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BS EN 61290-4-1:2011

BS EN 61290-4-1:2011

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Optical amplifiers. Test methods – Gain transient parameters. Two-wavelength method

Published By Publication Date Number of Pages
BSI 2011 26
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This part of IEC 61290-4 applies to erbium-doped fibre amplifiers (EDFAs) and optically amplified elementary sub-systems. It applies to OAs using active fibres (optical fibre amplifiers, OFAs), containing rare-earth dopants. These amplifiers are commercially available and widely deployed in service provider networks.

The object of this part of IEC 61290-4 is to provide the general background for EDFA transients and related parameters, and to describe a standard test method for accurate and reliable measurement of the following transient parameters:

  • Channel addition/removal transient gain overshoot and transient net gain overshoot

  • Channel addition/removal transient gain undershoot and transient net gain undershoot

  • Channel addition/removal gain offset

  • Channel addition/removal transient gain response time constant (settling time)

PDF Catalog

PDF Pages PDF Title
6 English

CONTENTS
7 FOREWORD
9 INTRODUCTION
10 1 Scope and object
2 Normative references
3 Terms, definitions and abbreviations
3.1 General
11 Figures

Figure 1 – Definitions of rise and fall times (a) in the case of a channel addition event, and (b) in the case of a channel removal event
12 Figure 2 – OFA transient gain response for (a) a channel removal event,and (b) a channel addition event
13 3.2 Terms and definitions
14 3.3 Abbreviated terms
15 4 Apparatus
5 Test specimen
6 Procedure
Figure 3 – Generic transient control measurement setup
16 7 Calculations
8 Test results
Tables

Table 1 – Examples of add and drop scenarios for transient control measurement
Table 2 – Typical results of transient control measurement
17 Annex A (informative) Background on transient phenomenon in optical amplifiers
18 Figure A.1 – EDFA pump control for a chain of 5 EDFAs and 4 fibre spans
19 Figure A.2 – EDFA spectral hole depth for different gain compression
Figure A.3 – EDFA spectral hole depth for different wavelengths
20 Annex B (informative) Slew rate effect on transient gain response
21 Figure B.1 – Transient gain response at various slew rates
Table B.1 – Transient gain response for various rise time and fall time (16 dB add/drop)
22 Figure B.2 – 16 dB add/drop (rise time = 10 usec)

Figure B.3 – 16 dB add/drop (rise time = 1 000 usec
)
23 Bibliography

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BS EN 61290-4-1:2011
$142.49