| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5390395 | Chemical Physics Letters | 2006 | 5 Pages |
Abstract
We report on the influence of pulse duration, bandwidth, and phase shaping on femtosecond laser induced breakdown spectroscopy (LIBS) and micromachining of metallic samples. Shorter pulses gave a lower threshold. Different phase functions were tested, and sample-dependent differences were found. Phase dependence was greater near threshold. When 30Â fs pulses were stretched to 10Â ps by linear chirp, little or no effect was measured on the LIBS signal, seemingly contradicting the advantages reported for femtosecond pulses. We determine that the bandwidth of the laser pulses is inversely proportional to the LIBS threshold.
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Authors
Tissa Gunaratne, Michael Kangas, Sherdeep Singh, Andrew Gross, Marcos Dantus,