The accurate measurement of absorbed laser energy by a single
carbon fiber is the key factor of Raman measurement. In this paper,
a new method combining Raman and electrical measurements has
been developed to determine the optical absorption and heat
transfer coefficients simultaneously. The Raman frequency shift
is used to monitor the temperature rise of the laser spot, while
the accurately measured electrical power serves as a reference to
extract the precise value of the absorbed laser energy. The experimental
results indicate that the optical absorption of 4.3 lm diameter
carbon fiber is 39.62% and the heat transfer coefficient is
4150Wm2 K1, which agrees well with the prediction of published
experimental empirical formula