LONG PERIOD-GRATING MOUNTING METHOD AND LONG PERIOD- GRATING ELEMENT

摘要

PROBLEM TO BE SOLVED: To obtain a long period-grating mounting method by which the fluctuation in characteristics of a long period-grating in the range of the working temp. is suppressed when mounted on a fixing member and a long period-grating element. ;SOLUTION: In step S1, the temp. dependency and tension dependency of the characteristics of the long period-grating are obtd. In step S2, the fixing member is selected in accordance with the temp. dependency and tension dependency obtd. in the step S1. The fixing member is selected as a member mutually offsetting the fluctuation due to the temp. fluctuation and the fluctuation due to the tension fluctuation accompanying the temp. fluctuation, about the characteristics of the long period-grating in the range of the working temp. when the long period-grating is mounted. In step S3, the long period-grating is mounted on the fixing member selected in the step S2. At this time, an initial tension is applied to the long period-grating so that the tension of the long period-grating becomes a positive value in the range of the working temp.;COPYRIGHT: (C)2000,JPO