Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Allan Bereczki"'
Publikováno v:
Polymers, Vol 15, Iss 24, p 4644 (2023)
Microplastic pollution is a growing public concern as these particles are ubiquitous in various environments and can fragment into smaller nanoplastics. Another environmental concern arises from widely used engineered nanoparticles. Despite the incre
Externí odkaz:
https://doaj.org/article/d59fa485e24f48f9bc19e75e68912329
Autor:
Allan Bereczki
Publikováno v:
Biblioteca Digital de Teses e Dissertações da USPUniversidade de São PauloUSP.
A operação dinamicamente estável com zonas conjuntas foi obtida para um ressonador laser contendo dois bastões de Nd:YAG com módulos laser comerciais. O ressonador não polarizado gerou 115 W de potência no modo transversal fundamental TEM00. Q
Autor:
Allan Bereczki, Niklaus U. Wetter
Publikováno v:
Laser Resonators, Microresonators, and Beam Control XXIV.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36cb8cef21f40c47bd7e65d92da71812
https://doi.org/10.1117/12.2610220
https://doi.org/10.1117/12.2610220
Autor:
Allan Bereczki, Niklaus Wetter
Publikováno v:
Latin America Optics and Photonics (LAOP) Conference 2022.
We recently reported a single-frequency Nd:YAG ring laser with 55.6 W CW output. In this work our design equations are given in order to obtain compactness and increasing resonator free spectral range.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f34fd7ce41d2a8f25f5b0e4b76b67665
https://doi.org/10.1364/laop.2022.th1b.4
https://doi.org/10.1364/laop.2022.th1b.4
Autor:
Jessica Dipold, Allan Bereczki, Gustavo Pinheiro, Kamilla Vasconcelos, Anderson Zanardi de Freitas, Niklaus U. Wetter
Publikováno v:
Latin America Optics and Photonics (LAOP) Conference 2022.
Understanding radiation damage to plastic is of great interest for possible construction applications. Two different plastics were gamma irradiated and their property changes were studied with micro-Raman spectroscopy, showing promising results in in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::776a4429ab1ae8ba35efcac8a64dc8ee
https://doi.org/10.1364/laop.2022.tu4a.10
https://doi.org/10.1364/laop.2022.tu4a.10
Autor:
Allan Bereczki, Niklaus Ursus Wetter
Publikováno v:
Applied Optics. 62:C38
When considering dynamically stable resonators, ring lasers are good choices because they have a stability interval that is twice as large as that of linear resonators and sensitivity to misalignment decreasing with pump power; however, the literatur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::805b0c7add75e0c273d8cc6c609d222e
https://doi.org/10.1364/ao.477415
https://doi.org/10.1364/ao.477415
Publikováno v:
Optics express. 29(15)
A Nd:YAG rod single-frequency ring laser based on side-pumped commercial modules is presented. Thermally induced birefringence compensation was applied in a dynamically stable resonator providing 55.6 W of continuous, linearly polarized, TEM00 output
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4185659de4891d747713a8be2d12e86
https://pubmed.ncbi.nlm.nih.gov/34614586
https://pubmed.ncbi.nlm.nih.gov/34614586
Autor:
Allan Bereczki
Publikováno v:
Biblioteca Digital de Teses e Dissertações da USP
Universidade de São Paulo (USP)
instacron:USP
Repositório Institucional do IPEN
Instituto de Pesquisas Energéticas e Nucleares (IPEN)
instacron:IPEN
Universidade de São Paulo (USP)
instacron:USP
Repositório Institucional do IPEN
Instituto de Pesquisas Energéticas e Nucleares (IPEN)
instacron:IPEN
Neste trabalho, que teve como objetivo o estudo do uso de meio ativo com birrefringência termicamente induzida (BIT) de Nd:YAG em ressonadores dinamicamente estáveis, foi proposto o desenvolvimento de um ressonador dinamicamente estável em anel de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94f120babeecee22ddcd50dc15cd749c
Publikováno v:
Laser Resonators, Microresonators, and Beam Control XXII.
Low heat generation can be obtained when pumping Nd:YLF at wavelengths of 872 nm and 880 nm and emitting at the three-level transition of 908 nm. These transitions show very low quantum defect with efficiencies of 0.96 and 0.97, respectively. However
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3c0f28e1492bfababa634e851bf88a9
https://doi.org/10.1117/12.2544844
https://doi.org/10.1117/12.2544844
Autor:
Allan Bereczki, Niklaus Ursus Wetter
Publikováno v:
Laser Resonators, Microresonators, and Beam Control XXII.
Diode-side pump Nd:YAG rod modules are widely available, reliable and commercially very attractive for building continuous-wave solid-state lasers in the 10-1000 W range. Newer technologies such as fiber or thin disk lasers are generally much more ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fd51dd929f5065e6fd29372bbb83d87
https://doi.org/10.1117/12.2545005
https://doi.org/10.1117/12.2545005