Thermal strain along optical fiber in lightweight composite FOG : Brillouin-based distributed measurement and finite element analysis

Shu Minakuchi; Teruhisa Sanada; Nobuo Takeda; Shinji Mitani; Tadahito Mizutani; Yoshinobu Sasaki; Keisuke Shinozaki

doi:10.1117/12.2059717

2 June 2014 Thermal strain along optical fiber in lightweight composite FOG : Brillouin-based distributed measurement and finite element analysis

Shu Minakuchi, Teruhisa Sanada, Nobuo Takeda, Shinji Mitani, Tadahito Mizutani, Yoshinobu Sasaki, Keisuke Shinozaki

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91572H (2014) https://doi.org/10.1117/12.2059717
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Thermal strain significantly affects stability of fiber optic gyroscope (FOG) performance. This study investigates thermal strain development in a lightweight carbon fiber reinforced plastic (CFRP) FOG under thermal vacuum condition simulating space environment. First, we measure thermal strain distribution along an optical fiber in a CFRP FOG using a Brillouin-based high-spatial resolution system. The key strain profile is clarified and the strain development is simulated using finite element analysis. Finally, several constituent materials for FOG are quantitatively compared from the aspect of the maximum thermal strain and the density, confirming the clear advantage of CFRP.

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Shu Minakuchi, Teruhisa Sanada, Nobuo Takeda, Shinji Mitani, Tadahito Mizutani, Yoshinobu Sasaki, and Keisuke Shinozaki "Thermal strain along optical fiber in lightweight composite FOG : Brillouin-based distributed measurement and finite element analysis", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91572H (2 June 2014); https://doi.org/10.1117/12.2059717

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