A Caltech Library Service

Dual-pulse nonlinear photoacoustic imaging: Physics, sensing and imaging system design

Gao, Fei and Feng, Xiaohua and Zhang, Ruochong and Liu, Siyu and Ding, Ran and Zheng, Yuanjin (2017) Dual-pulse nonlinear photoacoustic imaging: Physics, sensing and imaging system design. In: 2017 IEEE 12th International Conference on ASIC (ASICON). IEEE , Piscataway, NJ, pp. 600-603. ISBN 978-1-5090-6625-4.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Photoacoustic sensing and imaging techniques have been studied widely to explore optical absorption contrast based on nanosecond laser illumination. In this paper, we report a long laser pulse induced dual photoacoustic (LDPA) nonlinear effect, which originates from unsatisfied stress and thermal confinements. Being different from conventional short laser pulse illumination, the proposed method utilizes a long square-profile laser pulse to induce dual photoacoustic signals. Without satisfying the stress confinement, the dual photoacoustic signals are generated following the positive and negative edges of the long laser pulse. More interestingly, the first expansion-induced photoacoustic signal exhibits positive waveform due to the initial sharp rising of temperature. On the contrary, the second contraction-induced photoacoustic signal exhibits exactly negative waveform due to the falling of temperature, as well as pulse-width-dependent signal amplitude. An analytical model is derived to describe the generation of the dual photoacoustic pulses, incorporating Gruneisen saturation and thermal diffusion effect, which is experimentally proved in vivo.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Additional Information:© 2017 IEEE. We acknowledge Dr. Linyi Bai and Prof. Yanli Zhao for providing the IR-820 sample used in the in vivo animal experiments.
Record Number:CaltechAUTHORS:20180329-141935371
Persistent URL:
Official Citation:F. Gao, X. Feng, R. Zhang, S. Liu, R. Ding and Y. Zheng, "Dual-pulse nonlinear photoacoustic imaging: Physics, sensing and imaging system design," 2017 IEEE 12th International Conference on ASIC (ASICON), Guiyang, 2017, pp. 600-603. doi: 10.1109/ASICON.2017.8252547. URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85505
Deposited By: Tony Diaz
Deposited On:29 Mar 2018 21:49
Last Modified:15 Nov 2021 20:29

Repository Staff Only: item control page