The synthesis of a nearly four-optical-cycle (14 fs) laser pulse from the coherent combination of dual femtosecond laser pulses with a femtosecond amplifier system is reported. The simulation confirms that the scheme is a viable method to produce few-cycle optical pulses. A Yb3+-doped femtosecond laser fiber amplifier generates 62 fs transform-limited pulses with 1040 nm central wavelength. These pulses are split in two. One is employed as fundamental soliton pulses, the other is coupled into all-solid-state photonic bandgap fiber. The parameters are optimized such as the input power to obtain the 55 fs near transform- limited self- frequency- shifted solitons centered at 1150 nm wavelength. A nearly four-optical-cycle (14 fs) laser pulse is combined via coherent synthesis of the fundamental soliton and the self-frequency-shifted soliton.