Temperature-compensated fiber optic 3D shape sensor using femtosecond laser direct-written Bragg grating waveguides

K. K. C. Lee; A. Mariampillai; M. Haque; B. A. Standish; V. X. D. Yang; P. R. Herman

doi:10.1117/12.2042264

7 March 2014 Temperature-compensated fiber optic 3D shape sensor using femtosecond laser direct-written Bragg grating waveguides

K. K. C. Lee, A. Mariampillai, M. Haque, B. A. Standish, V. X. D. Yang, P. R. Herman

Author Affiliations +

Proceedings Volume 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV; 897210 (2014) https://doi.org/10.1117/12.2042264
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

A fiber-optic 3D shape, position and temperature sensor is demonstrated with femtosecond laser direct-written optical and Bragg grating waveguides that were distributed axially and radially inside a single coreless optical fiber. Efficient light coupling between the laser-written optical circuit elements and a standard single-mode optical fiber was obtained by 3D laser writing of a 1 × 3 directional coupler and fusion splicing. Coupler optimization by real-time monitoring of Bragg grating strengths is discussed. Simultaneous interrogation of nine Bragg gratings is presented through a single waveguide port to follow the Bragg wavelength shifts and thereby infer shape and temperature profile along the fiber length.

Citation Download Citation

K. K. C. Lee, A. Mariampillai, M. Haque, B. A. Standish, V. X. D. Yang, and P. R. Herman "Temperature-compensated fiber optic 3D shape sensor using femtosecond laser direct-written Bragg grating waveguides", Proc. SPIE 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV, 897210 (7 March 2014); https://doi.org/10.1117/12.2042264

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