CPC A61B 18/04 (2013.01) [A61B 5/0095 (2013.01); A61B 18/26 (2013.01); B01J 19/10 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); A61B 5/0035 (2013.01); A61B 5/0059 (2013.01); A61B 8/4416 (2013.01); A61B 8/4483 (2013.01); A61B 2018/2205 (2013.01); A61B 2018/2244 (2013.01); A61B 2018/2261 (2013.01); A61B 2018/266 (2013.01); G01N 29/2431 (2013.01); G01S 15/8968 (2013.01); G02B 6/004 (2013.01); G02B 6/021 (2013.01); G02B 6/02033 (2013.01); G02B 6/02104 (2013.01); G02B 6/34 (2013.01)] | 23 Claims |
1. A tapered fiber optoacoustic emitter (TFOE) comprising:
a nanosecond laser configured to emit laser pulses; and
an optic fiber with a tip, the optic fiber configured to guide the laser pulses, the tip having a coating including a diffusion layer and a thermal expansion layer,
wherein:
the diffusion layer comprises epoxy and zinc oxide nanoparticles configured to diffuse the light while restricting localized heating around the diffusion layer;
the thermal expansion layer comprises carbon nanotubes (CNTs) and Polydimethylsiloxane (PDMS) configured to convert the laser pulses to generate ultrasound; and
a frequency of the ultrasound is determined based on a thickness of the diffusion layer and a CNT concentration of the thermal expansion layer.
|