Product Code: ICAL08_M406

Deep Microdrilling by Femtosecond Laser Pulses Delivered Through Hollow Core Fiber
Authors:
B.T. Kim, Kansas State University; Manhattan KS USA
Q. Bian, Kansas State University; Manhattan KS USA
S. Chen, Kansas State University; Manhattan KS USA
S. Lei, Kansas State University; Manhattan KS USA
Z. Chang, Kansas State University; Manhattan KS USA
Presented at ICALEO 2008

Femtosecond laser drilling of high aspect ratio microholes using laser pulses delivered through hollow core fiber is presented. The purpose is to study the feasibility of the process and the quality of the microholes. The microdrilling is performed using a Ti: Sapphire laser with a wavelength of 790 nm and a repetition rate of 1 kHz. The hollow core diameter of the fiber is 150 m. The effects of various parameters (pulse energy, pulse duration, polarization) on the pulse-fiber coupling efficiency and hole quality are investigated. Microholes of 100-200 m in diameter and 1 mm deep are drilled in steel and tungsten carbide samples. The hole quality is examined using optical microscope and SEM.