Device and method for high rate optical transmission and use of said device and method

The invention relates to an is light transmitting data network signal transmission device, the device comprises a pulse (10) and at least one wire optical fibre (12), the optical-fibre ring transmitting at least pulse, wherein the device further - comprising with a broadcast and linear broadcast device linear pulse stretcher module (14), wherein accumulation compensating is high enough can reduce the top power to the lower than the preset threshold value, is larger than that the threshold value the signal is easy for receiving the nonlinear for the wire optical fibre. The expanded module (14) is arranged between the emitter (10) and wire optical fibres (12).