Development of A Semiconductor Laser Based High Temperature Fine Thermal Energy Source in an Optical Fiber Tip for Clinical Applications

概要

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A new technique for generating high temperatures on the surface of an optical fiber is developed for medical applications using lower-power semiconductor lasers with output powers lower than 10 W. Using a power level of 4--6 W semiconductor laser with a pulse duration of 180 ms at a wavelength of 980 nm, a laser-coupled fiber tip was once processed to contain a certain amount of Ti with a depth of 100 μm from the tip surface so that the laser energy could be efficiently absorbed to be transferred to thermal energy. With consecutive laser pulse irradiation, the tip processed fiber (TP fiber) served as a reproducible fine heat source whose temperature was measured to be in excess 3100 K based on two-color thermometry. Processing of ceramic and niobium plate, which are hardly ablated with direct low power (6 W) irradiation, was successfully demonstrated by contacting the TP fiber excited with the same power.
2013-05-25