In order to improve ranging accuracy and make high-orbit satellites or lunar laser ranging, in the 1.2 m telescope laser ranging system to develop long-range and high precision laser ranging technology has important practical significance. Under the support of the National Natural Sciences Foundation important project of astronomy and the Chinese Academy of Sciences Fund for the knowledge innovation project young talents areas forefront project special funds, the author systematically and deeply researched Event Timer (ET) design principle and technology realization and in the 1.2m telescope laser ranging system firstly realized high efficiency and high accuracy control system based on ET. As follows: Firstly, systematically studied ET principle and realization method and researched and made OTL110P ET，which is first made in the domestic laser ranging field. This instrument has two kinds of work mode, time interval measurement and event epoch measurement. Test results show that: its time resolution is 4ps，dead time is , standard deviation is better than 50ps，system error is less than 11ps，measuring range is 24h. Therefore, its capability meets to long-range and high-repetition laser ranging, is also applicable to the traditional satellite laser ranging (SLR)，measurement accuracy up to sub-cm order. Secondly, the first time realized a new ranging control system for 1.2m telescope common optical road laser ranging system when OTL110P ET is set to time interval measurement work mode. The traditional laser ranging system that is currently using could not interface directly with ET, need to design a new interface and new range gate technology. This study have made a new development to control circuits, software and observing application interface, and finally realized the ranging control system when OTL110P ET’s work mode is time interval measure. Observing the control signals of the new control system using a logical analysis, the results show that: the control signals in strict accordance with the 1.2m telescope common optical road laser ranging system timing requirements generated, thus greatly improving the ranging accuracy. Finally, proposed a ranging gate generated method in high-repetition laser ranging. Under the time interval measurement work mode, OTL110P ET has not really played its strengths, but also in the 1.2m telescope laser ranging system realization high-frequency ranging system is the follow-up goal of this study, this required to develop a new ranging gate generated technology. Ranging gate generated through above method has about dozens ns precision. This research in the 1.2m telescope laser ranging system first realized high-precision and high-efficiency control system which is based on ET, for future to realize high-repetition ranging technology in this ranging system did a full technical preparation.
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