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 |
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 |
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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 |