Patent ID: 7379646
Filing Date: 2008-05-27
Classification: G02B

Abstract:
1. A method of evaluating a characteristic of an optical fiber product comprising an effective use portion where a first region with a positive chromatic dispersion at a predetermined wavelength and a second region with a negative chromatic dispersion at the predetermined wavelength are arranged alternately along a longitudinal direction of said effective use portion, and surplus portions positioned at both ends of the effective use portion and used in each work process up to installation work of an optical cable, said method comprising the steps of: measuring a chromatic dispersion of said whole optical fiber product including said surplus portions; calculating an error component included in the chromatic dispersion of said whole optical fiber product and the chromatic dispersion of said effective use portion in said optical fiber product, based on the measured chromatic dispersion of said whole optical fiber product and the product information thereof relating to said surplus portions given beforehand; and comparing a value of the chromatic dispersion obtained from the product information of said optical fiber product given beforehand, and the calculated chromatic dispersion of said effective use portion in said optical fiber product.