Abstract: Multi-color random lasers have shown potential applications for sensing, imaging and photonic chips due to the low cost, small size, easy integration, and high performance. It is one of the most important fields of random lasers. Two challenges still remain in developing the laser devices. One is the realization of the efficient single-excitation pumping. The other is the broadening of the range of laser wavelength. The energy transfer between different gain media is a promising candidate for solving the problems. This paper reviews the design, fabrication, and spectroscopy characteristics of multi-color random lasers based on the radiation/resonance energy transfer. The relationship between the donor/acceptor ratio and the pump is revealed. At last, the development tendency of multi-color random lasers is provided.

Key words: random lasers; multi-color; energy transfer