased by more than one order of magnitude below 1000 s averaging time, and the phase noise was reduced to the noise floor below 0.1 Hz offset frequency. The proposed optical signal amplification approach has a potential application for transferring atomic clocks over long-haul fiber links.

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Phase-Stabilized Side-Branch RoF Link for Extensible Frequency Dissemination in Distributed Systems

Cited by 2 publications

References 34 publications

Synchronising Clock and Carrier Frequencies with Low and Coherent Phase Noise for 6G

Synchronising Clock and Carrier Frequencies with Low and Coherent Phase Noise for 6G

Fiber-optic radio frequency transfer with enhanced frequency stability using fiber Brillouin amplifiers

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