Optical fiber preform, optical fiber and their manufacturing...

Details Optical fiber preform, optical fiber and their manufacturing... Optical fiber preform, optical fiber and their manufacturing...

C - Chemistry, Metallurgy

03

B

C03B 37/012 (2006.01) C03B 37/014 (2006.01) C03B 37/018 (2006.01) C03B 37/027 (2006.01) G02B 6/02 (2006.01) G02B 6/10 (2006.01)

Patent

CA 2126488

ABSTRACT OF THE DISCLOSURE An optical fiber preform of the present invention comprises a core made of a transparent material in a central region and a cladding made of a transparent material in a peripheral region, and the optical fiber preform is uniformly twisted in the core in one direction or around a central axis passing through in the vicinity of said core in one direction, and has a length longer than a twisted pitch, so that an optical fiber which is drawn from the preform has uniform twists remained in one direction, and polarization dispersion which occurs in an optical signal propagating in the optical fiber appears around an optical axis in 360° direction and is cancelled out one after another; therefore, the entire polarization dispersion can be suppressed. Further, the optical fiber may be twisted in a step of vitrifying or pulling during optical fiber manufacture, which does not cause a rise in the processing cost.

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