| Texto completo | |
| Autor(es): |
Melo, Arline M.
;
Toledo, Mauricio A. P.
;
Maia, Francisco C. B.
;
Rocha, Andre
;
Plotegher, Matheus B.
;
Pereira, Daniel
;
Cruz, Flavio C.
;
Sadwick, LP
;
OSullivan, CM
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | TERAHERTZ, RF, MILLIMETER, AND SUBMILLIMETER-WAVE TECHNOLOGY AND APPLICATIONS VI; v. 8624, p. 6-pg., 2013-01-01. |
| Resumo | |
We report the development and initial results of two Terahertz imaging systems based on monochromatic sources at 0.2 and 2.52 THz. The first is based on a microwave oscillator, whose frequency is multiplied to 0.2 THz, used in conjunction with a zero-bias detector. The sample is scanned across the beam, and transmission images are obtained after processing. The second system allows real-time images, and consists of a methanol gas laser emitting at 119 microns (2.52 THz) and a commercial camera based on a microbolometer array. We describe the construction and performance of the methanol laser and a tunable CO2 laser, which emits 20 W at the 9P(36) pump line. Due to the high coherence of the laser, this system is particularly suited for diffraction and interference imaging. We have measured the absorption coefficients of a few samples assuming the Beer law. (AU) | |
| Processo FAPESP: | 10/50253-4 - Desenvolvimento de sistemas de imagens na faixa de Terahertz |
| Beneficiário: | Arline Maria Melo |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE |
| Processo FAPESP: | 06/53713-0 - Desenvolvimento de lasers de potência e espectroscopia de precisão em átomos ultrafrios e aprisionados |
| Beneficiário: | Daniel Pereira |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 05/51689-2 - Centro de Pesquisa em Óptica e Fotônica - UNICAMP (CEPOF-UNICAMP) |
| Beneficiário: | Hugo Luis Fragnito |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |