IEC 61315:2019 is available as \/2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61315:2019 is applicable to instruments measuring radiant power emitted from sources that are typical for the fibre-optic communications industry. These sources include laser diodes, light emitting diodes (LEDs) and fibre-type sources. Both divergent and collimated radiations are covered. This document defines the calibration of power meters to be performed by calibration laboratories or by power meter manufacturers. This third edition cancels and replaces the second edition published in 2005. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) update of terms and definitions; b) update of 5.1, including Table 1 (new type of source); c) update of Annex A; d) addition of Annex B on dB conversion. Keywords: Fibre-optic power meters<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figures Figure 1 \u2013 Typical spectral responsivity of photoelectric detectors <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure 2 \u2013 Example of a traceability chain <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 4 Preparation for calibration 4.1 Organization 4.3 Advice for measurements and calibrations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 4.4 Recommendations to users 5 Absolute power calibration 5.1 Calibration methods Table 1 \u2013 Calibration methods and correspondent typical power <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.2 Establishing the calibration conditions Figure 3 \u2013 Measurement setup for sequential, fibre-based calibration Tables <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.3 Calibration procedure <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5.4 Calibration uncertainty 5.4.1 General 5.4.2 Uncertainty due to the setup <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.4.3 Uncertainty of the reference meter <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 5.4.4 Correction factors and uncertainty caused by the change of conditions <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Figure 4 \u2013 Change of conditions and uncertainty <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.4.5 Uncertainty due to the spectral bandwidths <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 5.5 Reporting the results <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 6 Measurement uncertainty of a calibrated power meter 6.1 Overview 6.2 Uncertainty at reference conditions 6.3 Uncertainty at operating conditions 6.3.1 General <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 6.3.2 Determination of dependences on conditions Figure 5 \u2013 Determining and recording an extension uncertainty <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 6.3.3 Ageing 6.3.4 Dependence on temperature 6.3.5 Dependence on the power level (nonlinearity) <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 6.3.6 Dependence on the type of fibre or on the beam geometry Figure 6 \u2013 Possible subdivision of the optical reference plane into 10 \u00d7 10 squares, for the measurement of the spatial response <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 6.3.7 Dependence on the connector-adapter combination <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 6.3.8 Dependence on wavelength <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 6.3.9 Dependence on spectral bandwidth 6.3.10 Dependence on polarization Figure 7 \u2013 Wavelength dependence of response due to Fabry-Perot type interference Figure 8 \u2013 Measurement setup of polarization dependent response <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 6.3.11 Other dependences 7 Nonlinearity calibration 7.1 General 7.2 Nonlinearity calibration based on superposition 7.2.1 General <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 7.2.2 Procedure Figure 9 \u2013 Nonlinearity calibration based on superposition <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 7.2.3 Uncertainties Table 2 \u2013 Nonlinearity <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 7.3 Nonlinearity calibration based on comparison with a calibrated power meter 7.3.1 General 7.3.2 Procedure Figure 10 \u2013 Measurement setup for nonlinearity calibration by comparison <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 7.3.3 Uncertainties 7.4 Nonlinearity calibration based on comparison with an attenuator 7.5 Calibration of power meter for high power measurement <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex A (normative) Mathematical basis for measurement uncertainty calculations A.1 General A.2 Type A evaluation of uncertainty <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | A.3 Type B evaluation of uncertainty A.4 Determining the combined standard uncertainty <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | A.5 Reporting <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Annex B (informative) Linear to dB scale conversion of uncertainties B.1 Definition of decibel B.2 Conversion of relative uncertainties <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Calibration of fibre-optic power meters<\/b><\/p>\n |