This part of IEC 62627, which is a Technical Report, describes two methods used to measure the blocking characteristics of adaptors with an optical power blocking shutter. This document focuses on singlemode fibre (SMF) and two wavelengths, 1 310 nm and 1 550 nm.<\/p>\n
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| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions 4 Background to the measurement method of blocking characteristics for adaptors with an optical power blocking shutter 4.1 Laser safety requirement for optical fibre communication systems <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4.2 Required performance of the power blocking shutter 4.3 Standard measurement conditions used to determine laser safety for optical fibre communication systems 5 Measurement methods used in this Technical Report 5.1 Background 5.2 Test 5.2.1 Measurement set-up <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 5.2.2 Study of dynamic range 5.2.3 Light source and optical detector Figures Figure 1 \u2013 Example of measurement set-up for Method 1 Figure 2 \u2013 Example of measurement set-up for Method 2 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.2.4 Measurement environment 5.3 Measurement of the maximum emitted optical power 5.4 Measuring system dynamic range 5.5 Measuring the level of optical power blocking <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6 Demonstration of measurement 6.1 Common measurement conditions 6.2 Measurement set-up 6.2.1 Method 1 Tables Table 1 \u2013 Common measurement conditions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Table 2 \u2013 Details of apparatus used for Method 1 <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 6.2.2 Method 2 Figure 3 \u2013 Measurement set-up, Method 1 <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.3 Dynamic range 6.3.1 Method 1 Figure 4 \u2013 Measurement set-up, Method 2 Table 3 \u2013 Details of apparatus used for Method 2 <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 6.3.2 Method 2 6.3.3 Samples measured 6.4 Measurement results Table 4 \u2013 Adaptors with an optical power blocking shutter <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure 5 \u2013 Comparison between average of optical power blocking and the standard deviations (Type SC, wavelength of 1 310 nm) Figure 6 \u2013 Comparison between average of optical power blocking and the standard deviations (Type SC, wavelength of 1 550 nm) <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.5 Study of the factors affecting measurement uncertainty Figure 7 \u2013 Comparison between average of optical power blocking and the standard deviations (Type LC, wavelength of 1 310 nm) Figure 8 \u2013 Comparison between average of optical power blocking and the standard deviations (Type LC, wavelength of 1 550 nm) <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 7 Summary <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Annex A (informative) Observation of emitted light using a visible light source Figure A.1 \u2013 Example of off-axis emitted visible light (Type LC duplex adaptor with an optical power blocking shutter) <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Annex B (informative) Detailed measured levels of blocking characteristics (Measured values of light quantity shielded by adaptors with an optical power blocking shutter) Table B.1 \u2013 Measured values of optical power blocking(Type SC, measured wavelength of 1 310 nm) <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Table B.2 \u2013 Measured values of optical power blocking (Type SC, measured wavelength of 1 550 nm) Table B.3 \u2013 Measured values of optical power blocking (Type LC, measured wavelength of 1 310 nm) for non-angled PC end face <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Table B.4 \u2013 Measured values of optical power blocking (Type LC, measured wavelength of 1 310 nm) for 8 degree-angled PC end face Table B.5 \u2013 Measured values of optical power blocking (Type LC, measured wavelength of 1 550 nm) for non-angled PC end face <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table B.6 \u2013 Measured values of optical power blocking (Type LC, measured wavelength of 1 550 nm) for 8 degree-angled PC end face <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Fibre optic interconnecting devices and passive components – Study of optical power blocking measurement methods for adaptors with an optical power blocking shutter<\/b><\/p>\n |