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ldef fiber optic exposure experimentTen fiber optic cable samples of different types were exposed in low Earth orbit for over 5.5 years on the Long Duration Exposure Facility (LDEF). Four of the samples were mounted externally, and the remaining six were internal, under approximately .5 gc/sq m of aluminum. The experiment was recovered in January of 1990, and laboratory evaluation of the effects of the exposure has continued since. An increase in loss, presumed to be from radiation darkening, aging effects on polymer materials used in cabling, unique contamination effects on connector terminations, and micrometeoroid impacts were observed on some of the samples. In addition, the dependence of sample loss was measured as a function of temperature before and after the flight. All cable samples were functional, and the best exhibited no measurable change in performance, indicating that conventional fiber optic cables can perform satisfactorily in spacecraft. Experimental results obtained to date will be presented and discussed.
Document ID
19910015766
Document Type
Conference Paper
Authors
Johnston, Alan R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bergman, Larry A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hartmayer, Ron
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Langley Research Center, First LDEF Post-Retrieval Symposium Abstracts
Subject Category
OPTICS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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