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With the development of semiconductor laser technology, laser proximity fuzes have been widely used in various kinds of guided missiles and routine ammunitions. An approach to pulsed laser fuze based on pseudorandom code is presented in this paper. Based on the principle of laser fuze using pseudorandom code, the system has been divided into emitting module, receiving module, optical system and information processing module. The different modules have been analyzed in details and principles for selecting the parameters of the modules are given. The testing shows that laser fuze based on pseudorandom code has a better ability of detection and a higher resistance to interference. The theoretic foundation is provided for scientifically designing pulsed laser fuze of pseudorandom code.

Laser ranging is to measure the distance of a target with laser beam. Having the advantages of narrow beam and strong resistance to electromagnetic interference, it has been developed and researched by many countries. Because of the complexity of backgrounds and targets, it is necessary to research the related laser echo characteristics. The power, waveform and other identities of laser pulse echo from targets are analyzed based on the experimental results of the laser ranging system. Valuable conclusions were drawn for the laser echo characteristics for different materials.