In this paper, the light source is fiber coupled semiconductor laser. The lens system is used to image the image of the fiber end face on the heated object, and the focusing range is 6.5-70mm. Then the trajectory is optimized in the non-sequential mode of ZEMAX. The system uses five lenses and uses a cam structure to achieve zoom. A laser homogenizing zoom system with adjustable spot size in the continuous range of 12mm-151mm at a distance of 1.5m was designed, and the mechanical structure was designed. The system structure is simple, and the uniformity can reach more than 86% in all spot size ranges
Blue semiconductor lasers have broad application prospects in fields such as material processing, underwater communication, and ocean exploration due to their unique wavelength advantages. At present, the power of blue light single tube LDs is relatively low. By using incoherent laser beam combining technology and fiber coupling technology, multiple blue light LDs can be synthesized into a high-power and high uniformity laser, meeting a wider range of application needs. This article designs a 100W level blue light LD fiber coupling module, which uses 32 single tubes with a power of 5W LDs. Through spatial and polarization beam combining design, it is focused and coupled into 105 μm/NA0.22 optical fiber. After simulation with Zemax software, a 138.7 W high brightness blue laser was obtained, with a fiber coupling efficiency of 91.48%. A dual axial flow fan air-cooled heat dissipation structure has been designed. After simulation with Ansys Icepak software, the maximum temperature of the laser module is 35.1 °C, and it can continuously output light for operation.
In this paper, hydrophilicity after nanosecond pulsed laser cleaning of lubricating oil on the surface of DC04 steel was investigated. Influencing parameters of temperature field distribution and ablation depth on laser cleaned steel surface were simulated by using COMSOL Multiphysics software; The results show that when the average laser power is 50 W, the ablation depth of the steel surface gradually increases with the decrease of the laser scanning speed, and the increase of the ablation depth leads to the decrease of the contact angle of the steel surface. Subsequently, an experimental study of nanosecond pulsed laser cleaning of DC04 steel surfaces was carried out. The results show that the contact angle of the steel surface shows a tendency of decreasing and then increasing with the increase of the laser scanning speed. When the average laser power was 50W, the scanning pitch was 0.03mm and the scanning speed was 500mm/s, the lubricant on the steel surface was cleaned and had the best hydrophilicity on the surface. The static contact angle of the steel surface changed from the original 84° to 18°.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.