Experimental research of gamma-ray radiation of the key components in optical satellite communication system

To verify the potential space radiation-induced degradation of optical satellite communication system, the γ ray radiation experiments of its key components have been developed. No obvious performance degradations of the DFB laser and photo detector module were found at the total dose less than 150 krad. The EDFA seems to be the most radiation sensitive, and it comes to its malfunction through the radiation of 16.2 krad. It is believed that the high energy particles’ radiation effect should be first considered when it refers to the optical terminals’ applications in the space.