By altering the wavelength of light, researchers have developed a method of welding transparent plastics together without the need for added absorbers.
Because soot particles must be used to absorb the radiation, conventional laser welding of plastic are usually limited to joining transparent plastic to black plastic. Researchers from Germany’s Fraunhofer Institute for Laser Technology studied a variety of transparent polymers to determine at what wavelengths they themselves absorbed radiation and then developed a laser that emits that particular wavelength, eliminating the need for soot or expensive alternatives.
The new technology could be applied in the production of microfluidic lab-on-a-chip devices.
Because soot particles must be used to absorb the radiation, conventional laser welding of plastic are usually limited to joining transparent plastic to black plastic. Researchers from Germany’s Fraunhofer Institute for Laser Technology studied a variety of transparent polymers to determine at what wavelengths they themselves absorbed radiation and then developed a laser that emits that particular wavelength, eliminating the need for soot or expensive alternatives.
The new technology could be applied in the production of microfluidic lab-on-a-chip devices.
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