Method for installing and debugging femtosecond laser oscillator

The invention discloses a method for debugging a femtosecond laser oscillator. The femtosecond laser oscillator comprises one 532 nm pumping source, two 532 nm reflectors, one focusing lens and one femtosecond laser resonant cavity, wherein the femtosecond laser resonant cavity comprises two concave mirrors, one Ti sapphire crystal, two prisms, four total reflection mirrors and one output mirror. The method particularly includes the following debugging steps: all lenses except for the one focusing lens and the two concave mirrors are welded to a mirror support, wherein it is guaranteed that all lenses are the same in center height, and the lenses are perpendicular to a horizontal face; the welded lenses are fixed to a base plate of the oscillator according to design, the one focusing lens and the two concave mirrors are clamped to the preset positions through three five-dimensional adjustable tools respectively, and front-and-back adjustment, left-and-right adjustment, up-and-down adjustment, pitching adjustment and deflection adjustment can be carried out through the five-dimensional adjustable tools; the two 532 nm reflectors and the one focusing lens are used for focusing 532 pumping light to a laser crystal; deflection of all lenses in the femtosecond laser resonant cavity is carefully adjusted to enable the femtosecond laser resonant cavity to output continuous lasers.