83W, 3.1 MHz, square-shaped, 1 ns-pulsed all-fiber-integrated laser for micromachining
Optical Society of American (OSA)
17647 - 17652
MetadataShow full item record
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/21817
We demonstrate an all-fiber-integrated laser based on off-theshelf components producing square-shaped, 1 ns-long pulses at 1.03 μm wavelength with 3.1 MHz repetition rate and 83 W of average power. The master-oscillator power-amplifier system is seeded by a fiber oscillator utilizing a nonlinear optical loop mirror and producing incompressible pulses. A simple technique is employed to demonstrate that the pulses indeed have a random chirp.We propose that the long pulse duration should result in more efficient material removal relative to picosecond pulses, while being short enough to minimize heat effects, relative to nanosecond pulses commonly used in micromachining. Micromachining of Ti surfaces using 0.1 ns, 1 ns and 100 ns pulses supports these expectations. © 2011 Optical Society of America.