Method for determining a condition of aging for optical fiber grating
AssigneeSumitomo Electric Industries, Ltd.
InventorsShinji Ishikawa, Toru Iwashima, Michiko Harumoto, Akira Inoue
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Abstract
The present invention provides a method for determining a condition of aging for an optical fiber grating. This method comprises a step of setting the aged deterioration curve of the optical fiber grating as a form proportional to t.sup.-n, where t represents time, and n represents a parameter dependent on temperature; and a step of determining the condition of the aging according to the aged deterioration curve.
Claims9
A method for making an optical fiber grating wherein said optical fiber grating is designed so that when used for a predetermined operating time at a predetermined operating temperature, its deterioration is suppressed within a predetermined tolerance, said method comprising:
- forming a grating at a region in an optical fiber;
- and
- aging said grating under a condition determined according to a method comprising:
- setting an aged deterioration curve of said optical fiber grating as a form proportional to t.sup.-n, where t represents time, and n represents a parameter dependent on temperature;
- and
- determining said condition of the aging according to said aged deterioration curve.
Dependencies are inferred from the claim text.