Accession Number : ADP005227

Title :   Development of Optical Fiber for Liquid Helium Temperature (4.2 K),

Corporate Author : SUMITOMO ELECTRIC INDUSTRIES LTD YOKOHAMA (JAPAN)

Personal Author(s) : Ohsugi,T. ; Masuda,Y.

Report Date : NOV 1986

Pagination or Media Count : 7

Abstract : A coated optical fiber generally has a small amount of residual microbending resulting from the production process, and this residual microbending it amplified by the shrinkage of the coating material at low temperatures. Transmission loss is known to start increasing the distortion of optical fiber when thermal shrinkage exceeds a certain level. An optical fiber was newly developed so that the influence of shrinkage of the coating material was reduced and a very low and stable transmission loss was achieved at liquid helium temperature, -269 C (4.2 K). Reliability tests such as temperature cycle test, bending and compression test at liquid nitrogen temperature were conducted on the fiber, and it was confirmed that this fiber has no problems for practical use. (Author)

Descriptors :   *FIBER OPTICS, *CRYOGENICS, LIQUID HELIUM, LIQUID NITROGEN, BENDING, COMPRESSION

Subject Categories : Optics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE