Multi-dimensional fiber optic sensors for biomedical and soft robotic applications
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Optical fiber sensing has been widely used in in biomedical and soft robotics applications due to the unique features such as small size, high sensitivity, flexibility, and immunity to electromagnetic interference. Among various types of optical fiber sensors, fiber Bragg grating (FBG) sensor has drawn lot of attention due to its unique advantages such as compact size, simple fabrication process, and high sensitivity for various physical phenomenon. In this thesis, several unique designs of FBG based sensors for biomedical and soft robotics applications are presented to achieve multi-dimensional measurement. FBG based sensors with different structures are used for sensing various physical parameters including contact force, bending curvature, and shape. Furthermore, a new interrogation scheme for FBG sensor is presented to simplify the measurement process of FBG as well as to enable real time sensing.