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1

Outage in PMD compensated optical fiber line due to uncertainty of PMD estimation

Lach Z.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 7

86--89

EN

The effect of uncertain control of a first order PMD compensator on outage probability in fiber optic communication line is analyzed. For a PMD compensator – PMD monitor set a characteristics is proposed that is capable of presenting limits of compensation. Relation between outage probability and uncertainty of estimated PMD parameters, used to control the compensator, is quantified by numerical calculations. Consequences of the uncertainty for maximum transmission reach are evaluated.

PL

Przeanalizowano wpływ niepewności sterowania kompensatorem PMD pierwszego rzędu na prawdopodobieństwo niedostępności w światłowodowej linii telekomunikacyjnej. Dla układu kompensator PMD – monitor PMD zaproponowano charakterystykę umożliwiającą prezentację granic kompensacji. Numerycznie przeprowadzono ocenę ilościową relacji pomiędzy prawdopodobieństwem niedostępności a niepewnością estymacji parametrów PMD, zastosowanych do sterowania kompensatorem. Oceniono skutki niepewności dla maksymalnego zasięgu transmisji.

2

Synthesis of dispersion-compensating triangular lattice index-guiding photonic crystal fibres using the directed tabu search method

Karim F.

Opto-Electronics Review

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2017

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Vol. 25, No. 1

41--45

EN

In this paper, triangular lattice index-guiding photonic crystal fibres (PCFs) are synthesized to compensate the chromatic dispersion of a single mode fibre (SMF-28) for an 80 km optical link operating at 1.55 µm, by using a directed tabu search algorithm. Hole-to-hole distance, circular air-hole diameter, solid-core diameter, ring number and PCF length parameters are optimized for this purpose. Three synthesized PCFs with different physical parameters are compared in terms of their objective functions values, residual dispersions, compensation ratios and confinement losses.

3

Analysis of the Possibilities for Using a Uniform Bragg Grating in a Tunable Dispersion Compensator

Wójcik W., Kisała P., Yussupova G., Kussambayeva N., Kashaganova G., Harasim D.

International Journal of Electronics and Telecommunications

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2015

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Vol. 61, No. 4

381-387

EN

The article presents a tunable fibre optic dispersion compensator system, consisting of a specially designed cantilever beam and a uniform Bragg grating. It analyses the group delay and dispersion characteristics in the case that there is no apodization of the grating and also for a grating with apodization used for modulation of the refractive index. Various apodization parameters were tested, along with their effects on the dispersion characteristics of the entire system properties. It is demonstrated in the paper that the apodization parameter affects the compensator’s group delay characteristic. The finite elements method was used to design a compensator of such a shape that enabled chirp to be induced in a grating of a specified shape. A new design is presented for the system, in which the dispersion properties are tuned by the maximum value of the heterogeneous deformation of the compensator. The paper also includes results showing the effect of the maximum value of heterogeneous stress of the grating on the dispersion characteristics of the proposed construction.

4

Kompensacja dyspersji chromatycznej w systemach światłowodowych

Rudnicki M.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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1998

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nr 1

23-27

PL

Przedstawiono przyczyny powstawania dyspersji chromatycznej i jej wpływ na ograniczanie przepływności i pasma oraz sposoby kompensacji dyspersji w systemach światłowodowych. Opisano kompensatory z siatkami Bragga: układ z cyrkulatorem optycznym i interferometrem Macha-Zehndera. Zaprezentowano system o przepływności 40Gbit/s firmy MCI Corp. z kompensacją dyspensji przy użyciu układów z siatkami Bragga.

EN

The article presents the causes of the dispersion and its influence on a bitrate and abandwidth limitation, as well as the means of the dispersion compensation in the optical fiber systems. The compensators with Bragg gratings: a circuit unit with optical circulator and Mach-Zehnder interferometer are described MCI Corporation 40 Gbit/s system with dispersion compensation using circuits with Bragg grating is presented.