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.

[1]  Réal Vallée,et al.  Microstructured fiber splicing. , 2003, Optics express.

[2]  Robert S. Windeler,et al.  Integrated all-fiber variable attenuator based on hybrid microstructure fiber , 2001 .

[3]  J. Canning,et al.  Intermodal interference in a photonic crystal fibre. , 2004, Optics express.

[4]  M.K. Rao,et al.  An effective splicing method on photonic crystal fiber using CO2 laser , 2003, IEEE Photonics Technology Letters.

[5]  Libo Yuan,et al.  In-fiber integrated Michelson interferometer. , 2006, Optics letters.

[6]  B. Lee,et al.  Mach-Zehnder interferometer formed in a photonic crystal fiber based on a pair of long-period fiber gratings. , 2004, Optics letters.

[7]  D. Monzon-Hernandez,et al.  Compact modal interferometer built with tapered microstructured optical fiber , 2006, IEEE Photonics Technology Letters.

[8]  Feng Zhang,et al.  Microstructured Optical Fibers as High-Pressure Microfluidic Reactors , 2006, Science.

[9]  Michel J. F. Digonnet,et al.  Observation of mode coupling in bitapered air-core photonic bandgap fibers , 2007 .

[10]  P. Russell,et al.  Photonic Crystal Fibers , 2003, Science.

[11]  J. Canning,et al.  Photonic crystal fibre optical attenuators , 2005 .

[12]  T. A. Birks,et al.  Compact, stable and efficient all-fibre gas cells using hollow-core photonic crystal fibres , 2005, Nature.

[13]  J. Ju,et al.  Two-mode operation in highly birefringent photonic Crystal fiber , 2004, IEEE Photonics Technology Letters.

[14]  Saikat Ghosh,et al.  Resonant optical interactions with molecules confined in photonic band-gap fibers. , 2005, Physical review letters.

[15]  Brian Joseph Mangan,et al.  Remotely addressed optical fibre curvature sensor using multicore photonic crystal fibre , 2001 .

[16]  A.D. Yablon,et al.  Low-loss high-strength microstructured fiber fusion splices using GRIN fiber lenses , 2004, Optical Fiber Communication Conference, 2004. OFC 2004.

[17]  Vladimir P. Minkovich,et al.  Large-mode-area holey fibers with a few air channels in cladding: modeling and experimental investigation of the modal properties , 2004 .