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BS EN IEC 61280-1-3:2021

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Fibre optic communication subsystem test procedures – General communication subsystems. Measurement of central wavelength, spectral width and additional spectral characteristics

Published By Publication Date Number of Pages
BSI 2021 28
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This part of IEC 61280 provides definitions and measurement procedures for several wavelength and spectral width properties of an optical spectrum associated with a fibre optic communication subsystem, an optical transmitter, or other light sources used in the operation or test of communication subsystems. This document also provides definitions and measurement procedures for side-mode suppression ratio and signal-to-source spontaneous emission ratio.

The measurement is done for the purpose of system construction and/or maintenance. In the case of communication subsystem signals, the optical transmitter is typically under modulation.

NOTE Different properties can be appropriate to different spectral types, such as continuous spectra characteristics of light-emitting diodes (LEDs), as well as multilongitudinal-mode (MLM), multitransverse-mode (MTM) and single-longitudinal mode (SLM) spectra, which are characteristic of laser diodes (LDs).

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Wavelength
12 3.2 Spectral width
3.3 Additional spectral characteristics
13 3.4 Abbreviated terms
4 Apparatus
4.1 Calibrated optical spectrum analyzer (OSA)
4.2 Calibrated optical wavelength meter (OWM)
14 4.3 Power supplies
4.4 Input signal source or modulator
4.5 Test cord
5 Test sample
6 Procedure (method A)
6.1 General
15 6.2 Setup
6.3 Adjustment of spectrum analyzer controls
16 6.4 Setting of optical wavelength meter
7 Procedure (method B)
7.1 Setup
7.2 Adjustment of spectrum analyzer controls
7.3 Setting of optical wavelength meter
17 7.4 Continuous LED and SLM spectra
7.5 Discrete MLM spectra
7.6 SLM spectra
18 8 Calculation
8.1 General
8.2 Centre wavelength
8.2.1 Continuous LED spectra
8.2.2 Discrete MLM spectra
8.3 Centroidal wavelength
19 8.4 Peak wavelength
8.4.1 Continuous LED and SLM spectra
8.4.2 Discrete MLM spectra
8.5 RMS spectral width (Δλrms)
8.6 n-dB-down spectral width (Δλn-dB)
8.7 Full-width at half-maximum spectral width (Δλfwhm)
8.7.1 Continuous LED spectra
20 8.7.2 Discrete MLM spectra
8.8 Side-mode suppression ratio (SMSR)
8.9 Signal-to-source spontaneous emission ratio (SSER)
9 Test results
9.1 Required information
21 9.2 Information to be available on request
10 Examples of results
Figure 1 – Example of a LED optical spectrum
22 Table 1 – Measurement points for LED spectrum from Figure 1
Table 2 – RMS spectral characterization
23 Figure 2 – Typical spectrum analyzer output for MLM laser
Figure 3 – Δλfwhm spectral width measurement for MLM laser
24 Figure 4 – Δλfwhm spectral width calculation for MLM laser
Figure 5 – Peak emission wavelength and Δλ30-dB measurement for SLM laser
25 Figure 6 – Resolution bandwidth (RBW) dependence of SMSR for SLM laser
Figure 7 – Signal-to-source spontaneous emission ratio measurement for SLM laser
26 Bibliography
BS EN IEC 61280-1-3:2021
$142.49