We present a numerical modeling of a novel three-core fiber optic spanner. The spanner is realized by properly shaping the three-core fiber facet into a truncated triangular pyramid whose slope surfaces are not symmetric to the fiber cores. Three dimensional trapping forces and rotating torques are calculated and optimized as function of different parameters of the structure in ray optics regime. Simulation results show specific rotors can be trapped and rotated efficiently and stably by the spanner.
A novel twin-core fiber connector has been made by two side-polished fibers. By using side polishing technique, we present a connector based on the twin-core fiber (TCF) and two D-shaped single-core fibers. After simple alignment and splicing, all fiber miniaturizing connector can be obtained. Two cores can operate independently and are non-interfering. The coupling loss of this connector is low and the fabrication technologies are mature. The connector device could be used for sensors or particle trapping.
We propose a novel optical tweezers for particle trapping with a double-wedged shape tip in the end of a twin-core fiber by polish technique. The polishing setup and procedure are described in detail and the grinding angle θ has a relationship with the angle β between the convergent beams for trapping particles. By calculating, the optimal angle parameter θ and β depend on the surrounding background refractive index.