The core principle of fiber optic strain sensors is the strain-optic effect, which describes how the properties of light change when an optical fiber undergoes mechanical deformation. To this end, this paper proposes a method to estimate the continuous deformation of concrete beams by utilizing the distributed optical fiber monitoring technology. In this method, optical fibers and a total station are used to obtain the strain and deformation distribution curves of a concrete. Structural health monitoring (SHM) plays a vital role in ensuring the safety, durability, and performance of civil infrastructure.
[pdf] The MEMS attenuator design achieves highly repeatable optical attenuation over C and/or L bands through a thermally-actuated reflective vane that intercepts light. The optical fiber built into each device is single mode over the specified operating wavelength. This chapter delves into the revolutionary impact of Micro-Electro-Mechanical Systems (MEMS) on optical devices, driven by advancements in materials science and micro/nano manufacturing techniques. MEMS devices offer unparalleled precision, miniaturization, and low power consumption. DVOA can realize comprehensive remote control of all-optical networks.
[pdf] 
