Electro-optic Q-switching double-frequency double-pulse laser lithotripsy system

An electro-optic Q-switching double-frequency double-pulse laser lithotripsy system, comprising a total reflection mirror (1), an electro-optic Q-switching assembly, a drive circuit (4), a controller (14), a pump source (13), a gain medium (6), an output mirror (7), a first focusing mirror (8), a frequency doubling crystal (12), a second focusing mirror (9), a coupling lens (10) and an output optical fiber (11), wherein the electro-optic Q-switching assembly and the gain medium (6) are located between the total reflection mirror (1) and the output mirror (7);

• the drive circuit (4) is connected to the electro-optic Q-switching assembly;
• and the controller (14) is connected to the electro-optic Q-switching assembly and the pump source (13), the controller (14) controls the pump source (13) to work, and the controller (14) controls a voltage of the electro-optic Q-switching assembly by controlling the drive circuit (4);
• and
• the controller (14) controls the pump source (13) to generate pump light to irradiate the gain medium (6);
• the controller (14) controls the drive circuit (4);
• when a voltage difference exists on the electro-optic Q-switching assembly, an optical resonant cavity is formed between the total reflection mirror (1) and the output mirror (7);
• when the pump light passes through the optical resonant cavity and a gain of the pump light reaches a threshold, a laser beam is output by the output mirror (7);
• the laser beam is sequentially converged by the first focusing mirror (8), partially doubled in frequency by the frequency doubling crystal (12), and then emitted in parallel via the second focusing mirror (9), converged and coupled by the coupling lens (10), and output through the output optical fiber (11);
• and the laser beam is a dynamic laser beam with a pulse width of 1 μs-1.5 μs or a static laser beam with a pulse width of 200 μs-300 μs.