T-type Raman spectroscopy method for determining laser absorption, thermal conductivity and air heat transfer coefficient of microano fibers

摘要

The accurate thermal property characterization of microano fibers is crucial for precise microano technology. We developed a non-contact T-type Raman spectroscopy method for combined determina-tion of microano fibers' laser absorption, thermal conductivity and air heat transfer coefficient. The accuracy of laser absorption measurement is independent of the fiber properties or thermal contact resistance. When determining the thermal conductivity, the thermal contact resistance can be easily eliminated. Moreover, the air heat transfer coefficient is determined based on the accurate laser absorp-tion and thermal conductivity data of the same sample. Case studies show that this method is sensitive and accurate for microano fiber characterization.