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BS EN 61280-1-3:2010

BS EN 61280-1-3:2010

$102.76

Fibre optic communication subsystem test procedures – General communication subsystems. Central wavelength and spectral width measurement

Published By Publication Date Number of Pages
BSI 2010 22
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This part of IEC 61280 provides definitions and measure 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.

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 may be appropriate to different spectral types, such as continuous spectra characteristic of light-emitting diodes (LEDs), and multilongitudinal-mode (MLM), multitransverse-mode (MTM) and single-longitudinal mode (SLM) spectra, characteristic of laser diodes (LDs).

PDF Catalog

PDF Pages PDF Title
6 CONTENTS
7 1 Scope
2 Normative references
3 Terms and definitions
3.1 Wavelength
8 3.2 Spectral width
3.3 Additional spectral characteristics
4 Apparatus
4.1 Calibrated optical spectrum analyzer
9 4.2 Power supplies
4.3 Input signal source or modulator
4.4 Test cord
5 Test sample
6 Procedure (Method A)
6.1 General
6.2 Setup
10 6.3 Adjustment of spectrum analyzer controls
7 Procedure (Method B)
7.1 Setup
11 7.2 Adjustment of spectrum analyzer controls
7.3 Continuous LED and SLM spectra
7.4 Discrete MLM spectra
12 7.5 Continuous SLM spectra
8 Calculation
8.1 General
8.2 Centre wavelength
8.3 Centroidal wavelength
13 8.4 Peak wavelength
8.5 RMS spectral width (Δλrms)
8.6 n-dB spectral width (Δλn-dB)
8.7 Full-width half-maximum spectral width (Δλfwhm)
14 8.8 Side-mode suppression ratio (SMSR)
9 Test results
9.1 Required information
9.2 Information to be available on request
10 Example results
15 Figures
Figure 1 – Example of a LED optical spectrum
Table 1 – Measurement points for LED spectrum from Figure 1
16 Table 2 – RMS spectral characterization
17 Figure 2 – Typical spectrum analyzer output for an MLM laser
18 Figure 3 – Δλfwhm spectral width measurement for MLM laser
Figure 4 – Δλfwhm spectral width calculation for MLM laser
19 Figure 5 – Peak emission wavelength and Δλ30–dB measurement for SLM laser

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BS EN 61280-1-3:2010
$102.76