Measurement of refractive index profiles variation along a fusion-splicing tapered optical fiber

Meng-Hsun Wan; Lon A. Wang

doi:10.1117/12.835312

5 October 2009 Measurement of refractive index profiles variation along a fusion-splicing tapered optical fiber

Meng-Hsun Wan, Lon A. Wang

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750373 (2009) https://doi.org/10.1117/12.835312
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

The assumption that a tapered fiber core diameter shrinks down as the same ratio to the cladding diameter was examined by observing the refractive index profiles variation along the fiber. How small the cladding diameter be and the core would still exist was also examined. Refractive index profiling method based on quantitative phase microscopy (QPM) gives the ability to mapping the two dimensional refractive index profiles, and the tapering variation can be obtained from this approach. A small amount of core germanium diffusion was observed, which suggests the non-ideal fact of the core/cladding diameter ratio. The core can still be resolved when the cladding diameter is down to ~10μm, proving the existence of the core down to this scale.

Citation Download Citation

Meng-Hsun Wan and Lon A. Wang "Measurement of refractive index profiles variation along a fusion-splicing tapered optical fiber", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750373 (5 October 2009); https://doi.org/10.1117/12.835312

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