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13 March 2024 Ultra-wideband wavelength-swept laser beyond 430 nm using a single polygonal mirror scanning wavelength filter for fiber optic sensors
Min Su Kim, Soyeon Ahn, Byeong Kwon Choi, Ji Su Kim, Sung Yoon Cho, Min Yong Jeon
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Proceedings Volume PC12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV; PC128350O (2024) https://doi.org/10.1117/12.3011192
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
Wideband wavelength swept lasers (WSLs) are widely used as light sources for dynamic fiber optic sensors. In this study, we implemented an ultra-wideband wavelength-swept laser (WSL) that achieved a 10 dB bandwidth over 430 nm using a single polygonal scanning mirror-based wavelength tunable filter. The wavelength scanning range with a 1.8kHz scanning frequency is 1136.0~1567.2nm. Comparing the WSL output signal in the temporal and spectral domains resulted in an error of 0.7 nm in the mid-crossing region of the two gain media. To confirm WSL performance, the transmission band was measured by changing the electric field applied to the cholesteric liquid crystal cell, and it was confirmed that the transmitted beam according to the applied electric field matched each other in the spectral and temporal domains.
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Min Su Kim, Soyeon Ahn, Byeong Kwon Choi, Ji Su Kim, Sung Yoon Cho, and Min Yong Jeon "Ultra-wideband wavelength-swept laser beyond 430 nm using a single polygonal mirror scanning wavelength filter for fiber optic sensors", Proc. SPIE PC12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV, PC128350O (13 March 2024); https://doi.org/10.1117/12.3011192
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KEYWORDS
Fiber lasers
Fiber optics sensors
Tunable filters
Mirrors
Optical filters
Electric fields
Laser frequency
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