Low-threshold cavitation in water using IR laser pulse trains.
The low-temperature cavitational disruption by trains of laser pulses was demonstrated in water. The trains used in the experiment were generated by a Raman laser at a wavelength of 1626 nm. The mean value of the fragmentation threshold energy density per pulse in a train was estimated to be equal to 7.2x10(6) J/m(3). The corresponding amplitude of the negative pressure had the order of 6-7 bars at a temperature jump of only about 2 degrees C. This result opens up prospects for developing precision nonthermal cavitational laser surgery.
Zheltov
G I
GI
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Nesalezhnasti Avenue 68, Minsk 220072, Belarus. zheltov@tut.by
Lisinetskii
V A
VA
Grabtchikov
A S
AS
Orlovich
V A
VA
D004307:Dose-Response Relationship, Radiation; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects*; D007259:Infrared Rays; D053685:Laser Therapy; D007834:Lasers; D045423:Microbubbles; D011312:Pressure; D011829:Radiation Dosage; D014867:Water / Q000737:chemistry*
D005740:Gases; D014867:Water