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Question 2 The revolution of optical fiber technology nowadays expands to the optical fiber sensor. Optical fiber sensor has been classified for two namely, extrinsic fiber sensor and intrinsic fiber sensor. There are many types of optical fiber sensor according to intrinsic of extrinsic classification such as interferometric sensor, micro-bend sensor, evanescent sensor, and fluorescence sensor. However, each type of the sensor operated based on several mechanism that suit with the design of that optical sensor. The most common sensing method are intensity modulation, wavelength modulation, phase modulation, luminescence, surface plasmon and time varying modulation. With the aid of diagram, design and explain ONE an optical fiber sensor that suit with any of selected mechanism.