A new compact standard single mode fiber Michelson interferometer deflection sensor was proposed, tested and
simulated. The new interferometer consists of a symmetrical abrupt 3 dB taper region with a 40 μm waist diameter, a
700 μm length and a 500nm thick gold layer coating. Compared with similar interferometric devices based on long
period gratings that need microfabrication technology and photosensitive fibers, the proposed sensor uses a much
simplified fabrication process and normal single mode fiber, and has a linear response of 1.1nm/mm.