A fiber-optic probe diagnostic system has been developed for measuring shock arrival time by taking advantage of shock-induced luminescence of fused quartz. When the shock front reaches the tip of the fiber probe,an intense optic pulse is produced. The visible pulse is transmitted via fiber to an opto-electrical converter then to oscillograph for recording. The shock arrival times can be gotten by reading the signals recorded in oscillograph. The fiber-probe is passive and electromagnetic interference immunity,whose response time can reach sub-nanosecond. Metal and nonmetal materials can be directly measured by this sensor. At present,the probe has been greatly applied in the detonation testing experiments. This article introduces the fiber-sensor applications,such as the shock wave velocity of LY12 sample,the flatness of Mylar film loaded by electric blasting,and the detonation wave profile of GI-920 explosion.