Variable repetition rate of 1700 nm SRS pulsed fiber laser for PA generation (Conference Presentation)

Seongjin Bak; Sang Min Park; Gyeong Hun Kim; Soon-Woo Cho; Chang-Seok Kim

doi:10.1117/12.2649719

16 March 2023 Variable repetition rate of 1700 nm SRS pulsed fiber laser for PA generation (Conference Presentation)

Seongjin Bak, Sang Min Park, Gyeong Hun Kim, Soon-Woo Cho, Chang-Seok Kim

Proceedings Volume PC12391, Label-free Biomedical Imaging and Sensing (LBIS) 2023; PC123910N (2023) https://doi.org/10.1117/12.2649719
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Photoacoustic imaging (PAI) is a label-free biomedical imaging technique based on photoacoustic effects. PAI can differentiate various tissues by the different absorption coefficients of each molecule. Therefore, the wavelength band around 1700 nm is advantageous for finding lipid tissue because lipids have a higher absorption coefficient than water at around 1700 nm. In this paper, we demonstrate a stimulated Raman scattering (SRS) pulsed fiber laser with a variable repetition rate for PA generation in 1700 nm. The pulse repetition rate and the pulse energy are inversely proportional under the given optical gain. Therefore, by utilizing a pulse laser with variable repetition rate, we can determine the optimal pulse energy and measurement speed required by the system.

Conference Presentation

Citation Download Citation

Seongjin Bak, Sang Min Park, Gyeong Hun Kim, Soon-Woo Cho, and Chang-Seok Kim "Variable repetition rate of 1700 nm SRS pulsed fiber laser for PA generation (Conference Presentation)", Proc. SPIE PC12391, Label-free Biomedical Imaging and Sensing (LBIS) 2023, PC123910N (16 March 2023); https://doi.org/10.1117/12.2649719

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KEYWORDS

Pulsed fiber lasers

Raman spectroscopy

Absorption

Fiber amplifiers

Tissues

Photoacoustic spectroscopy

Pulsed laser operation

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