Fiber Optic Measurement Techniques Maurice O'Sullivan, Rongqing Hui
Publisher: Academic Press
This new angular dimension would allow us to send many different channels or angles of data through the same light pipes or Fiber Optics. A low-cost all-fiber wavelength measurement technique is proposed and demonstrated. The retinal nerve fiber layer is visualized easily using this technique, and thickness measurements are determined by computer analysis of the resultant image. Lehrstuhl Lehrstuhl fuer Messsystem- und Sensortechnik - MST (Institute for Measurement Systems and Sensor Technology), Technische Universitaet Muenchen - TUM, Theresienstrasse 90/ N5, D-80333 Muenchen, Germany. A ratiometric Publication Details. Fiber optic sensors measure four different modulations to their optical signals: intensity, polarization, phase, and frequency. The principle that makes fiber optics possible, was first demonstrated by Daniel Colladon and Jacques Babinet in Paris in the early 1840s. Wang, Q., Farrell, G., Freir, T., Rajan, G., Wang, P.:Low-Cost Wavelength Measurement based on a Macrobending Single-mode Fiber. A macrobending standard single-mode fiber is developed as an edge filter with an optimal design and simple surface processing. Intensity monitoring is the easiest to set up and measure by bend Sensors are especially powerful in their multi-modal form enhanced by Fiber Bragg Grating (FBG)—a technique that “grates” on the core cladding material to multiply the rate and intensity of this light refraction. Bf and Bi Measurements Obtained Using Sénarmont's Method, (1/4 λ Compensator). Vibration and Shape Control in Opto-mechanical Systems Using Distributed Fiber-optic Bragg Grating Sensors. Novel sensing techniques for the vibration and shape control of such structures are investigated. However, the detailed characterization of skin collagen fibers using optical anisotropy methods remains elusive.