Abstract

Manipulative dual-microsphere lasing based on a nanosilica waveguide integrated in a simplified hollow-core microstructured optical fiber (SHMOF) is proposed and demonstrated. The SHMOF, which has a silica-branch structure, provides a nanoscale waveguide array and offers a versatile platform for selective lasing. Emissions at 600 and 640 nm are produced by excitation of different dye-coated microspheres, enabling a laser array with an ultralow nJ-level threshold. Because the transitive energy is bridged by the silica ring, the microsphere lasing could be controlled by another microsphere laser because of the interaction between and dependence of their thresholds. In addition, semidirectional lasing is also achieved by deliberately embedding a microsphere against the hexagonal silica wall.

© 2016 IEEE

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