Spectral narrowing of XeF(C-A) blue-green lasers using prism dispersive resonator

As the gain coefficient of XeF(C-A) blue-green lasers is low, it is difficult to obtain a laser pulse with both high energy and narrow spectrum. In this paper, a dispersive prism is used in the resonator to compress the laser spectrum and to get high laser pulse energy. The experimental results show that, using a concave output mirror, the laser spectrum can be compressed to about 2.5 nm and the maximal laser energy is 3.47 J. As a comparison, using a plane output mirror, the laser spectrum can be compressed to about 0.7 nm with the laser pulse energy of 2.93 J. In the expriment, the laser spectrum can be tunable between 460 nm and 520 nm and the tunable width is about 60 nm.