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Many applications now require micro sized holes that are difficult to produce with conventional methods. The ultra-short pulse lasers that are normally used are extremely expensive and require many pulses to remove the material due to the small amount of energy they deposit. The feasibility of using a continuous-wave fiber laser to perform ablation is investigated. The fiber laser has excellent beam quality and can be modulated to operate at different pulse widths and repetition rates. Results show that a pulse of 18 µs produces the optimum hole characteristics. Also, the removal rate is superior to other lasers used for laser ablation. A though-hole was generated in a piece of stainless steel 100 mm thick using seven pulses.Many applications now require micro sized holes that are difficult to produce with conventional methods. The ultra-short pulse lasers that are normally used are extremely expensive and require many pulses to remove the material due to the small amount of energy they deposit. The feasibility of using a continuous-wave fiber laser to perform ablation is investigated. The fiber laser has excellent beam quality and can be modulated to operate at different pulse widths and repetition rates. Results show that a pulse of 18 µs produces the optimum hole characteristics. Also, the removal rate is superior to other lasers used for laser ablation. A though-hole was generated in a piece of stainless steel 100 mm thick using seven pulses.

Feasibility study of laser ablation using long-pulsed, 300W, CW single-mode fiber laser