Recently, scientists have developed new fiber laser systems capable of killing bacterial superbugs and spores. Bacteria that threaten human life adapt to medicines, including antibiotics. This prompted developers to explore alternative treatments. In some cases, the solution is a special ultrashort-pulse fiber laser.
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Fiber laser systems kill bacteria
Fiber laser modules’ effects
Researchers in the United States discovered that fiber lasers emitting ultrashort pulses can eliminate drug-resistant bacteria. They studied the germicidal properties of ultrashort-pulse lasers and found that fiber laser modules can inactivate bacteria and viruses without harming human cells. They tested common viruses and bacteria, including those causing skin, organ, urinary tract, and wound infections, as well as spores responsible for food spoilage and poisoning, some of which resist cooking and boiling.
How it works
All bacteria and viruses contain protein structures. The ultrashort-pulse fiber laser makes these structures vibrate until molecular bonds break, causing faulty linkages that stop normal protein function.
Importance of laser power
To achieve the desired results, scientists must provide precise laser power. Different pathogens require specific laser powers. If the power is too high, human cells can be damaged. Therefore, there is an optimal power range that destroys pathogens while keeping human cells intact.
Future of this fiber laser technology
Developers envision ultrashort-pulse fiber laser technology as a way to inactivate pathogens while preserving human proteins and cells. It could disinfect surgical wounds or treat bloodstream infections. This technology may also replace harmful chemicals like bleach or radiation, providing safer handling of biological and blood products.
Results show fiber lasers can kill about 99.9% of target bacteria and reduce their quantity by 1,000 times, without harming human cells, making them suitable for wound sterilization and disinfection.