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采用H-S波前传感器对于非稳腔进行了实验调腔技术研究,指出了正支共焦腔调腔的原则,以输出光束近场强度和相位分布这一双重依据作为谐振腔是否调好的标准。进行非稳腔调腔时,首先应当保证整个光路共光轴使输出强度分布均匀,但此时光束中可能还包含离焦等高阶像差,因此在腔外用Hartmann-Shack波前传感器进行光束相位测量,得到了35阶像差Zernike系数、波面PV和RMS值,进一步计算得到远场分布和环围能量曲线等。从而可以全面了解输出光束质量,并能有针对性地对光腔进行调整,从而达到较理想的光腔调整共轴状态。
The H-S wavefront sensor was used to study the cavity-adjusting technique in unstable cavity. The principle of cavity-adjusting with positive-branch confocal cavity was pointed out, and the double-basis of output beam near-field intensity and phase distribution was used as the criterion for tuning the resonator. The first step should be to ensure that the total optical axis of the entire optical path will make the output intensity uniform, but at this time, the beam may also contain higher-order aberrations such as defocus. Therefore, the Hartmann-Shack wavefront sensor The 35-order aberration Zernike coefficients, wavefront PV and RMS values were obtained, and the far-field distribution and the surrounding energy curve were further calculated. Which can fully understand the quality of the output beam, and can be targeted to adjust the optical cavity, so as to achieve the ideal optical cavity to adjust the coaxial state.