Design of lithotripsy system of nanosecond Cr,Tm,Ho：YAG laser

CHEN Ruitao; GU Huadong; ZHENG Chenqi; YANG Jie; WU Xianyou

doi:10.7510/jgjs.issn.1001-3806.2014.04.002

In order to improve the lithotripsy rate and degree and reduce the side effects during the process of lithotripsy, nanosecond holmium laser lithotripsy system with high peak power output was designed on the base of electro-optical Q-switched technology. Theoretical analysis was made from the aspects of cooling temperature, transmittance and cavity length. Under the conditions of cooling temperature 22℃, repetition rate 3Hz and pump energy 200J, experimental verification was made. The maximum single pulse energy of 443mJ and pulse width of 90ns were obtained. The lithotripsy system can supply high peak power output of nanosecond holmium laser and can crush the lithosis of any component within short lithotripsy time at high lithotripsy rate and degree. The results demonstrate that the system has high performance and lays the foundation for the next step of industry.

Design of lithotripsy system of nanosecond Cr,Tm,Ho：YAG laser

1. Suzhou Institute of Biomedical Engineering and Technology, China Academy of Sciences, Suzhou 215163, China;

2. Jiangsu Key Laboratory of Medical Optics, Suzhou 215163, China;

3. Anhui Institute of Optics and Fine Mechanics, China Academy of Sciences, Hefei 230031, China

Received Date: 2013-08-27

Accepted Date: 2013-10-28

Available Online: 2014-07-25

Abstract: In order to improve the lithotripsy rate and degree and reduce the side effects during the process of lithotripsy, nanosecond holmium laser lithotripsy system with high peak power output was designed on the base of electro-optical Q-switched technology. Theoretical analysis was made from the aspects of cooling temperature, transmittance and cavity length. Under the conditions of cooling temperature 22℃, repetition rate 3Hz and pump energy 200J, experimental verification was made. The maximum single pulse energy of 443mJ and pulse width of 90ns were obtained. The lithotripsy system can supply high peak power output of nanosecond holmium laser and can crush the lithosis of any component within short lithotripsy time at high lithotripsy rate and degree. The results demonstrate that the system has high performance and lays the foundation for the next step of industry.

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Reference (18)

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Design of lithotripsy system of nanosecond Cr,Tm,Ho：YAG laser

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