REDUCTION IN ATTENUATION FOR OPTICAL FIBER

    公开(公告)号:JPH01142607A

    公开(公告)日:1989-06-05

    申请号:JP25962188

    申请日:1988-10-17

    Abstract: PURPOSE: To shift a minimum attenuation point to a minimum dispersion area without requiring a complicated production work by reducing a heterogenous area in materials of an optical fiber. CONSTITUTION: The optical fiber is oscillated with a superaudible frequency, which brings about rearrangement of atoms to a lower energy state, to reduce the heterogenous area in materials of the optical fiber. This external stress is, for example, oscillation with the super-audible frequency applied for several minutes and is realized with a simple device, namely, a furnace where the fiber is heated up to a desired temperature and an ultrasonic generator which oscillates the fiber. Thus, attenuation due to Rayleigh scattering is reduced by relaxation induced in the molecular structure.

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