It is well known that semiconductor lasers have a great importance in our daily life. We can’t imagine a day without our computer or without sending and receiving messages. Semiconductor lasers have wide applications in communications, medicine, industry, etc. Under the influence of external feedback such lasers can generate a chaotic behavior appropriate for chaos based communication (CBC). In this paper we present the new scheme of a semiconductor laser with active medium quantum dots and a feedback which comes from five external mirrors (see Fig. 1). The first mirror is placed at distance L from the back facet of laser. The distance between mirrors is chosen also L.    We analyzed the dynamics of a semiconductor laser with active medium quantum dots using the following model [1], [2]  where E is the complex amplitude of the electric field, ρ the occupation probability in the quantum dot, and N the density of carriers.     Figure 2 shows the evolution in time of output power (left) and the portrait phase (right) in the chaotic regime. Thus, in this paper, we studied the dynamics behavior of a semiconductor laser with active medium quantum dots under the influence of a optical feedback from external multiple cavities. We show the advantage of this scheme compared to that of conventional optical feedback. The appearance of a chaotic behavior appropriate for CBC takes place at low values of cavity length, which makes the device more compact.