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We proposed a 3D 4×4 optical switch using vertical multimode interference (VMMI) couplers. This device can flexibly expand vertical connectable distance varying the height of the MMI coupler. We fabricated the device with a VMMI height of 10.0 μm as well as a wide band optical switching. And we measured fundamental operation and combine results.
A diaphragm based Michelson interferometric fiber-optic acoustic sensor based on symmetric 3×3 coupler is demonstrated in this paper. An ellipse fitting differential cross multiplication algorithm is proposed for signal interrogating. Experimental results show that a minimum detectable pressure (MDP) level of ∼500 μPa/Hz1/2 is obtained.
The slew rate of a Mach-Zehnder Modulator (MZM) may be improved by adding appropriate feedback to the classic single stage finite impulse response (FIR) configuration.
In this paper, we propose the mirror-symmetric Fano-like resonances which are generated by the interference between two resonant beam from through and drop ports of an add-drop microring resonator. While the path lengths of the two beams are different, small quasi-periodic spectral responses are nested in large periodic ones. The line shapes of the resonances are mirror images about the center wavelength...
A novel and compact cone-shaped in wall coupler is demonstrated to excite the whispering gallery modes, which is fabricated with a single mode fiber and a capillary possessed by the chemical etching method, with a microsphere inserted into the end of the etched capillary, to observe the Fano resonances potential for sensors and switches.
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