scholarly journals Gasoline Quality Sensor Based on Tilted Fiber Bragg Gratings

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 51 ◽  
Author(s):  
Stenio Aristilde ◽  
Cristiano M. B. Cordeiro ◽  
Jonas H. Osório
Keyword(s):  
Optical Fiber Sensor ◽  
Bragg Gratings ◽  
Bragg Grating ◽  
Fuel Quality ◽  
Resolution Limit ◽  
Practical Applications ◽  
Sensor Performance ◽  
All Optical ◽  
Index Changes ◽  
Spectral Responses

We report on the study of an intensity-based optical fiber sensor for gasoline quality monitoring. The sensor setup employs two Bragg gratings with different spectral responses to interrogate the optical response of a tilted Bragg grating. The sensor operation is based on the tilted Bragg grating sensitivity to external refractive index changes, which are translated as power variations by the interrogation scheme. Gasoline–ethanol solutions with concentrations ranging from 0% to 60% ethanol were used to demonstrate the sensor performance. The results allowed to estimate that the sensor is able, within its resolution limit, to detect ethanol concentration variations of 1.5% in gasoline–ethanol solutions and discriminate temperature variations of 0.5 °C. The all-optical sensor setup is compact and robust, making it a competitive alternative for the realization of fuel quality analyses in practical applications.

scholarly journals Trends in Bragg Grating Technology for Optical Fiber Sensor Applications

2010 ◽  
Vol 437 ◽  
pp. 304-308 ◽  
Author(s):  
Hartmut Bartelt
Keyword(s):  
Bragg Reflection ◽  
Optical Fiber Sensor ◽  
Small Diameter ◽  
Bragg Gratings ◽  
Visible Range ◽  
Bragg Grating ◽  
Fiber Types ◽  
Sensor Applications ◽  
Pure Silica ◽  
Crystal Fibers

Fiber Bragg gratings have found widespread and successful applications in optical sensor systems, e. g. for temperature, strain or refractive index measurements. Such sensor elements are fiber integrated, are applicable under harsh environmental conditions, and can be easily multiplexed. In order to further extend the field of applications, there is a great interest in specifically adapted Bragg gratings, in Bragg grating structures with increased stability, or in the use of special fiber types for grating inscription. The paper discusses such specific concepts for grating inscription, covers novel aspects of fiber gratings in small diameter fibers or in fiber tapers, of gratings in pure silica fibers without UV sensitivity, of grating inscription in different microstructured fibers or photonic crystal fibers, and investigates the concept of femtosecond inscription and the extension of the Bragg reflection wavelengths down to the visible range.

scholarly journals Design and Manufacturing Optoelectronic Sensors for the Measurement of Refractive Index Changes under Unknown Polarization State

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7318
Author(s):  
Damian Harasim ◽  
Piotr Kisała ◽  
Bakhyt Yeraliyeva ◽  
Janusz Mroczka
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Polarization State ◽  
Polarization Plane ◽  
Slight Modification ◽  
Bragg Grating ◽  
Practical Applications ◽  
Wide Range ◽  
Design And Manufacturing ◽  
Index Changes

This article proposes a new method for detecting slight refractive index changes under conditions of unknown polarization state. It is argued that an insignificant modification of the tilted fiber Bragg grating (TFBG) structure and selecting the appropriate spectral region allows us to accurately track changes in the refractive index. It has also been proven that the method can be easily made insensitive to temperature and that the sensitivity to changes in the polarization plane of the input light can be significantly reduced, which is crucial in later practical applications. Analytes in the form of an aqueous glucose solution were used to calibrate the sensor. The proposed method, based on perpendicular tilted fiber Bragg grating (P-TFBG), has a wide range of universality because its development and slight modification will enable the detection of glucose, pathogens, and viruses.

Multi-parameter Simultaneously Sensing Based on an Optimized Concatenated FBG with LPG

2015 ◽  
Vol 36 (2) ◽  
Author(s):  
Yong Chen ◽  
Bao-lin Liu ◽  
Huan-lin Liu ◽  
Kai Yang ◽  
Li-juan Chen
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Reflection Spectrum ◽  
Optical Fiber Sensor ◽  
Reference Value ◽  
Fiber Sensor ◽  
Bragg Grating ◽  
Long Period Grating ◽  
Long Period ◽  
Index Changes

AbstractWe analyze an optical fiber sensor based on a concatenated fiber Bragg grating (FBG) with long period grating (LPG) with transfer matrix method and experiment. First, we optimize parameters of concatenated structure in the method of simulation and discuss the influence that the lengths, periods and dc induced index changes of FBG and LPG and length of optical fiber between LPG and FBG has to influence reflection spectrum. Second, based on the optimized parameters for concatenated structure, fabricate such structure and use it to monitor concentration and temperature simultaneously. Simulation result proves that increasing the lengths of FBG and LPG properly, and length of optical fiber between LPG and FBG fixed in 20 mm, more clearly reflection spectrum can be obtained. Experiment result shows a novel optical fiber sensor based on a concatenated strong fiber Bragg grating with a weak long period grating (CLBG) device can be used to monitor concentration and temperature simultaneously. The result of research has reference value in multi-parameter simultaneously sensing.

All-optical generation of 40Gb/s single sideband signals using a fiber Bragg grating

2010 ◽  
Vol 283 (12) ◽  
pp. 2492-2495
Author(s):  
Miguel V. Drummond ◽  
Rogério N. Nogueira ◽  
Manuel Violas ◽  
Paulo P. Monteiro ◽  
Carola Sterner ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Single Sideband ◽  
Optical Generation ◽  
All Optical

Development of an Optical Fiber Sensor with a D-shaped Fiber Bragg Grating Integrated in a Loop-mirror Optical Fiber Laser as a High Sensitivity Refractometer

2021 ◽  
Vol 32 ◽  
Author(s):  
Binh Pham Thanh ◽  
Thuy Van Nguyen ◽  
Van Hoi Pham ◽  
Huy Bui ◽  
Thi Hong Cam Hoang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Limit Of Detection ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Optical Signal ◽  
Bragg Grating ◽  
Loop Mirror

In this paper, we report a new type of refractometer based on a D-shaped fiber Bragg grating (FBG) integrated in a loop-mirror optical fiber laser. This proposed sensor is used in wavelength interrogation method, in which the D-shaped FBG is applied as a refractive index (RI) sensing probe and a mirror to select mode of laser. The D-shaped FBG is prepared by the removal of a portion of the fiber cladding covering the FBG by means of side-polishing technique. The D-shaped FBG sensing probe integrated in a loop-mirror optical fiber laser with saturated pump technique, the characteristics of sensing signals have been improved to obtain stable intensity, narrower bandwidth and higher optical signal-to-noise ratio compare to normal reflection configuration. The limit of detection (LOD) of this sensor can be achieved to 2.95 x 10-4 RIU in the refractive index (RI) range of 1.42-1.44. Accordingly, we believe that the proposed refractometer has a huge potential for applications in biochemical-sensing technique.

Optical Fiber Sensor for DNA Detection Based on Doubled-Tilted Bragg Grating

2013 ◽  
pp. 349-352
Author(s):  
Alessandro Candiani ◽  
Michele Sozzi ◽  
Annamaria Cucinotta ◽  
Stefano Selleri ◽  
Rosanna Veneziano ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Dna Detection ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Bragg Grating
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