  We report on fabrication of a microtoroid resonator of a high-quality factor
(i. e., Q-factor of ~3.24x10^6 measured under the critical coupling condition)
using femtosecond laser three-dimensional (3D) micromachining. Coupling of
light into and out of the microresonator has been realized with a fiber taper
that is reliably assembled with the microtoroid. The assembly of the fiber
taper to the microtoroid is achieved by welding the fiber taper onto the
sidewall of the microtoroid using CO2 laser irradiation. The integrated
microresonator maintains a high Q-factor of 3.21x10^5 as measured in air.
