Multi-Access RF Frequency Dissemination Based on Round-Trip Three-Wavelength Optical Compensation Technique Over Fiber-Optic Link

Jiang, Mingyu; Chang, Yaqing; Cheng, Nan; Sun, Yanguang; Wang, Jialiang; Wu, Rui; Yang, Fei; Cai, Haiwen; Gui, Youzhen

doi:10.1109/jphot.2019.2909777

Cited by 13 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in the long-distance transmission system, the effects of fibers can accumulate due to changes in ambient temperature or external vibrations, which cannot be ignored. 5 Currently, frequency synchronization techniques generally use active and passive compensation methods in order to achieve stable transmission of the principal oscillator signal, 6 and phase compensation uses multipliers and phase conjugation, 7,8 we use microwave photon frequency doubling method to generate stable millimeter-wave LO signals, and all-optical phase conjugation method is used to attenuate the effect of phase jitter. Whereas time synchronization techniques generally use bidirectional transmission or feedback, 9,10 in this paper, we use bidirectional transmission and frequency tapping using the time-frequency domain transform (TFDT) method to obtain the time delay.…”

Section: Introductionmentioning

confidence: 99%

Highly accurate time-frequency synchronized self-reconfiguration network based on a two-fiber unidirectional path ring

Ma,

Zhang,

et al. 2024

Opt. Eng.

View full text Add to dashboard Cite

We propose and demonstrate a self-reconfiguration network of high-precision timefrequency synchronization. The local oscillator (LO) signal and time reference signal generated by the central site are transmitted to the two-fiber unidirectional ring in opposite directions. The all-optical microwave phase conjugation and the time-frequency domain transform measurement are utilized to eliminate phase fluctuation and time delay introduced by optical fiber. The two-fiber unidirectional ring can automatically switch the working loop when the fiber link is broken and avoid manual intervention, which realizes the self-healing of the network. A 20 GHz frequency signal and 1 pulse per second time signal are transferred along a 7 km fiber ring. At 1000 s averaging time, the long-term frequency stability of the order of 10 to 16 and time stability of the order of ps can be achieved at remote sites. When the network is interrupted, the proposed system can automatically recover the time-frequency synchronization from the failure state within 37 ms.

show abstract

Section: Introductionmentioning

confidence: 99%

Highly accurate time-frequency synchronized self-reconfiguration network based on a two-fiber unidirectional path ring

Ma,

Zhang,

et al. 2024

Opt. Eng.

View full text Add to dashboard Cite

show abstract

“…Fiber-based frequency synchronization has been under extensive research, and it achieves high precision frequency synchronization by compensating phase fluctuation in real time. However, most studies have focused on phase fluctuation caused by temperature drift and mechanical vibration in the environment where the fiber is located [6]- [8]. In addition, phase decorrelation due to fiber dispersion will become important after long-distance transmission, especially when using lasers with wide linewidths, because dispersion introduces different delays in different optical tones [9].…”

Section: Introductionmentioning

confidence: 99%

Chromatic Dispersion Compensation in Phase-Stabilized Dissemination System of Broadband Signals Based on Phase Conjugation

Wang,

Liu,

Zhang

et al. 2023

IEEE Photonics J.

View full text Add to dashboard Cite

We present a dispersion-independent phase stabilized distribution architecture for broadband signal based on photonic microwave phase conjugation. RoF signals are distributed from the central station to each base station via a fiber ring network. The elimination of dispersion-induced optical phase decorrelation is achieved because the backward transmission of the phaseconjugated signal, thus the EVM of the RoF signal is optimized. A proof-of-concept experiment is demonstrated. A distribution of QPSK modulated 23-GHz, 400M Baud RoF signals from the central station to a remote base station is obtained via a fiber optic loop. The demodulated constellation and error vector magnitude with and without dispersion compensation are measured at the remote base station. When we set the length of the fiber loop to 58km, the EVM is reduced by 8% after dispersion compensation, and the compensated EVM can reach the threshold value of 17.5% specified by 3GPP for 5G when the received optical power of PD is 4dBm.

show abstract

“…Compared with atmospheric channels and satellite links, optical fiber links have the advantages of low loss, high reliability, and anti-electromagnetic interference, which are suitable for the long-distance transmission of signals [4]. However, the length and refractive index of the optical fibers are susceptible to environmental temperature and mechanical vibration, which may cause phase fluctuations of the signal and deteriorate the frequency stability at the remote site [5].…”

Section: Introduction He High-precision Frequency Transmission Techniquementioning

confidence: 99%

An All-Optical Ka-Band Microwave Long-Distance Dissemination System Based on an Optoelectronic Oscillator

Zhang

Xie

et al. 2022

IEEE Photonics J.

View full text Add to dashboard Cite

We proposed an all-optical Ka-band microwave long-distance dissemination system based on an optoelectronic oscillator (OEO). In this system, a single tone with high spectrum purity and low phase noise is excited by an injection-locked OEO, and distributed to the remote site through the fiber loop of the OEO at the same time. The second harmonic of the reference signal modulates the round-tripping optical signal at the local site, which achieves the phase conjugator at the optical domain. At the remote end, the phase-conjugated signal is photomixed with the OEO signal to eliminated the phase offset. The proposed scheme improves the phase noise of the high frequency signal received at the remote site and reduces the photoelectric conversion loss. We demonstrated the transmissions of a 36 GHz frequencyquadrupled RF signal along a 6 km optical fiber loop, and the frequency stability is 1.069×10 -14 /1s and 3.3×10 -16 /1000s. The single-sideband (SSB) phase noise of the received signal at the remote site is up to -130 dBc/Hz at 10 kHz offset frequency.

show abstract

Multi-Access RF Frequency Dissemination Based on Round-Trip Three-Wavelength Optical Compensation Technique Over Fiber-Optic Link

Cited by 13 publications

References 22 publications

Highly accurate time-frequency synchronized self-reconfiguration network based on a two-fiber unidirectional path ring

Highly accurate time-frequency synchronized self-reconfiguration network based on a two-fiber unidirectional path ring

Chromatic Dispersion Compensation in Phase-Stabilized Dissemination System of Broadband Signals Based on Phase Conjugation

An All-Optical Ka-Band Microwave Long-Distance Dissemination System Based on an Optoelectronic Oscillator

Contact Info

Product

Resources

About