公开(公告)号：US20220100049A1

公开(公告)日：2022-03-31

申请号：US17483231

申请日：2021-09-23

申请人： Shanxi University

发明人： Kuanshou Zhang ,  Jinxia Feng ,  Yuanji Li ,  Zhenyu Jiang

IPC分类号： G02F1/35

摘要： An integral optical resonant cavity for frequency conversion is provided. The integral optical resonant cavity includes: a housing, a cavity-length adjustment device, a temperature control device and a nonlinear crystal provided in the temperature control device; a first plano-concave mirror and a second plano-concave mirror included in the cavity-length adjustment device and a nonlinear crystal form the optical resonant cavity; and light passes through the first plano-concave mirror, the nonlinear crystal and the second plano-concave mirror sequentially. The stability of the length of the optical resonant cavity is improved through an integral design thereof, and the stability of the temperature of the nonlinear crystal in the integral optical resonant cavity is improved through the temperature control device, thereby stably controlling relative phases between light fields for the frequency conversion in the resonant cavity. Meanwhile, the length of the integral optical resonant cavity is accurately controlled through the cavity-length adjustment device.

公开(公告)号：US10164401B1

公开(公告)日：2018-12-25

申请号：US15865782

申请日：2018-01-09

申请人： Shanxi University

发明人： Kuanshou Zhang ,  Xin Zhao ,  Yuanji Li ,  Jinxia Feng

IPC分类号： H01S3/115 ,  H01S3/0941 ,  H01S3/107

摘要： A method is disclosed for generating a sub-nanosecond pulse laser, using a voltage-increased type electro-optical Q-switched laser. The method includes: applying a square wave driving signal on a Pockels cell in an electro-optical Q-switched laser by using a Q-switch driver module, where the peak voltage of the square wave driving signal is higher than the quarter-wave voltage of the Pockels cell; and performing, by controlling the loss related to the electro-optical Q switch with a voltage of the driving signal increasing from 0 to the peak voltage, a change of the working state of the electro-optical Q switch from a switched-off state to a switched-on state, and then to a partially-switched-on state. The intracavity laser is exhausted within a quite short time, so that the pulse width of the laser is shortened, to implement sub-nanosecond operation of a pulse laser.