Systems and methods for fluid or structure surface disinfection using deep UV picosecond laser

A system for fluid or structure surface disinfection, comprising:

• a laser source configured to generate a laser stream;
• a detection module configured to detect shape and size of a portion of a surface of a structure;
• an optical module configured to shape the laser stream, direct the laser stream toward the portion of the surface of the structure, and generate a series of focused laser spots on a target object under disinfection;
• and
• a controller coupled to the optical module and configured to:
• control the optical module to direct the laser stream toward the portion of the surface of the structure;
• and
• determine a disinfection efficiency based on a disinfection effect of the target object, compare the disinfection efficiency with a predefined efficiency threshold, and, in response to the disinfection efficiency being less than the predefined efficiency threshold, increase a power of the laser stream and adjust a degree of overlapping between adjacent focused laser spots on the target object under disinfection.