1. School of Information Science and Engineering, Shandong University, Jinan, 250100, China 2. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China
Abstract:
A novel composite partially deuterated KDP crystal used for frequency tripling is experimentally demonstrated for the first time in this paper. The deuteration level is used as a degree of freedom to alter the phase matching wavelength so as to increase the bandwidth acceptance. The results show that the acceptance bandwidth based on such crystal can be increased by a factor of 3 comparing with the conventional method. The obtained results are very useful to develop frequency tripling components in broadband third harmonic generation.