A Simple Optical Sensor Based on an In-Line Mach–Zehnder Interferometer for Monitoring Single- and Two-Phase Flows in Pipelines

Autor: João C. W. A. Costa, Maria Thereza M. Rocco Giraldi, Marcelo de Oliveira e Silva, Victor H. R. Cardoso, Cindy Stella Fernandes

Publikováno v: IEEE Transactions on Instrumentation and Measurement. 70:1-6

In this article, we proposed a simple optical sensor for flow measurement. The sensor structure is based on an in-line Mach–Zehnder interferometer formed by splicing an input single-mode fiber section and an output single-mode fiber section to a si

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::569955a7552660a06f6795f847c237a9
https://doi.org/10.1109/tim.2021.3082268

Comparative performance analysis of relative humidity sensor based on intermodal interference using tapered square no-core optical fiber and tapered cylindrical optical fiber

Autor: Maria Thereza M. Rocco Giraldi, Wilson Francelino de Morais

Publikováno v: Optical and Quantum Electronics. 51

This work presents the computational evaluation of a new model for relative humidity sensor based on the principle of intermodal interference using a square-section no-core tapered optical fiber compared to a classical cylindrical tapered optical fib

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fc44d1078dd45888797b69e770a7a5f4
https://doi.org/10.1007/s11082-019-2006-6

A simple tunable TE-pass CMOS compatible polarizer

Autor: Renan Silva Santos, M. A. G. Martinez, Maria Thereza M. Rocco Giraldi

Publikováno v: Latin America Optics and Photonics Conference.

In this work, we analyze a CMOS-compatible TE-pass tunable polarizer based on graphene`s selective loss. Simulations show that the slab waveguide structure proposed attains a 6 dB/cm difference in losses between TM0 and TE0 modes, over a 600 nm band.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1587264d3f1730714ad7ffa79b3613b2
https://doi.org/10.1364/laop.2018.th3a.5

A simple strategy to design broadband low power consumption distributed Raman amplifier

Autor: M. A. G. Martinez, Maria Thereza M. Rocco Giraldi, Renan Silva Santos

Publikováno v: Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Volume: 16, Issue: 3, Pages: 827-840, Published: SEP 2017
Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.16 n.3 2017
Journal of Microwaves. Optoelectronics and Electromagnetic Applications
Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)
instacron:SBMO
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 16, Iss 3, Pp 827-840

In this work, a simple strategy to design wideband low power consumption Raman amplifiers is demonstrated for a three-pump configuration using a low water peak optical fiber. The approach is based on the introduction of a novel numerical measure, whi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89c605e9fca678aa04adb9325f06696e
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000300827&lng=en&tlng=en

Interrogation and multiplexing system for fiber loop mirror coupled intensity sensors using OTDR

Autor: Marta Ferreira, Cindy S. Fernandes, Marco Jose de Sousa, Maria Thereza M. Rocco Giraldi, Pedro A. S. Jorge, João C. W. A. Costa, Orlando Frazão, Jose Luis Santos

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

In this article, it is proposed an interrogation and multiplexing system based on optical time domain reflectometer for fiber loop mirror coupled intensity sensors. Pulse width of approximately 100 ns enabled to attain a dynamic range of approximatel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae7e81cb1bb90e92031e638ba3370878
https://doi.org/10.1002/mop.28720