Laser feedback precision measurement and applications
The theoretical model of laser feedback interferometry was introduced,and the technical characteristics of laser feedback measurement such as high sensitivity,simple device structure,self-aligning,and the ability to achieve pre-cise measurements of non-cooperative targets were explained.Various applications of laser feedback measurement in in-dustrial and research domains were explored,including displacement measurement,angle measurement,vibration mea-surement,and absolute distance measurement.It is pointed out that the use of structures like harmonic reuse,frequency reuse,polarization reuse,and full-path coherent combining can enhance the application performance of feedback measure-ment.The advantages of laser feedback measurement compared to traditional interferometric measurement methods were discussed,as well as their application prospects in scientific research,industrial production,and precision manufacturing.Methods such as improving the frequency stability accuracy of light sources,studying experimental phenomena and theo-retical models at different levels of optical feedback,and exploring feedback effects of new lasers were proposed to further enhance the sensitivity and measurement performance of laser feedback interferometers.
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