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Ｔｈｅｃｈａｎｇｅｓｏｆｏｐｔｉｃａｌｐｏｗｅｒｉｎｄｕｃｅｄ ｂｙ ｔｅｍｐｅｒａｔｕｒｅｉｓｔｈｅｏｒｅｔｉｃａｌｌｙａｎａｌｙｚｅｄｉｎ ｅｔｃｈｅｄ ｏｐｔｉｃａｌｆｉｂｅｒ ｓｅｎｓｏｒ，ｔｈｅ ｔｅｍ ｐｅｒａｔｕｒｅ ｓｅｎｓｉｔｉｖｉｔｙ ｏｆ ｏｕｔｐｕｔ ｐｏｗ ｅｒ δＰ／ＰδＴ ｉｓｃａｌｃｕｌａｔｅｄ ｔｏ ｂｅａｂｏｕｔ１０－ ６／℃．Ｉｔｉｓａｃｃｏｒｄａｎｔｗｉｔｈ ｔｈｅｅｘｐｅｒｉｍ ｅｎｔａｌｒｅｓｕｌｔｓ．Ｉｔｉｎｄｉｃａｔｅｓｔｈａｔｔｈｅ ｅｔｃｈｅｄ ｏｐｔｉｃａｌｆｉｂｅｒ ｓｅｎｓｏｒｃａｎｎｏｔｂｅ ｄｉｒｅｃｔｌｙ ｕｓｅｄ ｔｏ ｔｅｍｐｅｒａｔｕｒｅ ｓｅｎｓｉｎｇ，ａｎｄｔｈｅｅｆｆｅｃｔｏｆｔｅｍｐｅｒａｔｕｒｅ ｉｎ ｓｔｒａｉｎ、ｓｔｒｅｓｓｓｅｎｓｉｎｇ ｃａｎ ｂｅａｌｓｏ ｎｅｇｌｅｃｔｅｄ
Thechangesofopticalpowerinducedbytemperatureistheoreticallyanalyzedin etched optical fiber sensor, the tem perature sensitivity of output pow er δP / PδT iscalculated to beabout10-6 / ° C. Itisaccordantwith theexperim entalresults. Itindicatesthatthe etched opticalfiber sensorcannotbe directly used to temperature sensing, and theeffectoftemperature in strain, stresssensing can bealso neglected