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13 March 2024 High-speed wideband wavelength tunable Raman fiber laser for photoacoustic spectroscopy of lipids
Sang Min Park, Seongjin Bak, Gyeong Hun Kim, Soon-Woo Cho, Hwidon Lee, Chang-Seok Kim
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Proceedings Volume PC12853, High-Speed Biomedical Imaging and Spectroscopy IX; PC128530P (2024) https://doi.org/10.1117/12.3003593
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
Photoacoustic imaging (PAI) detects ultrasonic signals from tissue optical absorption. Lipids, with strong absorption at 1.7 μm, are valuable for arteriosclerosis and myocardial infarction imaging. We introduce a high-speed wideband wavelength tunable Raman fiber laser for photoacoustic spectroscopy of lipids. Pump lasers adjust from 1560 to 1600 nm, with a 1 ns pulse width and 100 kHz repetition rate. The pump light combines with seed light and passes the Raman fiber. The seed light amplifies by matching the Raman gain spectrum generated through stimulated Raman scattering. We obtained photoacoustic images in the 1670 - 1720 nm range, demonstrating our lasers for lipid imaging.
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Sang Min Park, Seongjin Bak, Gyeong Hun Kim, Soon-Woo Cho, Hwidon Lee, and Chang-Seok Kim "High-speed wideband wavelength tunable Raman fiber laser for photoacoustic spectroscopy of lipids", Proc. SPIE PC12853, High-Speed Biomedical Imaging and Spectroscopy IX, PC128530P (13 March 2024); https://doi.org/10.1117/12.3003593
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KEYWORDS
Raman spectroscopy
Fiber lasers
Photoacoustic spectroscopy
Signal detection
Tunable lasers
Biomedical optics
Fiber amplifiers
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