We will review the latest progress of the improvement of supercontinuum (SC) characteristics in highly nonlinear fibers. We will present our results on the use of the CW trigger to control the SC generation with different pump sources. A weak CW trigger can manipulate the behaviors of optical rogue waves in the SC regime. For the proposed CW triggering technique which requires only wavelength tuning and is a handy approach for the active control of SC, the resultant spectrum can be greatly broadened, and the noise properties of the SC can be significantly improved in terms of both of the coherence and intensity stability.