Solar excited laser (SEL) using semiconductor material is proposed for wireless energy distribution system with laser light in space. The SEL converts solar light directly to laser light suitable for long-distant transmission. Semiconductor has high controllability of its optical and electrical functions which can be utilized for realization of the SEL. AlGaAs system is taken as an appropriate material for highly efficient conversion. Potential structure of the laser device is discussed from aspects of absorption of the solar light and transfer of the produced carrier into the active layer emitting laser light. Non-linear graded potential is mentioned as a possibility to enhance the performance for the first time.