PMD measurements on installed fibers and polarization sensitive components

Schiano, M.

doi:10.1007/s10297-004-0011-3

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…[12] On the other hand, the PMD coefficient of fiber is rather low ( 0.1 ps/ √ km). [20,21] Consequently, in the electronic compensation scheme, the influence of the PMD is very limited. Thus, the system can operate well without any scrambler for the sake of economics and reliabilities.…”

Section: Resultsmentioning

confidence: 99%

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation*

Xue¹,

Zhao²,

Quan³

et al. 2020

Chinese Phys. B

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We demonstrate the transmission of a microwave frequency signal at 10 GHz over a 112-km urban fiber link based on a novel simple-architecture electronic phase compensation system. The key element of the system is the low noise frequency divider by 4 to differentiate the frequency of the forward signal from that of the backward one, thus suppressing the effect of Brillouin backscattering and parasitic reflection along the link. In terms of overlapping Allan deviation, the frequency transfer instability of 4.2 × 10−15 at 1-s integration time and 1.6 × 10−18 at one-day integration time was achieved. In addition, its sensitivity to the polarization mode dispersion in fiber is analyzed by comparing the results with and without laser polarization scrambling. Generally, with simplicity and robustness, the system can offer great potentials in constructing cascaded frequency transfer system and facilitate the building of fiber-based microwave transfer network.

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Section: Resultsmentioning

confidence: 99%

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation*

Xue¹,

Zhao²,

Quan³

et al. 2020

Chinese Phys. B

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“…In addition, randomly varying birefringence of field-deployed optical fibers results in some scrambling of the polarization of propagating signals [44], [45]. To maximize the effect of the Rayleigh backscattering, we assume the same polarizations ( (z, t) = 1) of interfering fields between the local and backscattering lights.…”

Section: B 100 Km Full Link Simulationmentioning

confidence: 99%

Fundamental Limitations of Rayleigh Backscattering Noise on Fiber-Based Multiple-Access Optical Frequency Transfer

Hu,

Tian,

et al. 2020

Preprint

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Ultimate limits of performance for single-sourcebidirectional architecture e.g., optical frequency transfer are set by delay fluctuations within the host material, e.g., optical fiber or atmospheric channel, which is dynamically induced. The most common manifestation of such phase disorder in the optical fiber is backscattering lights coming from Rayleigh backscattering and fresnel reflection, which is observed in nearly all single-sourcebidirectional architectures and can lead to both irreversible coherence losses as well as undesirable interference coupling.While it has been shown that backscattering induced phase noise can be suppressed by adopting acoustic-optic-modulators (AOMs) at the local and remote sites to break the frequency symmetry in both directions. However, this issue can not be avoided for conventional fiber-optic multiple-access coherent optical phase dissemination in which the interference of the signal light with the Rayleigh backscattered light will probably destroy the coherence of the stabilized optical signal. We suppress the backscattering effect by locally breaking the frequency symmetry at the extraction point by inserting an additional AOM. Here, we theoretically analyze and experimentally demonstrate an adddrop one more AOM approach for suppressing the Rayleigh backscattering within the fiber link. Near-complete suppression of backscattering noise is experimentally confirmed through the measurementthe elimination of a common interference term of the signal light and the Rayleigh backscattered light. The results demonstrate that the Rayleigh backscattering light has a limited effect compared to the residual delay-limited fiber phase noise on the system's performance. Our results also provide new evidence that it is possible to largely suppress Rayleigh and other backscattering noise within a long optical fiber link, where the accumulated phase noise could be large, by using frequency symmetry breaking at each access node to achieve robust multiple-access coherent optical phase propagation in spite of scatters or defects.

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“…Esta modelagem maxwelliana,é considerada clássica e se mostra excelente quando o DGD apresenta descorrelaç ao rápida, para o domnio da frequ encia e do tempo [6]. Entretanto, apesar deste modelo ter sido aceito por um longo tempo, alguns trabalhos experimentais mostraram que nem sempre a estatstica se apresenta exatamente dessa forma [7], [8], e mais recentemente [9]. Essa idéia, de que canais diferentes experimentam diferentes distribuiç oes estatsticas,é a base de um modelo proposto por Brodsky et al [10] e [11], chamado de hinge [13].…”

Section: Introduç Aounclassified

Simulações de Hinge Model utilizando Previsão Temporal da Evolução do DGD

Ferreira¹,

Weid²

2008

Anais Do XXVI Simpósio Brasileiro De Telecomunicações

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Resumo Recentemente, foi proposto um novo modelo para análise estatstica da PMD em sistemas de transmiss aoóptica, chamado de hinge model. A modelagem correta de um sistema está relacionada com a capacidade de análise de falhas e de correç ao de eventuais problemas, como PMD polarization mode dispersion. Nesse artigoé apresentado um estudo do hinge model, através de simulaç oes computacionais baseadas num método de previs ao do comportamento temporal do DGD (differencial group delay) em sistemas de transmiss ao a brasópticas. A capacidade de previs ao de situaç oes de falha desse método temporalé discutida. Palavras-Chave Polarisation mode dispersion (PMD), hinge model, evoluç ao temporal, probabilidade de falha. Abstract Recently, a hinge model for optical ber transmission link has been proposed. Modelling of the DGD temporal changes represents a critical aspect of outage probability characterization and PMD mitigation capacity. In this work some simulations of hinge model are presented considering a temporal evolution simulator. Outage probability using temporal simulations are discussed.

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PMD measurements on installed fibers and polarization sensitive components

Cited by 5 publications

References 11 publications

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation*

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation*

Fundamental Limitations of Rayleigh Backscattering Noise on Fiber-Based Multiple-Access Optical Frequency Transfer

Simulações de Hinge Model utilizando Previsão Temporal da Evolução do DGD

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