IEC TR 61282-5:2019

Fibre optic communication system design guidelines - Part 5: Accommodation and compensation of chromatic dispersion

IEC TR 61282-5:2019 which is a Technical Report, describes various techniques for accommodation and compensation of chromatic dispersion in fibre optic communication systems. These techniques include dispersion compensation with passive optical components, advanced dispersion management, and electronic accommodation of dispersion in the transmitters and receivers. This second edition cancels and replaces the first edition, published in 2002, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) extends the application space for dispersion compensation and accommodation to communication systems that employ non-zero dispersion-shifted fibres;
b) adds a discussion on the suitability of fibre types for long-haul transmission of wavelength-multiplexed signals;
c) updates the dispersion coefficient limits for dispersion-unshifted fibres;
d) adds information on the dispersion coefficients of dispersion-shifted fibres;
e) updates the naming of the fibre types to the revised naming conventions defined in IEC 60793-2-50:2018;
f) updates Table 2 to include the dispersion tolerance of phase-shift-keyed modulation formats used for the transmission of 40 Gbit/s and 100 Gbit/s signals;
g) adds information on dispersion management in terrestrial and submarine communication systems;
h) extends the description of passive dispersion compensators based on fibre Bragg gratings and etalons;
i) adds information on electronic dispersion accommodation in coherent communication systems (including transmitters and receivers);
j) updates the description of optical accommodation techniques to include soliton transmission and mid-span spectral inversion;
k) extends the list of system parameters for passive dispersion compensators to include wavelength-dependent loss, phase ripple, and latency;
l) updates the description of dispersion compensator applications in long-haul communication systems.
Keywords: chromatic dispersion

General Information

• Status: Published
• Publication Date: 16-Jul-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.180.01 - Fibre optic systems in general
• Technical Committee: SC 86C - Fibre optic systems and active devices
• Drafting Committee: WG 1 - TC 86/SC 86C/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 08-Aug-2019
• Completion Date: 17-Jul-2019

Relations

• Revises: IEC TR 61282-5:2002 - Fibre optic communication system design guides - Part 5: Accommodation and compensation of dispersion
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TR 61282-5 ®
Edition 2.0 2019-07
TECHNICAL
REPORT
Fibre optic communication system design guidelines –
Part 5: Accommodation and compensation of chromatic dispersion

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IEC TR 61282-5 ®
Edition 2.0 2019-07
TECHNICAL
REPORT
Fibre optic communication system design guidelines –

Part 5: Accommodation and compensation of chromatic dispersion

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.01 ISBN 978-2-8322-7131-5

– 2 – IEC TR 61282-5:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Background . 7
5 Impact of chromatic dispersion . 8
5.1 Dependence on fibre type . 8
5.2 Dispersion-unshifted fibres . 8
5.3 Dispersion-shifted fibres . 10
5.4 Pulse broadening . 11
5.5 Pulse narrowing and signal peaking . 13
5.6 Dispersion-limited transmission distance . 14
6 Compensation and accommodation of dispersion . 16
6.1 Passive dispersion compensation along the optical path . 16
6.1.1 General . 16
6.1.2 Dispersion compensating fibre . 16
6.1.3 Chirped fibre Bragg grating . 17
6.1.4 Etalon filter . 18
6.2 Dispersion management . 18
6.3 Accommodation of dispersion . 20
6.4 Pre-distortion of the transmitted signal . 20
6.5 Electrical accommodation in the receiver . 21
6.6 Dispersion-assisted transmission . 22
6.7 Mid-span spectral inversion . 23
7 Passive dispersion compensator parameters . 24
7.1 Compensated fibre length . 24
7.2 Operating wavelength range . 24
7.3 Chromatic dispersion . 24
7.4 Dispersion slope . 25
7.5 Insertion loss . 25
7.6 Wavelength-dependent loss . 25
7.7 Phase ripple . 26
7.8 Reflectance . 26
7.9 Polarization-mode dispersion . 26
7.10 Polarization-dependent loss . 27
7.11 Optical nonlinearity . 27
7.12 Latency . 27
8 Passive dispersion compensator applications . 28
8.1 Unamplified fibre spans . 28
8.2 Fibre links with in-line optical amplifiers . 28
8.3 Multi-channel WDM transmission systems . 29
8.4 Hybrid transmission systems . 30
8.5 Multi-band WDM transmission systems . 30

9 System parameters for passive dispersion compensators . 30
Bibliography . 32

Figure 1 – Range of the dispersion coefficient for B-652.D fibres . 9
Figure 2 – Distortions in a 10 Gbit/s NRZ signal at various amounts of CD . 14
Figure 3 – Summing the dispersions of a B-652 fibre and a DCF over the C-band . 17
Figure 4 – Reflectivity and time delay of an FBG-based PDC . 18
Figure 5 – Periodic dispersion map with span-by-span compensation . 19
Figure 6 – Transmitter for generating pre-compensated optical signals . 21
Figure 7 – Coherent optical receiver with electrical CD post-compensation . 22
Figure 8 – Spectral inversion of a modulated signal via four-wave mixing . 23
Figure 9 – Passive dispersion compensators placed at the receiver . 28
Figure 10– PDCs placed before optical booster amplifiers at the transmitter . 28
Figure 11 – PDCs placed after pre-amplifiers at the receiver. 28
Figure 12 – Optically amplified link with in-line PDCs . 29
Figure 13 – Optically amplified WDM communication link with in-line PDCs . 29
Figure 14 – WDM link with individual compensation of residual dispersion . 30
Figure 15 – Two-band WDM link with OA and PDC in the C-band . 30

Table 1 – Single-mode fibre types and range of dispersion coefficients at 1 550 nm . 11
Table 2 – Dispersion-limited transmission distances over B-652 fibre at 1 550 nm . 15
Table 3 – Primary system parameters for DCF-based PDCs . 31
Table 4 – Primary system parameters for FBG-based PDCs . 31

– 4 – IEC TR 61282-5:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC COMMUNICATION SYSTEM DESIGN GUIDELINES –

Part 5: Accommodation and compensation of chromatic dispersion

FOREWORD
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