Plasma plume expansion dynamics in nanosecond Nd:YAG laserosteotome

Hamed Abbasi, Georg Rauter, Raphael Guzman, Philippe C. Cattin, Azhar Zam

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In minimal invasive laser osteotomy precise information about the ablation process can be obtained with LIBS in order to avoid carbonization, or cutting of wrong types of tissue. Therefore, the collecting fiber for LIBS needs to be optimally placed in narrow cavities in the endoscope. To determine this optimal placement, the plasma plume expansion dynamics in ablation of bone tissue by the second harmonic of a nanosecond Nd:YAG laser at 532 nm has been studied. The laserinduced plasma plume was monitored in different time delays, from one nanosecond up to one hundred microseconds. Measurements were performed using high-speed gated illumination imaging. The expansion features were studied using illumination of the overall visible emission by using a gated intensified charged coupled device (ICCD). The camera was capable of having a minimum gate width (Optical FWHM) of 3 ns and the timing resolution (minimum temporal shift of the gate) of 10 ps. The imaging data were used to generate position-time data of the luminous plasma-front. Moreover, the velocity of the plasma plume expansion was studied based on the time-resolved intensity data. By knowing the plasma plume profile over time, the optimum position (axial distance from the laser spot) of the collecting fiber and optimal time delay (to have the best signal to noise ratio) in spatial-resolved and time-resolved laser-induced breakdown spectroscopy (LIBS) can be determined. Additionally, the function of plasma plume expansion could be used to study the shock wave of the plasma plume.

Original languageEnglish (US)
Title of host publicationHigh-Speed Biomedical Imaging and Spectroscopy III
Subtitle of host publicationToward Big Data Instrumentation and Management
EditorsKeisuke Goda, Kevin K. Tsia
ISBN (Electronic)9781510614956
StatePublished - 2018
EventHigh-Speed Biomedical Imaging and Spectroscopy III: Toward Big Data Instrumentation and Management 2018 - San Francisco, United States
Duration: Jan 29 2018Jan 30 2018

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferenceHigh-Speed Biomedical Imaging and Spectroscopy III: Toward Big Data Instrumentation and Management 2018
Country/TerritoryUnited States
CitySan Francisco


  • Fast photography
  • laserosteotome
  • plasma plume
  • time-resolved

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging


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