MOPA fiber laser for photoacoustic imaging using arrayed ultrasound transducer

Yong-Jae Lee; Jun-Tae Ahn; Eun-Ju Jeong; Hyun-Woo Song; Chang-Geun Ahn; Hyung Wook Noh; Joo Yong Sim; Min Yong Jeon; Susung Lee; Bong Kyu Kim

doi:10.1117/12.2267459

23 April 2017 MOPA fiber laser for photoacoustic imaging using arrayed ultrasound transducer

Yong-Jae Lee, Jun-Tae Ahn, Eun-Ju Jeong, Hyun-Woo Song, Chang-Geun Ahn, Hyung Wook Noh, Joo Yong Sim, Min Yong Jeon, Susung Lee, Bong Kyu Kim

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032357 (2017) https://doi.org/10.1117/12.2267459
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

An Nd:YAG laser is generally used as the optical source for photoacoustic imaging (PAI) systems, which support a high-power pulsed laser. However, PAI systems based on Nd:YAG lasers have several disadvantages, such as instability against impact and vibration, poor mobility, and large size. To overcome the limitations, we demonstrate a PAI system using a master oscillator power amplifier (MOPA) fiber laser and an arrayed ultrasound transducer. The fabricated MOPA fiber laser has a variable repetition rate in the range of 1–50 kHz, a pulse width of 10–70 ns, and an output power of 160 μJ. Furthermore, it is stable to impact and vibration, mobile, and compact with a size of 427×250×170 mm³. We achieved PAI 150 times faster using MOPA fiber laser than using Nd:YAG laser with the arrayed ultrasound transducer composed of 128 elements. Therefore, we believe that the PAI system based on the MOPA fiber laser has significant potential for use as a clinical ultrasound imaging system.

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Yong-Jae Lee, Jun-Tae Ahn, Eun-Ju Jeong, Hyun-Woo Song, Chang-Geun Ahn, Hyung Wook Noh, Joo Yong Sim, Min Yong Jeon, Susung Lee, and Bong Kyu Kim "MOPA fiber laser for photoacoustic imaging using arrayed ultrasound transducer", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032357 (23 April 2017); https://doi.org/10.1117/12.2267459

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