Unstable resonator automatic cavity-adjusting system and method using self-collimation feedback light path
An unstable cavity and self-collimation technology, applied in the field of lasers, can solve the problems of fresnel diffraction core formation, cumbersome adjustment, slow adjustment speed, etc., to achieve the improvement of output beam quality and energy extraction efficiency, guaranteeing Integrity, the effect of increasing precision
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[0041] Example 1
[0042] As shown in Fig. 4, it is an embodiment of the present invention for a positive-branch confocal unstable cavity. As shown in the figure, the present invention uses a self-collimating feedback optical path for a laser forward-branch confocal non-stable cavity automatic cavity adjustment system. The aberration detection system is a laser plane interferometer 101, and the output signal light is a beam of parallel light with a wavelength of 632.8 nm. The data analysis system 6 and the cavity mirror control system 7 are implemented by a computer 14, that is, the system includes a laser plane interferometer 101, an unstable cavity mirror, a feedback mirror 5, a computer 14 and a laser base 9. The unstable cavity mirror includes a second cavity mirror 4, an output coupling mirror 2, and a first cavity mirror 3. The first cavity mirror 3 is a concave mirror, the second cavity mirror 4 is a convex mirror, and the output coupling mirror 2 is placed in the first cav...
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[0067] Example 2
[0068] As shown in FIG. 5, it is another embodiment of the present invention for a positively branched confocal unstable cavity. As shown in the figure, the present invention uses a laser positive-branch confocal non-stable cavity auto-tuning system with a self-collimation feedback optical path. The structure of the non-stable cavity mirror is the same as that of the first embodiment. The difference from the first embodiment is the image A difference detection system. The aberration detection system 1 is composed of a He-Ne laser 102, a collimator 103, a beam splitter 104, and a Hartmann wavefront sensor (or shearing interferometer) 105. The optical axis 12 of the He-Ne laser 102 and the collimator 103 are perpendicular to the optical axis 11 of the unstable cavity, and the beam splitter 104 is between the collimator 103 and the output coupling mirror 2, and is 45 with the optical axis 11 of the unstable cavity. The Hartmann wavefront sensor 105 is placed in the...
Example Embodiment
[0076] Example 3
[0077] As shown in Fig. 6, it is an embodiment of the present invention for a negative-branch confocal unstable cavity. As shown in the figure, the present invention uses a laser negative-branch confocal non-stable cavity auto-tuning system with a self-collimating feedback optical path. Its aberration detection system is a laser plane interferometer 101, and the output signal light is a parallel light. The wavelength is 632.8nm. The data analysis system 6 and the cavity mirror control system 7 are realized by a computer 14, that is, the system includes a laser plane interferometer 101, an unstable cavity mirror, a feedback mirror 5, a computer 14 and a laser base 9. The unstable cavity mirror includes a second cavity mirror 4, an output coupling mirror 2 and a first cavity mirror 3. The first cavity mirror 3 and the second cavity mirror 4 are both concave mirrors, and the output coupling mirror 2 is placed in the second cavity mirror 4. Between the first cavity ...
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