New approach to construction of the compact femtosecond system is proposed. This system can provide less than 50 fs light pulses with up to 100 (mu) J energy and more than 500 Hz repetition rate in visible, near UV and IR spectral regions. There are some essential advantages of this system in comparison with traditional solid state amplifiers schemes. First of them is a possibility of self-selection of incident femtosecond pulses, second is a self isolation of amplifier from master oscillator. Than, weak self phase modulation and chirp broadening of pulses in thin dye cells which promise us to use simple prism pulse compressor, and finely is an amplification second harmonic radiation (violet-blue radiation). Amplified violet-blue femtosecond pulses can be used than for pumping of optical parametric oscillators (OPO) and amplifiers (OPA) on the base of LBO, BBO or LiJO3 crystals. Femtosecond pulses at the signal frequency from that OPO can be also amplified in multipass dye cells, pumped by the same N2 laser. Because beams in channels are simultaneously, it not need to use in this scheme start discharge electronic synchronization systems. Amplifiers parameters estimates give reason to expect that this version of femtosecond system will have smaller sizes and price in comparison with well known existing now on the market femtosecond systems, which provide femtosecond pulses less than 50 fs, with energy up to 100 (mu) J and repetition rate more than 500 Hz in visible, near UV and IR spectral regions.