Vernier effect of two cascaded in-fiber Mach-Zehnder interferometers based on a spherical-shaped structure
Abstract:
The Vernier effect of two cascaded in-fiber Mach-Zehnder interferometers (MZIs) based on a spherical-shaped structure has been investigated. The envelope based on the Vernier effect is actually formed by a frequency component of the superimposed spectrum, and the frequency value is determined by the subtraction between the optical path differences of two cascaded MZIs. A method based on band-pass filtering is put forward to extract the envelope efficiently; strain and curvature measurements are carried out to verify the validity of the method. The results show that the strain and curvature sensitivities are enhanced to -8.47 pm/με and -33.70 nm/m-1 with magnification factors of 5.4 and -5.4, respectively. The detection limit of the sensors with the Vernier effect is also discussed.
Related Concept Videos
06:16Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
16:11Implementation of a Reference Interferometer for Nanodetection
07:38Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape
09:43Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Intracellular Signaling Cascades
11:58Using In Vitro and In-cell SHAPE to Investigate Small Molecule Induced Pre-mRNA Structural Changes


