| Full text | |
| Author(s): |
Raele, Marcus Paulo
[1]
;
De Pretto, Lucas Ramos
[1]
;
de Rossi, Wagner
[1]
;
Vieira, Jr., Nilson Dias
[1]
;
Samad, Ricardo Elgul
[1]
Total Authors: 5
|
| Affiliation: | [1] IPEN CNEN SP, Nucl & Energy Res Inst, Ave Prof Lineu Prestes, 2242, Cidade Univ, BR-05508000 Sao Paulo, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | SCIENTIFIC REPORTS; v. 9, MAR 12 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
We designed a real time, single-laser focus tracking system using low coherence properties of the machining femtosecond laser itself in order to monitor and correct the sample position relative to the focal plane. Using a Michelson Interferometer, the system collects data arising from part of the beam backscattered at the ablation spot. The data is analyzed by a custom software for position correction (employing an XYZ automated translation stage). With the focus tracking enabled we were able to etch channels with a stable cross-section profile on a bovine tooth with relief amplitude tens of times greater than the Rayleigh length of the system, keeping the sample inside the confocal parameter during most of the processing time. Moreover, the system is also capable of monitoring crater depth evolution during the ablation process, allowing for material removal assessment. (AU) | |
| FAPESP's process: | 15/24878-0 - DEVELOPMENT OF A DYNAMIC INTERFEROMETRIC FOCUSING SYSTEM FOR FEMTOSECOND LASER MACHINING |
| Grantee: | Marcus Paulo Raele |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 15/15775-3 - Optical Coherence Tomography signal autocorrelation analysis algorithm applied to blood flow monitoring in mice with Metabolic Syndrome |
| Grantee: | Lucas Ramos de Pretto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |