WANG Guo-li, GUO Heng-qun, SU Pei-lin, ZHANG Chun-hua, WANG Qi-ming, XU Jun, CHEN Kun-ji. Passive Q-switching and Mode Locking of Pulsed Nd:YAG Laser with nc-Si/SiN<sub>x</sub> Multilayer[J]. Chinese Journal of Luminescence, 2008,29(5): 905-909
WANG Guo-li, GUO Heng-qun, SU Pei-lin, ZHANG Chun-hua, WANG Qi-ming, XU Jun, CHEN Kun-ji. Passive Q-switching and Mode Locking of Pulsed Nd:YAG Laser with nc-Si/SiN<sub>x</sub> Multilayer[J]. Chinese Journal of Luminescence, 2008,29(5): 905-909DOI:
superlattice was prepared by RFmagnetron reaction sputtering technique and thermal annealing
which made Si nanocrystals appear in the a-Si films.In the experiment
the sample was inserted as saturable absorber into the resonator of Nd:YAG laser.The passive Q-switched operation of 1064 nm laser was achieved when cavity-length was short
and a single pulse waveform of 23 ns-wide was measured.In addition
a single pulse train with average pulse duration of 35 ps was obtained when the cavity-length was set to 124 cm.With the experiment phenomenon and the structure of film
the dynamics of the pulses formation is described;it was mainly ascribed to two-photon saturable absorption and fast relaxation processes of carriers excited in the nano-silicon with quantized states and interface states.The Q-switched output performance in different operating conditions was investigated by the way.