Experimental Study of Nanosecond Pulsed Fiber Laser Micro-Drilling on Quartz

A nanosecond pulsed fiber laser system with an average power of 50 W is utilized in the present research work to generate micro-holes on a transparent quartz material for utilization in optoelectronics. The effect of laser power, pulse frequency, duty cycle, and air pressure on the entry hole circularity of micro-holes on quartz is analyzed with the aid of response surface methodology (RSM). The developed mathematical model for the entry hole circularity is validated through ANOVA analysis for the adequacy of the experimental model. The present research aims to bring about the utilization of nanosecond pulsed fiber laser systems to generate micro-holes on quartz at the fundamental wavelength, i.e., 1,064 nm. The experimental results show that the combination of pulse frequency of 65 kHz, a duty cycle of 50%, laser power of 37 W, and air pressure of 2.50 kgf/cm2 266leads to the maximum circularity of 0.88 at entry side. The conformity tests reveal that the error for circularity is found out to be 3.23%, and the predicted result in a very close agreement with the experimental results.