1、The materials and methods used in the paper is generally quality according to the priciples of writing scientific papers. This section contains two main parts: the employed materials and the way of generating the underwater shock wave in the experiment. They are so clearly introduced that readers wh
2、o are interested in the concerning study can repeat the experiments again. In the first paragraph, the authors present the materials used in the experiment in detail. Based on the schematic diagram of the experimental setup, the chamber and the pulsed laser as well as the needle hydrophone and so on
3、 are all clearly introduced. After reading this section, readers can know sufficient information about the chamber, with the size of 500*500*500 mm and material character of stainless; readers can also get the information that the AgN3 pellet used in the experiment is provided by Chugoku Kayaku Co;
4、specially readers can make a correct decision to place the measuring surface of the pressure gauge normally to the shock wave front if they want to reproduce the experiment successfully.In the second paragraph, the authors indicate the way of generating the underwater shock wave, as was first used b
5、y Takayama in 1983. The authors succeed in obtainting a typical underwater spherical shock wave captured 23s after the ignition of 10 mg of AgN3 pellet by using the above method. From the picture, it is proved right that a conical shock wave originated from the fast elastic waves propagates in the o
6、ptical fiber. The same result has ever been achieved by Hosseini et al. in 2000. The contrast between the current result and the previous result can convince readers of the appropriateness of the experimental methods and the probable validity of the findings in the paper. At the end of this part, the authors specifically explain the different shock wave strength just before the gauze layer as one of the experimental paramers can be obtained by adjusting the distance between the explosive pellet and the gauze layer but keeping the diatance between the layer and hydrophone fixed.
