IEC 61300-2-39:1997 pdf download.Fibre optic interconnecting devices and passive components – Basic test and measurement procedures
1 General
1 .1 Scope and object
This part of IEC 1 300 describes the test to measure a component’s susceptibility to a change in
optical performance when an external magnetic field is exerted on it.
1 .2 Normative reference
The following normative document contains provisions which, through reference in this text,
constitute provisions of this part of IEC 1 300. At the time of publication, the edition indicated
was valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 1 300 are encouraged to investigate the possibility of applying the most
recent edition of the normative document indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 1 300-1 : 1 995, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 1 : General and guidance
2 General description
The test should be performed in a laboratory shielded from external magnetic fields or where
the ambient magnetic intensity and direction are known.
As the direction of an external magnetic field is indeterminate with respect to the direction of a
component in an actual system, it is essential to specify measurement procedures which can
control both the intensity and direction of the external magnetic field being exerted on the
component.
For the purpose of simplifying the illustration, this procedure only gives a measuring method for
configuration A devices, i.e. devices containing integral fibre optic pigtails without connectors
(as specified in the generic specifications).
3 Apparatus
The apparatus consists of the following elements:
3.1 Source S
This unit consists of an optical emitter, its fibre pigtail (if any), and associated drive electronics.
It may include mechanical or electrical modulation of the optical power. It could, for example,
be a laser or a spectrally broadband source combined with an interference filter or
monochromator. The precise characteristics shall be compatible with the measurement
requirements, and shall be specified in the detail specification, including:
– power output;
– peak wavelength;
– spectral width;
– coherent or incoherent;
– power output stability;
– pigtail fibre type (if any).
3.2 Excitation unit E
This unit consists of a passive optical system which transmits the optical power to the
component with the required launch conditions. Unless otherwise specified, the launch
conditions shall be in accordance with annex B of IEC 1 300-1 . It shall be compatible with the
component being measured, and shall be specified in the detail specification.
3.3 Detector D
This unit consists of an optical detector, its fibre pigtail (if any), and associated detection
electronics. The detector element, or the core of the fibre which is pigtailed to it, shall have a
diameter and acceptance angle which is equal to or exceeds respectively the maximum core
diameter and numerical aperture of the fibre on the component output. The precise
characteristics shall be compatible with the measurement requirements, and shall be specified
in the detail specification, including:
– maximum sensitivity;
– linearity;
– peak and range of wavelength sensitivity;
– amount of power reflected;
– range of wavelength sensitivity;
– stability;
– pigtail fibre type (if any).
3.4 Temporary joint TJ
This is a method, device, or mechanical fixture for temporarily aligning two fibre ends into a
reproducible, low loss joint. It may, for example, be a precision v-groove vacuum chuck,
micromanipulator, or a fusion or mechanical splice. A suitable refractive index matching
material shall preferably be used. The stability of the temporary joint shall be compatible with
the measurement precision required.
3.5 Fibre lengths L 1 , L 2
Where fibre lengths are indicated in the illustrations accompanying the test methods in this
standard, these lengths shall be specified in the detail specification.
IEC 61300-2-39:1997 pdf download
