IEC 61300-3-43:2009 PDF

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-43: Examinations and measurements - Mode transfer function measurement for fibre optic sources

First page of standard IEC 61300-3-43:2009

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Title (English):

IEC 61300-3-43:2009

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: January 22, 2009
Edition:: IEC IS 61300 edition 1 version 1
ICS:: 33.180.20

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Description (English):

IEC 61300-3-43:2009 describes the method for measuring the mode transfer function (MTF) to be used in characterising the launch conditions for measurements of attenuation and or return loss of multimode passive components. The MTF may be measured at the operational wavelengths. This standard cancels and replaces IEC/PAS 61300-3-43, published in 2006. This first edition constitutes a technical revision.

Technical details

Technical committee: SC 86B - Fibre optic interconnecting devices and passive components
SKU: IEC 61300-3-43:2009

Abstract

Overview

IEC 61300-3-43:2009 specifies a standardized method to measure the mode transfer function (MTF) of multimode fibre optic sources. The MTF measurement characterizes the launched modal distribution (LMD) - the mode content injected into multimode fibre - and is used to define launch conditions for accurate attenuation and return loss testing of multimode passive components. This first edition (2009) replaces IEC/PAS 61300-3-43 (2006) and is applicable at the operational wavelengths of the system under test.

Key topics and technical requirements

MTF definition and theory: MTF is derived from the fibre near-field intensity distribution. The standard describes the mathematical relation between the near-field intensity I(r) and the MTF, and how to express results as a normalised mode number (m/M).
Mode power distribution (MPD): MPD(m) = MTF(m) × m - used to show relative power across mode groups and identify dominant mode ranges.
Measurement constraints:
- Modes within a mode group must carry the same power and have random relative phases (mode-continuum approximation).
- Linewidth requirements to avoid speckle: for a 50 µm core, Δλ > ~0.5 nm at 850 nm and Δλ > ~1.0 nm at 1 300 nm (typical).
- If line-width is insufficient, temporal averaging (e.g., gentle fibre agitation) can be used; verify azimuthal symmetry by checking MTFs at 45° intervals.
- The MPD peak should occur at a normalised mode number

Related standards

Other IEC standards

Overview

Key topics and technical requirements

MTF definition and theory: MTF is derived from the fibre near-field intensity distribution. The standard describes the mathematical relation between the near-field intensity I(r) and the MTF, and how to express results as a normalised mode number (m/M).
Mode power distribution (MPD): MPD(m) = MTF(m) × m - used to show relative power across mode groups and identify dominant mode ranges.
Measurement constraints:
- Modes within a mode group must carry the same power and have random relative phases (mode-continuum approximation).
- Linewidth requirements to avoid speckle: for a 50 µm core, Δλ > ~0.5 nm at 850 nm and Δλ > ~1.0 nm at 1 300 nm (typical).
- If line-width is insufficient, temporal averaging (e.g., gentle fibre agitation) can be used; verify azimuthal symmetry by checking MTFs at 45° intervals.
- The MPD peak should occur at a normalised mode number

IEC 61300-3-43:2009 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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