Abstract: The D-D filled capsule implosion experiment is performed on Shenguang Ⅲ prototype laser facility. One-dimensional hydrodynamic numerical simulations show that neutron yield mechanism can be controlled by different D-D gas pressure and CH shell thickness. In experiments, the high gas filling pressure and thin shell thickness capsule is proposed for shock yield only implosion design. Meantime, many important implosion parameters such as neutron yield, bang-time are collected. The optimized experimental neutron yield is 9.9107 (9.7%) and the ratio between the experimental value and the 1D simulated value reached 90%. On the other hand, two types of unregular targets (extra high asymmetry and RT instability) are designed and experiments are proposed. The experimental results show that the multi-dimensional factors have little influence on implosion performance. Finally, the quasi-one-dimensional implosion is achieved based on high pressure and thin shell target.