Low-cost fiber Bragg grating interrogation with a femtosecond laser written scattering chip

Przemyslaw Falak; Qi Sun; Tom Vettenburg; Timothy Lee; David B. Phillips; Gilberto Brambilla; Martynas Beresna

doi:10.1117/12.2648760

17 March 2023 Low-cost fiber Bragg grating interrogation with a femtosecond laser written scattering chip

Przemyslaw Falak, Qi Sun, Tom Vettenburg, Timothy Lee, David B. Phillips, Gilberto Brambilla, Martynas Beresna

Proceedings Volume 12408, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVIII; 1240806 (2023) https://doi.org/10.1117/12.2648760
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Fiber Bragg gratings are the most popular type of optical fiber sensor. However, its commercial use is frequently limited by high cost and complexity of the interrogation unit. Here, an interrogator based on a femtosecond laser written silica scattering chip is designed and implemented. Such device can directly reconstruct strain, from the scattering speckle patterns, with a resolution of 70 μϵ (microstrain) within the range of 180-700 μϵ, limited by the slippage of the fiber coating, with the potential to be reduced with the system improvements.

Conference Presentation

Citation Download Citation

Przemyslaw Falak, Qi Sun, Tom Vettenburg, Timothy Lee, David B. Phillips, Gilberto Brambilla, and Martynas Beresna "Low-cost fiber Bragg grating interrogation with a femtosecond laser written scattering chip", Proc. SPIE 12408, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVIII, 1240806 (17 March 2023); https://doi.org/10.1117/12.2648760

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