Measurements of laser-induced thermoelastic deformation using all-fiber heterodyne interferometer

Seong Jun Park; Jong Hyun Eom; Chang Su Lee; Byeong Ha Lee

doi:10.1117/12.2059546

2 June 2014 Measurements of laser-induced thermoelastic deformation using all-fiber heterodyne interferometer

Seong Jun Park, Jong Hyun Eom, Chang Su Lee, Byeong Ha Lee

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91571L (2014) https://doi.org/10.1117/12.2059546
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We report an all-fiber heterodyne interferometer for the measurements of laser-induced thermoelastic deformation to estimate the Gruneisen coefficient and the optical attenuation depth of a sample. The system comprises a Q-switched Nd-YAG laser providing a nanosecond excitation pulse and an all-fiber heterodyne interferometer that measures the induced displacement of the sample surface. To evaluate the system, phantom experiments were carried out with various gelatin-based models. The results show that the attenuation depth and Gruneisen coefficient of the phantoms were about 4.256 mm and 0.568, respectively. In addition, increase of the weight fraction of gelatin led increase in the Gruneisen coefficient.

Citation Download Citation

Seong Jun Park, Jong Hyun Eom, Chang Su Lee, and Byeong Ha Lee "Measurements of laser-induced thermoelastic deformation using all-fiber heterodyne interferometer", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571L (2 June 2014); https://doi.org/10.1117/12.2059546

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