Development of the angular multipexing system of the MOPA in HeavenI

The angular multipexing system is the chief part in the MOPA. It links the mainoscillator, preamplifier and main amplifier up together, and acts as a laser pulse wide compressor. The angular multipexing system can make full use of the electron energy in the cavity of preamplifier and main amplifier and the electron pulse width to amplify mainoscillator laser pulse in order to improve the power density on the target.The configuration of the angular multipexing system of the MOPA used in HeavenI is introduced in this article. Some advices are given to make an optimization based on the its performance in these year．