| Full text | |
| Author(s): |
Gouveia, Marcelo A.
;
Pellegrini, Paloma E. S.
;
dos Santos, Juliana S.
;
Raimundo, Ivo M., Jr.
;
Cordeiro, Cristiano M. B.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | APPLIED OPTICS; v. 53, n. 31, p. 8-pg., 2014-11-01. |
| Abstract | |
An embedded silica optical microfiber knot resonator humidity sensor is presented. As silica has a poor response to environmental humidity changes, a surrounding layer of Nafion is used as a transducer. Spectral characterization and also a procedure to determine the coupling and total loss coefficients are presented. Sensitivity as high as (0.29 +/- 0.01) nm/% relative humidity has been noticed. Possible issues that emerge from the use of Nafion such as bulk swelling, refractive index hysteresis, as well as a saturation process, are discussed. (C) 2014 Optical Society of America (AU) | |
| FAPESP's process: | 08/57808-1 - National Institute of Advanced Analytical Science and Technology |
| Grantee: | Celio Pasquini |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/00322-2 - Development of an optical sensor for determination of moisture in air and natural gas |
| Grantee: | Juliana Santiago dos Santos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |