ELECTRO-OPTICAL Q-SWITCH DOUBLE-FREQUENCY DOUBLE-PULSE LASER LITHOTRIPSY SYSTEM

摘要

An electro-optical Q-switch double-frequency double-pulse laser lithotripsy system, comprising a total reflector (1), an electro-optical Q-switch switch component, a driving 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). The electro-optical Q-switch switch component and the gain medium (6) are positioned between the total reflector (1) and the output mirror (7); the controller (14) controls the pump source (13) to work, and controls the voltage on the electro-optical Q-switch switch component by controlling the driving circuit (4) so that the system outputs a double-frequency laser beam with a pulse width between 1 and 1.5 μs or between 200 and 300 μs. According to the system, the calculus with larger size can be crushed, the cutting of soft tissues around the calculus can be achieved, the electro-optical efficiency is high, the pulse width is easy to change, and the method is suitable for clinical use.