Simple all-microstructured-optical-fiber interferometer built via fusion splicing.


We report a compact and stable all-microstructured-optical-fiber interferometer built with two fusion splices separated a few centimeters from each other. The air-holes of the fiber are intentionally collapsed in the vicinity of the splices. This broadens the propagating optical mode, allowing coupling of two modes in the section between the splices. A truly sinusoidal interference pattern was observed from 800 nm to 1600 nm with fringe visibility reaching 80%. The fringe spacing was inversely proportional to the distance between the splices. The potential of the device for sensing applications is demonstrated.

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@article{Villatoro2007SimpleAI, title={Simple all-microstructured-optical-fiber interferometer built via fusion splicing.}, author={Joel Villatoro and Vladimir P. Minkovich and Valerio Pruneri and Gonçal Badenes}, journal={Optics express}, year={2007}, volume={15 4}, pages={1491-6} }