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Scope and application of Bi-directional EDFA for long distance optical transmissions

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F63839172%3A_____%2F20%3A10133326" target="_blank" >RIV/63839172:_____/20:10133326 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11355/113550P/Scope-and-application-of-Bi-directional-EDFA-for-long-distance/10.1117/12.2553474.full" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11355/113550P/Scope-and-application-of-Bi-directional-EDFA-for-long-distance/10.1117/12.2553474.full</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1117/12.2553474" target="_blank" >10.1117/12.2553474</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Scope and application of Bi-directional EDFA for long distance optical transmissions

  • Original language description

    Erbium-Doped Fibre Amplifiers (EDFAs) caused a boom in optical communications world by allowing further possibilities of optical amplification without any O-E-O conversions, also in long haul transmission with number of channels simultaneously with other advanced transmissions (sensing, precise time and frequency transfers, etc.). EDFAs are used as a booster, inline, and pre-amplifier in an optical transmission system providing gain for signals either in C- Band or L-Band, or their edge. When the EDFA is being pumped at certain wavelength, Er ion doped in the fibre absorbs the pump light heading to an excited state. Amplification is achieved by ion de-excitation via stimulated emission and such phenomena have been used since 1980s. Generally, unidirectional solutions in fibre pairs for transmissions are preferred in telco field, as technically easier. Yet, we have large experience with the costs of leased fibres, and often bidirectional transmission in single fibre means savings for fibre leasing [1], and also often enables more than sufficient capacity in National Research and Education Network (NREN) environment. [2] And, bidirectional solutions in single fibre provide benefits for very advanced services, mostly Time and Frequency (T&amp;F) transfers where only bidirectional transmission allows the highest precision. Single path bidirectional transmission is used in order to compensate thermal fluctuations, and provides the same length of both directions, which is crucial for T&amp;F service. In this paper, we propagate bidirectional transmission measuring specifically over 1570nm wavelength. In our project, the tunable laser uses more efficient technique to attain an ultra-stable frequency gain rather than using ubiquitous ways in the optical network services.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    10306 - Optics (including laser optics and quantum optics)

Result continuities

  • Project

    <a href="/en/project/EF16_013%2F0001797" target="_blank" >EF16_013/0001797: CESNET E-Infrastructure - Modernisation</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    MICRO-STRUCTURED AND SPECIALTY OPTICAL FIBRES VI

  • ISBN

    978-1-5106-3483-1

  • ISSN

    1996-756X

  • e-ISSN

  • Number of pages

    10

  • Pages from-to

    1-10

  • Publisher name

    SPIE Digital Library

  • Place of publication

    SPIE

  • Event location

    Online

  • Event date

    Apr 6, 2020

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article

    000576761300016