标题：Monolithic waveguide laser mode-locked by embedded Ag nanoparticles operating at 1 μm
作者：Li, Rang ;Pang, Chi ;Li, Ziqi ;Dong, Ningning ;Wang, Jun ;Ren, Feng ;Akhmadaliev, Shavkat ;Zhou, Shengqiang ;Chen, Feng
作者机构：[Li, Rang ;Pang, Chi ;Li, Ziqi ;Chen, Feng ] School of Physics, State Key Laboratory of Crystal Materials, Shandong University, 27 Shan Da Nan Lu, Jin 更多
摘要：Monolithic waveguide laser devices are required to achieve on-chip lasing. In this work, a new design of a monolithic device with embedded Ag nanoparticles (NPs) plus the Nd:YAG ridge waveguide has been proposed and implemented. By using Ag+ ion implantation, the embedded Ag NPs are synthesized on the near-surface region of the Nd:YAG crystal, resulting in the significant enhancement of the optical nonlinearity of Nd:YAG and offering saturable absorption properties of the crystal at a wide wavelength band. The subsequent processing of the O5+ ion implantation and diamond saw dicing of crystal finally leads to the fabrication of monolithic waveguide with embedded Ag NPs. Under an optical pump, the Q-switched mode-locked waveguide lasers operating at 1 μm is realized with the pulse duration of 29.5 ps and fundamental repetition rate of 10.53 GHz, owing to the modulation of Ag NPs through evanescent field interaction with waveguide modes. This work introduces a new approach in the application of monolithic ultrafast laser devices by using embedded metallic NPs.
© 2019 Feng Chen et al., published by De Gruyter, Berlin/Boston 2019.