IEC TR 61282-8:2006 PDF

Name: IEC TR 61282-8:2006 — Fibre optic communication system design guides - Part 8: Calculating dispersion penalty from measured time-resolved chirp data
SKU: IEC TR 61282-8:2006
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Fibre optic communication system design guides - Part 8: Calculating dispersion penalty from measured time-resolved chirp data

Название (английский):

IEC TR 61282-8:2006

Fibre optic communication system design guides - Part 8: Calculating dispersion penalty from measured time-resolved chirp data

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 20
Дата публикации:: 15 ноября 2006 г.
Издание:: IEC TR 61282 edition 1 version 1
ICS:: 33.180.01

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Описание (английский):

This part of IEC 61282 provides definitions of dispersion penalty and other related penalties. It describes the direct measurement of these penalties using a BER test set and the calculation of the penalties from time-resolved chirp (TRC) data. Annex A provides the theory for power penalty calculations.

Abstract

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Упомянутые в описании и другие стандарты IEC

Overview

IEC TR 61282-8:2006 - "Fibre optic communication system design guides - Part 8: Calculating dispersion penalty from measured time‑resolved chirp data" - defines dispersion‑related power penalties for laser transmitters and describes two complementary approaches:

direct measurement of power (dispersion) penalty using a BER test set, and

calculation of dispersion penalty from time‑resolved chirp (TRC) measurements.

The report targets single longitudinal mode (SLM) laser transmitters used in telecommunications at 2.5 Gbit/s and higher with NRZ modulation. It explains required measurements, calculation steps, and the theoretical basis for power‑penalty analysis (see informative Annex A).

Key topics and requirements

Definitions: Formalizes dispersion penalty, transmitter and dispersion penalty (TDP), and total transmitter power penalty as shifts in BER-versus-received‑power curves between reference and impaired conditions.

Measurement methods:

Direct BER measurement using a BER test set and the equipment setup illustrated in the report (PRBS source, transmitter under test, fibre spool, variable optical attenuator, receiver, optical power meter).
TRC measurements per IEC 61280‑2‑10 that yield instantaneous optical power P(t) and instantaneous frequency Δf(t) for PRBS stimuli.

Calculation procedure: Step‑by‑step guidance to compute BER for specified conditions from TRC data, then derive dispersion penalty values. Annex A provides the underlying theory for converting BER vs. received power (or OSNR) into power penalties.

Scope limits: Applicable to SLM lasers (e.g., DFB lasers, DFB with EA or external modulators). Not suitable for multi‑longitudinal‑mode (MLM) lasers or LEDs. Results depend on the specified fibre dispersion and receiver characteristics, which must be reported with test results.

Practical note: TRC‑based calculations can be significantly faster than full BER sweeps because they avoid long BER‑versus‑power measurements over wide dynamic ranges.

Applications and users

Laser and transceiver designers validating transmitter performance against dispersion budgets.

Test engineers performing transmitter characterization and production verification.

Systems engineers predicting link sensitivity and assessing transmitter suitability for specified fibre types and distances.

Standards committees and test labs that need a repeatable method to relate laser chirp to chromatic‑dispersion‑induced penalties.

Related standards

IEC 61280‑2‑10 (Time‑resolved chirp and alpha‑factor measurement)

IEC 61280‑2‑8 (Determination of low BER using Q‑factor measurements)

ITU‑T G.957 (Optical interfaces for SDH equipment)

Keywords: IEC TR 61282‑8:2006, dispersion penalty, time‑resolved chirp (TRC), BER test set, fibre optic transmitter, SLM lasers, NRZ, DFB, power penalty.

IEC TR 61282-8:2006 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

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