Ablation study with a Nd:YAG laser in enhanced free-running regime

Constantin G. Fenic; Aurel Stratan; Ion N. Mihailescu; Razvan V. Dabu; Alexandru Popa; Ileana Apostol; Carmen Ristoscu; G. L. Muscalu; Vassilis Zafiropulos

doi:10.1117/12.432846

29 June 2001 Ablation study with a Nd:YAG laser in enhanced free-running regime

Constantin G. Fenic, Aurel Stratan, Ion N. Mihailescu, Razvan V. Dabu, Alexandru Popa, Ileana Apostol, Carmen Ristoscu, G. L. Muscalu, Vassilis Zafiropulos

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Proceedings Volume 4430, ROMOPTO 2000: Sixth Conference on Optics; (2001) https://doi.org/10.1117/12.432846
Event: ROMOPTO 2000: Sixth Conference on Optics, 2000, Bucharest, Romania

Abstract

The research is carried on as a project in the frame of the PHARE-TTQM program, a cooperation of INFLPR Bucharest, PRO OPTICA SA Bucharest and FORTH-IESL Heraklion-Greece. A new laser ablation technique, based on the enhanced free running (EFR) mode of operation of a Nd:YAG laser, is presented. In the EFR degree(s) mode it is possible to achieve a regular temporal structure of the laser spiking combined with the control of both amplitude and separation of the individual spikes. The stable fluence and power density of the spikes will increase the precision of the EFR laser ablation in comparison with the short free running technique. The short duration of the EFR spikes, combined with their large time separation, reduces the level of the thermal damage of the substrate. A surface processing laser device operating in EFR mode is under development with PHARE financial support in the Laser Department of INFLPR. Preliminary study of ablation of stone samples from Stavropoleos Monastery, Bucharest, using FORTH-IESL laser facilities, is presented.

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Constantin G. Fenic, Aurel Stratan, Ion N. Mihailescu, Razvan V. Dabu, Alexandru Popa, Ileana Apostol, Carmen Ristoscu, G. L. Muscalu, and Vassilis Zafiropulos "Ablation study with a Nd:YAG laser in enhanced free-running regime", Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); https://doi.org/10.1117/12.432846

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