Limits...
LOLS research in technology for the development and application of new fiber-based sensors.

Coelho J, Nespereira M, Silva C, Rebordão J - Sensors (Basel) (2012)

Bottom Line: This paper presents the research made at the Laboratory of Optics, Lasers and Systems (LOLS) of the Faculty of Sciences of University of Lisbon, Portugal, in the field of fiber-based sensors.Three areas are considered: sensor encapsulation for natural aqueous environments, refractive index modulation and laser micropatterning.We present the main conclusions on the issues and parameters to take in consideration for the encapsulation process and results of its design and application.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Faculty of Sciences, University of Lisbon, Lisboa, Portugal. joao.coelho@fc.ul.pt

ABSTRACT
This paper presents the research made at the Laboratory of Optics, Lasers and Systems (LOLS) of the Faculty of Sciences of University of Lisbon, Portugal, in the field of fiber-based sensors. Three areas are considered: sensor encapsulation for natural aqueous environments, refractive index modulation and laser micropatterning. We present the main conclusions on the issues and parameters to take in consideration for the encapsulation process and results of its design and application. Mid-infrared laser radiation was applied to produce long period fiber gratings and nanosecond pulses of near-infrared Q-switch laser were used for micropatterning.

No MeSH data available.


Transmittance spectrum of the broad band source used in the tests and an example of a signal obtained by refractive index modulating the fiber (grating manufactured under the conditions of Figure 6, with a period of about 500 μm and 50 periods).
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3376623&req=5

f8-sensors-12-02654: Transmittance spectrum of the broad band source used in the tests and an example of a signal obtained by refractive index modulating the fiber (grating manufactured under the conditions of Figure 6, with a period of about 500 μm and 50 periods).

Mentions: An example of a signal obtained by symmetrically changing the cladding diameter can be seen in Figure 8. The LPFG was created with a period of about 500 μm; 50 periods were written. These preliminary results are consistent with what should be expected (period and size of the LPFG) although the coupling between the light source and the fiber should be improved in order to reduce the attenuation of the signal and reduce the background loss.


LOLS research in technology for the development and application of new fiber-based sensors.

Coelho J, Nespereira M, Silva C, Rebordão J - Sensors (Basel) (2012)

Transmittance spectrum of the broad band source used in the tests and an example of a signal obtained by refractive index modulating the fiber (grating manufactured under the conditions of Figure 6, with a period of about 500 μm and 50 periods).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376623&req=5

f8-sensors-12-02654: Transmittance spectrum of the broad band source used in the tests and an example of a signal obtained by refractive index modulating the fiber (grating manufactured under the conditions of Figure 6, with a period of about 500 μm and 50 periods).
Mentions: An example of a signal obtained by symmetrically changing the cladding diameter can be seen in Figure 8. The LPFG was created with a period of about 500 μm; 50 periods were written. These preliminary results are consistent with what should be expected (period and size of the LPFG) although the coupling between the light source and the fiber should be improved in order to reduce the attenuation of the signal and reduce the background loss.

Bottom Line: This paper presents the research made at the Laboratory of Optics, Lasers and Systems (LOLS) of the Faculty of Sciences of University of Lisbon, Portugal, in the field of fiber-based sensors.Three areas are considered: sensor encapsulation for natural aqueous environments, refractive index modulation and laser micropatterning.We present the main conclusions on the issues and parameters to take in consideration for the encapsulation process and results of its design and application.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Faculty of Sciences, University of Lisbon, Lisboa, Portugal. joao.coelho@fc.ul.pt

ABSTRACT
This paper presents the research made at the Laboratory of Optics, Lasers and Systems (LOLS) of the Faculty of Sciences of University of Lisbon, Portugal, in the field of fiber-based sensors. Three areas are considered: sensor encapsulation for natural aqueous environments, refractive index modulation and laser micropatterning. We present the main conclusions on the issues and parameters to take in consideration for the encapsulation process and results of its design and application. Mid-infrared laser radiation was applied to produce long period fiber gratings and nanosecond pulses of near-infrared Q-switch laser were used for micropatterning.

No MeSH data available.