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ASTM E1614-94(2013)

(Guide)

Standard Guide for Procedure for Measuring Ionizing Radiation-Induced Attenuation in Silica-Based Optical Fibers and Cables for Use in Remote Fiber-Optic Spectroscopy and Broadband Systems

Standard Guide for Procedure for Measuring Ionizing Radiation-Induced Attenuation in Silica-Based Optical Fibers and Cables for Use in Remote Fiber-Optic Spectroscopy and Broadband Systems

SIGNIFICANCE AND USE
4.1 Ionizing environments will affect the performance of optical fibers/cables being used to transmit spectroscopic information from a remote location. Determination of the type and magnitude of the spectral attenuation or interferences, or both, produced by the ionizing radiation in the fiber is necessary for evaluating the performance of an optical fiber sensor system.  
4.2 The results of the test can be utilized as a selection criteria for optical fibers used in optical fiber spectroscopic sensor systems. Note 1—The attenuation of optical fibers generally increases when exposed to ionizing radiation. This is due primarily to the trapping of radiolytic electrons and holes at defect sites in the optical materials, that is, the formation of color centers. The depopulation of these color centers by thermal and/or optical (photobleaching) processes, or both, causes recovery, usually resulting in a decrease in radiation-induced attenuation. Recovery of the attenuation after irradiation depends on many variables, including the temperature of the test sample, the composition of the sample, the spectrum and type of radiation employed, the total dose applied to the test sample, the light level used to measure the attenuation, and the operating spectrum. Under some continuous conditions, recovery is never complete.
SCOPE
1.1 This guide covers a method for measuring the real time, in situ radiation-induced spectral attenuation of multimode, step index, silica optical fibers transmitting unpolarized light. This procedure specifically addresses steady-state ionizing radiation (that is, alpha, beta, gamma, protons, etc.) with appropriate changes in dosimetry, and shielding considerations, depending upon the irradiation source.  
1.2 This test procedure is not intended to test the balance of the optical and non-optical components of an optical fiber-based system, but may be modified to test other components in a continuous irradiation environment.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Dec-2012
ICS
33.180.10 - Fibres and cables
Technical Committee
E13 - Molecular Spectroscopy and Separation Science
Drafting Committee
E13.09 - Fiber Optics, Waveguides, and Optical Sensors
Current Stage
Ref Project

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ASTM E1614-94(2013) - Standard Guide for Procedure for Measuring Ionizing Radiation-Induced Attenuation in Silica-Based Optical Fibers and Cables for Use in Remote Fiber-Optic Spectroscopy and Broadband SystemsASTM E1614-94(2013) - Standard Guide for Procedure for Measuring Ionizing Radiation-Induced Attenuation in Silica-Based Optical Fibers and Cables for Use in Remote Fiber-Optic Spectroscopy and Broadband Systems
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ASTM E1614-94(2013) - Standard Guide for Procedure for Measuring Ionizing Radiation-Induced Attenuation in Silica-Based Optical Fibers and Cables for Use in Remote Fiber-Optic Spectroscopy and Broadband Systems
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E1614 − 94 (Reapproved 2013)
Standard Guide for
Procedure for Measuring Ionizing Radiation-Induced
Attenuation in Silica-Based Optical Fibers and Cables for
Use in Remote Fiber-Optic Spectroscopy and
1
Broadband Systems
This standard is issued under the fixed designation E1614; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope 2.3 EIA Standards:
EIA-455-57Optical Fiber End Preparation and Examination
1.1 This guide covers a method for measuring the real time,
EIA-455-64ProcedureforMeasuringRadiation-InducedAt-
in situ radiation-induced spectral attenuation of multimode,
tenuation in Optical Fibers and Cables
step index, silica optical fibers transmitting unpolarized light.
EIA-455-78A-90Spectral Attenuation Cutback Measure-
This procedure specifically addresses steady-state ionizing
ment for Single-Mode Optical Fibers
radiation (that is, alpha, beta, gamma, protons, etc.) with
appropriatechangesindosimetry,andshieldingconsiderations,
3. Terminology
depending upon the irradiation source.
3.1 Definitions:
1.2 This test procedure is not intended to test the balance of
3.1.1 Refer to MIL-STD-2196 for the definition of terms
the optical and non-optical components of an optical fiber-
used in this guide.
basedsystem,butmaybemodifiedtotestothercomponentsin
a continuous irradiation environment.
4. Significance and Use
1.3 The values stated in SI units are to be regarded as
4.1 Ionizing environments will affect the performance of
standard. No other units of measurement are included in this
optical fibers/cables being used to transmit spectroscopic
standard.
information from a remote location. Determination of the type
and magnitude of the spectral attenuation or interferences, or
1.4 This standard does not purport to address all of the
both, produced by the ionizing radiation in the fiber is
safety concerns, if any, associated with its use. It is the
necessary for evaluating the performance of an optical fiber
responsibility of the user of this standard to establish appro-
sensor system.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4.2 The results of the test can be utilized as a selection
criteria for optical fibers used in optical fiber spectroscopic
2. Referenced Documents
sensor systems.
2.1 Test or inspection requirements include the following
NOTE 1—The attenuation of optical fibers generally increases when
references:
exposed to ionizing radiation. This is due primarily to the trapping of
2
radiolytic electrons and holes at defect sites in the optical materials, that
2.2 Military Standard:
is, the formation of color centers. The depopulation of these color centers
MIL-STD-2196-(SH)Glossary of Fiber Optic Terms
by thermal and/or optical (photobleaching) processes, or both, causes
recovery, usually resulting in a decrease in radiation-induced attenuation.
Recovery of the attenuation after irradiation depends on many variables,
including the temperature of the test sample, the composition of the
1
This guide is under the jurisdiction of ASTM Committee E13 on Molecular
sample, the spectrum and type of radiation employed, the total dose
Spectroscopy and Separation Science and is the direct responsibility of Subcom-
applied to the test sample, the light level used to measure the attenuation,
mittee E13.09 on Fiber Optics, Waveguides, and Optical Sensors.
and the operating spectrum. Under some continuous conditions, recovery
Current edition approved Jan. 1, 2013. Published January 2013. Originally
is never complete.
approved in 1994. Last previous edition approved in 2004 as E1614 – 94 (2004).
DOI: 10.1520/E1614-94R13.
2
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.Available from Stan-
3
dardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Available from Electronic Industries Alliance (EIA), 2500 Wilson Blvd.,
Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil. Arlington, VA 22201, http://www.ecaus.org/eia.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1614 − 94 (2013)
5. Apparatus 5.7 Optical Splitter—An optical splitter or fiber optic cou-
pler shall divert some portion of the input light to a reference
5.1 ThetestschematicisshowninFig.1.Thefollowinglist
detector for monitoring the stability of the light source.
identifies the equipment necessary to accomplish this test
procedure. 5.8 Optical Interconnec
...

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4.1 Ionizing environments will affect the performance of optical fibers/cables being used to transmit spectroscopic information from a remote location. Determination of the type and magnitude of the spectral variations or interferences produced by the ionizing radiation in the fiber, or both, is necessary for evaluating the performance of an optical fiber sensor system.  
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SIGNIFICANCE AND USE
4.1 Ionizing environments will affect the performance of optical fibers/cables being used to transmit spectroscopic information from a remote location. Determination of the type and magnitude of the spectral attenuation or interferences, or both, produced by the ionizing radiation in the fiber is necessary for evaluating the performance of an optical fiber sensor system.  
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4.1 Ionizing environments will affect the performance of optical fibers/cables being used to transmit spectroscopic information from a remote location. Determination of the type and magnitude of the spectral variations or interferences produced by the ionizing radiation in the fiber, or both, is necessary for evaluating the performance of an optical fiber sensor system.  
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SIGNIFICANCE AND USE
4.1 Ionizing environments will affect the performance of optical fibers/cables being used to transmit spectroscopic information from a remote location. Determination of the type and magnitude of the spectral attenuation or interferences, or both, produced by the ionizing radiation in the fiber is necessary for evaluating the performance of an optical fiber sensor system.  
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