| Summary: | 碩士 === 國立臺灣大學 === 機械工程學研究所 === 100 === The development of ultra-fast technology has given a brand new approach in laser fabricating applications. With this technology featuring with the principles of single photon absorption and multi-photon absorption, machining any kind of transparent or opaque materials is now available and has superior advantages of small thermal effected zone and high machining precision.
In real world, however, there are kinds of factors that may be able to degrade the laser pointing stability, such as mechanical vibration, air flow disturbance, variation in ambient temperature and humidity, etc. Those factors may degrade the precision in ultra-fast laser fabrication.
The main purpose in this thesis is to observe the correlation of laser pointing stability and laser fabrication result and make an assessment of influence of laser instability in ultra-fast laser fabrication regime. Moreover, with the adjusted laser pointing stabilization system in this work, finding the relationship of laser pointing instability with machining result by making worse laser pointing condition with the fast steering mirror in the system is the second objective in this thesis.
With the relation of laser pointing and laser machining result, it may provide a new reference to those want to build up a laser pointing stabilization system in ultra-fast laser fabricating regime.
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