A microfiber Bragg grating based on a microstructured rod

Xu, Fei, Brambilla, Gilberto, Feng, Jing and Lu, Yanqing (2009) A microfiber Bragg grating based on a microstructured rod. In 2009 IEEE LEOS Annual Meeting Conference Proceedings, LEOS '09. pp. 336-337 .

Abstract

Microfiber-based devices (MDs) have recently attracted much attention because of the enormous progress in the fabrication of low-loss sub-micrometric optical wires which allow for low-loss evanescent waveguiding. 3D microcoil resonators in Teflon and in low index liquid, a refractometric sensor based on a coated optical nanowire microcoil resonator has been investigated and demonstrated [1-3]. Although microcoil resonators have a wealth o af applications for future all-fiber micro-photonic circuits, more MDs (in particular gratings) are required. Similarly to gratings written in conventional fibers and waveguides, microfiber grating can have several different applications, including filters, sensors, and distributed feedback (DFB) lasers. The standard use of photosensitivity fiber core and UV writing is inconvenient for a microfiber because of the disappearance of the germanium core during the tapering process [4]. Here we propose to obtain a microfiber Bragg grating (MBG) by wrapping a microfiber on a microstructured rod. Combining current enabling technologies on microstructured optical fibers and microfibers[5], it is possible to induce periodical corrugations leading to the coupling between forward and backward propagating waves. This device is robust, compact and flexible.

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Contributors

Author: Gilberto Brambilla

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