Fiber optic temperature sensor and manufacturing method for a fiber optic temperature sensor

摘要

A fiber optic temperature sensor (100) comprising: a support structure (110) having a first thermal expansion coefficient (α1); an optical waveguide (120) formed with a sensor structure (122); and a support (130) for the optical waveguide (120) connected to the support structure (110) at at least two first points (140), the at least two first points (140) having a first distance (L1), and the holder (130) has a second coefficient of thermal expansion (α2), wherein the optical waveguide (120) is connected to the holder (130) at at least two second points (150), wherein the at least two second points (150) have a second spacing (150). L2), wherein the second distance (L2) is different from the first distance (L1), wherein a ratio of the first distance (L1) to the second distance (L2) is in a range of 1 to 10, and wherein the second thermal expansion coefficient (α2) is less than 1% of the first thermal expansion coefficient (α1).