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ASTM E1654-94(2013)

(Guide)

Standard Guide for Measuring Ionizing Radiation-Induced Spectral Changes in Optical Fibers and Cables for Use in Remote Raman FiberOptic Spectroscopy

Standard Guide for Measuring Ionizing Radiation-Induced Spectral Changes in Optical Fibers and Cables for Use in Remote Raman FiberOptic Spectroscopy

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 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.  
4.2 The results of the test can be utilized as a selection criteria for optical fibers used in optical fiber Raman spectroscopic sensor systems.Note 1—The attenuation of optical fibers generally increases when they are 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 or optical (photobleaching) processes, or both, causes recovery, usually resulting in a decrease in radiationinduced 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 the method for measuring the real time, in situ radiation-induced alterations to the Raman spectral signal transmitted by a multimode, step index, silica optical fiber. This guide 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 The test procedure given in this guide is not intended to test the other optical and non-optical components of an optical fiber-based Raman sensor 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 E1654-94(2013) - Standard Guide for Measuring Ionizing Radiation-Induced Spectral Changes in Optical Fibers and Cables for Use in Remote Raman FiberOptic SpectroscopyASTM E1654-94(2013) - Standard Guide for Measuring Ionizing Radiation-Induced Spectral Changes in Optical Fibers and Cables for Use in Remote Raman FiberOptic Spectroscopy
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ASTM E1654-94(2013) - Standard Guide for Measuring Ionizing Radiation-Induced Spectral Changes in Optical Fibers and Cables for Use in Remote Raman FiberOptic Spectroscopy
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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:E1654 −94 (Reapproved 2013)
Standard Guide for
Measuring Ionizing Radiation-Induced Spectral Changes in
Optical Fibers and Cables for Use in Remote Raman
1
FiberOptic Spectroscopy
This standard is issued under the fixed designation E1654; 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.
1. Scope EIA-455-57Optical Fiber End Preparation and Examination
EIA-455-64 Procedure for Measuring Radiation-Induced
1.1 This guide covers the method for measuring the real
Attenuation in Optical Fibers and Cables
time,insituradiation-inducedalterationstotheRamanspectral
4
2.3 Military Standards:
signal transmitted by a multimode, step index, silica optical
MIL-STD-2196-(SH)Glossary of Fiber Optic Terms
fiber. This guide specifically addresses steady-state ionizing
radiation (that is, alpha, beta, gamma, protons, etc.) with
3. Terminology
appropriatechangesindosimetry,andshieldingconsiderations,
3.1 Definitions—Refer to the following documents for the
depending upon the irradiation source.
definition of terms used in this guide: MIL-STD-2196-(SH)
1.2 The test procedure given in this guide is not intended to
and Guide E1614.
test the other optical and non-optical components of an optical
fiber-based Raman sensor system, but may be modified to test 4. Significance and Use
other components in a continuous irradiation environment.
4.1 Ionizing environments will affect the performance of
1.3 The values stated in SI units are to be regarded as
optical fibers/cables being used to transmit spectroscopic
standard. No other units of measurement are included in this
information from a remote location. Determination of the type
standard.
and magnitude of the spectral variations or interferences
produced by the ionizing radiation in the fiber, or both, is
1.4 This standard does not purport to address all of the
necessary for evaluating the performance of an optical fiber
safety concerns, if any, associated with its use. It is the
sensor system.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.2 The results of the test can be utilized as a selection
bility of regulatory limitations prior to use.
criteria for optical fibers used in optical fiber Raman spectro-
scopic sensor systems.
2. Referenced Documents
2
NOTE 1—The attenuation of optical fibers generally increases when
2.1 ASTM Standards:
theyareexposedtoionizingradiation.Thisisdueprimarilytothetrapping
E1614 Guide for Procedure for Measuring Ionizing
ofradiolyticelectronsandholesatdefectsitesintheopticalmaterials,that
Radiation-Induced Attenuation in Silica-Based Optical
is, the formation of color centers.The depopulation of these color centers
Fibers and Cables for Use in Remote Fiber-Optic Spec-
by thermal or optical (photobleaching) processes, or both, causes
troscopy and Broadband Systems recovery, usually resulting in a decrease in radiationinduced attenuation.
3
Recovery of the attenuation after irradiation depends on many variables,
2.2 EIA Standards:
including the temperature of the test sample, the composition of the
2.2.1Test or inspection requirements include the following
sample, the spectrum and type of radiation employed, the total dose
references:
applied to the test sample, the light level used to measure the attenuation,
and the operating spectrum. Under some continuous conditions, recovery
1
is never complete.
This guide is under the jurisdiction of ASTM Committee E13 on Molecular
Spectroscopy and Separation Science and is the direct responsibility of Subcom-
5. Apparatus
mittee E13.09 on Fiber Optics, Waveguides, and Optical Sensors.
Current edition approved Jan. 1, 2013. Published January 2013. Originally
5.1 ThetestschematicisshowninFig.1.Thefollowinglist
approved in 1994. Last previous version approved in 2004 as E1654–94 (2004).
identifies the equipment necessary to accomplish this test
DOI: 10.1520/E1654-94R13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
procedure.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4
the ASTM website. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
3
Available from Electronic Industries Alliance (EIA), 2500 Wilson Blvd., Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
Arlington, VA 22201, http://www.ecaus.org/eia. dodssp.daps.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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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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Note 1: The attenuation of optical fibers generally increases when they are 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 or optical (photobleaching) processes, or both, causes recovery, usually resulting in a decrease in radiationinduced 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.
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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 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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