Abstract
The use of drug-eluting stents for percutaneous coronary intervention is the most effective method for the treatment of coronary heart disease. The micro-nano structure on the surface of the coronary stent can realize the storage and controlled release of the loaded drugs. Efficient preparation technology of micro-nano structures on the surface of coronary stents has become a current research hotspot. In this paper, we analyzed the self-locking mechanism of the dual-channel mutual injection solid-state laser, and built a four-beam interference processing system using the laser as the light source to process the surface of the material silicon. In this paper, we analyzed the self-phase locking mechanism of a dual-channel mutual injection solid-state laser. And a four-beam interference processing system with the laser as the light source was built to process the surface of the material silicon. When the working wavelength is 1064nm, the pulse width is 8.1ns, the energies of the four lasers are 78mJ, 86mJ,88mJ, 80mJ respectively, and the exposure time and repetition frequency are set at 60s and 10Hz, we have obtained periods of 3.94$\mu$m and 3.11 $\mu$m hole array structure. This result provides support for subsequent drug-loading experiments on stents, and has positive significance in promoting micro-nano-multiple interference processing technology.
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