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Two-Parameter Elliptical Fitting Method for Short-Cavity Fiber Fabry–Perot Sensor Interrogation

Xiongxing Zhang, Wei Wang, Haibin Chen, Ying Tang, Zhibo Ma, Kening Wang
2018 Sensors  
To solve the cavity interrogation problem of short cavity fiber FabryPerot sensors in white light spectral interrogation with amplified spontaneous emissions (ASEs) as the white light sources, a data  ...  processing method, using an improved elliptical fitting equation with only two undetermined coefficients, is proposed.  ...  Figure 1 . 1 Typical structure of an extrinsic fiber Fabry-Perot (FP) sensor fabricated with two optical fibers and a short fiber tube. SM is single mode.  ... 
doi:10.3390/s19010036 fatcat:aj2a2ivspvetnamja7ydu6wz7q

"Fiber-Optic Cavities for Physical and Chemical Sensing"

Saverio Avino
2013 The Open Optics Journal  
The intrinsic properties of high-finesse fiber cavities, either based on Bragg-grating structures or closed fiber rings, are discussed for quasi-static and dynamic strain sensing.  ...  Laser illumination and high precision laser frequency-locking techniques are considered for low-noise, fast and wide dynamic range active interrogation.  ...  An in-fiber Fabry-Perot (FFP) cavity made from two identical FBGs can be used for vibration and strain measurements, since the resonances in the cavity spectrum depend on the cavity length and thereby,  ... 
doi:10.2174/1874328501307010128 fatcat:r2g4zg7lzfgd3o4ezhjsmzte3m

Thin-Fiber-Based Fabry–Pérot Cavity for Monitoring Microfluidic Refractive Index

Xiaoling Ni, Songnian Fu, Zhiyong Zhao
2016 IEEE Photonics Journal  
We report an all-fiber miniature exposed Fabry-Pérot (F-P) cavity microfluidic refractometer by splicing an ultrashort segment of thin fiber with standard single-mode fiber with large off-center alignment  ...  Theoretical investigations of dynamic range and sensitivity issues for the proposed fiber sensors are carried out.  ...  Our obtained result is similar to previous ordinary Fabry-Pérot interferometer based fiber sensors.  ... 
doi:10.1109/jphot.2016.2566448 fatcat:alrchmahcfei7iwvzrstirgepy

In-Fiber Interferometric-Based Sensors: Overview and Recent Advances

Amalia Miliou
2021 Photonics  
In-fiber interferometric-based sensors are a rapidly growing field, as these sensors exhibit many desirable characteristics compared to their regular fiber-optic counterparts and are being implemented  ...  one for the application at hand.  ...  Fabry-Perot-Based Sensors In-fiber Fabry-Perot interferometry (FOFPI) is an accurate and well-established sensing technology that is used to monitor a wide range of physical and chemical parameters, such  ... 
doi:10.3390/photonics8070265 fatcat:5ivmrsvxcfhcfnxmu6xr64oqxq

Hybrid Fiber Optic Sensor Systems in Structural Health Monitoring in Aircraft Structures

Karolina Bednarska, Piotr Sobotka, Tomasz Ryszard Woliński, Oliwia Zakręcka, Wiktor Pomianek, Agnieszka Nocoń, Piotr Lesiak
2020 Materials  
This paper presents an overview of hybrid fiber-optic sensing systems based on scattering techniques, fiber Bragg gratings, interferometric techniques, and polarimetric methods in structural health monitoring  ...  Since it is difficult to indicate the most comprehensive approach due to different parameters of the described sensors, the review contains a detailed description of available solutions.  ...  Acknowledgments: An unlimited access to research labs of the Centre for Advanced Materials and Technologies CEZAMAT of the Warsaw University of Technology during the preparation of the manuscript is gratefully  ... 
doi:10.3390/ma13102249 pmid:32414212 fatcat:e2d3jlhyk5cgnb27gmb72tpfr4

Shallow-Tapered Chirped Fiber Bragg Grating Sensors for Dual Refractive Index and Temperature Sensing

Takhmina Ayupova, Madina Shaimerdenova, Daniele Tosi
2021 Sensors  
In this work, we present a gold-coated shallow-tapered chirped fiber Bragg grating (stCFBG) for dual refractive index (RI) and temperature sensing.  ...  The stCFBG is a compact probe, suitable for long-term and temperature-compensated biosensing and detection of chemical analytes.  ...  Wang et al. reported a dual-cavity interferometric method Reference Sensing Method RI Sensitivity Temperature Sensitivity Cross-Sensitivities Wang et al. [31] Dual-cavity Fabry-Perot interferometer  ... 
doi:10.3390/s21113635 pmid:34073669 fatcat:dbhjroohqfez7dlmhkc6y4zwnq

Sensitivity-controllable refractive index sensor based on reflective θ-shaped microfiber resonator cooperated with Vernier effect

Zhilin Xu, Yiyang Luo, Deming Liu, Perry Ping Shum, Qizhen Sun
2017 Scientific Reports  
By cascading it with a fiber Fabry-Perot interferometer, Vernier effect is generated to demodulate surrounding RI with enhanced sensitivity.  ...  The θ-shaped microfiber resonator based all-fiber RI sensor featuring controllable sensitivity and compact size can be widely used for chemical and biological detections.  ...  FFPI: fiber Fabry-Perot interferometer. ScIENTIfIc RepoRtS | 7: 9620 | DOI:10.1038/s41598-017-10163-x Figure 3 . 3 Principle of Vernier effect.  ... 
doi:10.1038/s41598-017-10163-x pmid:28852073 pmcid:PMC5574978 fatcat:ankw3u4a3jhnzn46m5v2bn4fdq

Analysis of the Directivity of Glass Etalon Fabry-Pérot Ultrasound Sensors

Danny R. Ramasawmy, Eleanor Martin, James A. Guggenheim, Edward Z. Zhang, Paul C. Beard, Bradley E. Treeby, Ben T. Cox
2019 IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control  
Planar glass-etalon Fabry-Pérot (FP) optical ultrasound sensors offer an alternative to piezoelectric sensors for the measurements of high-intensity focused ultrasound (HIFU) fields and other metrological  ...  For the all-hard-dielectric sensor, two features correspond to the water-substrate and water-spacer compressional and shear critical angles.  ...  For a planar Fabry-Pérot sensor interrogated by sufficiently small interrogation spot size, the complex wavefield within the sensor will dominate the directional response.  ... 
doi:10.1109/tuffc.2019.2921735 pmid:31180849 fatcat:bjfs46slm5bgvatyp74e4hxeam

Surface-relief fiber Bragg gratings for sensing applications

Kevin H. Smith, Benjamin L. Ipson, Tyson L. Lowder, Aaron R. Hawkins, Richard H. Selfridge, Stephen M. Schultz
2006 Applied Optics  
and department style requirements; (2) its illustrative materials including figures, tables, and charts are in place; and (3) the final manuscript is satisfactory to the graduate committee and is ready for  ...  Fabry-Pérot cavities use two discrete mirrors to form the cavity creating a distance, L, that is well defined.  ...  For a traditional Fabry-Pérot cavity the free spectral range (FSR), or the distance between transmission peaks, is given as Fabry-Pérot Fiber Bragg Gratings F SR = λ 2 2n ef f L . (9.2) However, traditional  ... 
doi:10.1364/ao.45.001669 pmid:16572680 fatcat:vbcyfan25nfnpjegdawl2cdary

Comparing a mercury optical lattice clock with microwave and optical frequency standards

R Tyumenev, M Favier, S Bilicki, E Bookjans, R Le Targat, J Lodewyck, D Nicolodi, Y Le Coq, M Abgrall, J Guéna, L De Sarlo, S Bize
2016 New Journal of Physics  
Frequency ratio measurements of the kind of those reported in this paper have a strong impact for frequency metrology but also for fundamental physics as they can be used to monitor putative variations  ...  Furthermore, by comparing the mercury optical lattice clock to a Rb atomic fountain, we determine for the first time to our knowledge the ratio between the ^199Hg clock transition and the ^87Rb ground  ...  The AOM is also used to stabilize the optical path between the Fabry-Perot cavity and the first enhancement cavity.  ... 
doi:10.1088/1367-2630/18/11/113002 fatcat:nbl2qn7zmnbhpbot5lkllpoyky

Fiber-Optic Microstructure Sensors: A Review

Zengling Ran, Xiu He, Yunjiang Rao, Dong Sun, Xiaojuan Qin, Debiao Zeng, Wangwei Chu, Xiankun Li, Yabin Wei
2021 Photonic Sensors  
This paper reviews a wide variety of fiber-optic microstructure (FOM) sensors, such as fiber Bragg grating (FBG) sensors, long-period fiber grating (LPFG) sensors, Fabry-Perot interferometer (FPI) sensors  ...  , and main sensing parameters, are summarized.  ...  FPI sensors can be generally classified into categories: the intrinsic and extrinsic Fabry-Perot interferometer sensors (IFPI and EFPI) according to the behaviors of the light in the cavity.  ... 
doi:10.1007/s13320-021-0632-7 doaj:05695414ea084823a5079749ead73c3a fatcat:bacdnpa6pbh4letyjc7qv6natm

Backward-mode multiwavelength photoacoustic scanner using a planar Fabry-Perot polymer film ultrasound sensor for high-resolution three-dimensional imaging of biological tissues

Edward Zhang, Jan Laufer, Paul Beard
2008 Applied Optics  
mapping system based upon a Fabry-Perot polymer film sensor for detecting them.  ...  Two sensors were used, one with a 22 m thick polymer film spacer and the other with a 38 m thick spacer providing Ϫ3 dB acoustic bandwidths of 39 and 22 MHz, respectively.  ...  Subsections 2.B and 2.C describe the Fabry-Perot (FP) sensor head and the sensor readout scheme, respectively.  ... 
doi:10.1364/ao.47.000561 pmid:18239717 fatcat:dfx4gqazofgtteurc6v374vr7u

Characterization of integrated waveguides by atomic-force-microscopy-assisted mid-infrared imaging and spectroscopy

Michele Ortolani, Kevin Gallacher, Ross Millar, Douglas Paul, Jacopo Frigerio, Andrea Ballabio, Giovanni Isella, francesco rusconi, Paolo Biagioni, Valeria Giliberti, leonetta Baldassarre, alessia sorgi
2020 Optics Express  
Acknowledgements The authors thank Daniele Brida and Marco Fischer for fruitful discussions and the technical staff of the James Watt Nanofabrication Centre for help in fabrication of the devices for the  ...  (d) The fitting curves based on Eq. Fig. 5 . 5 (a) AFM-IR spectra showing Fabry-Perot cavity fringes for Ge-on-Si waveguide lengths of 250, 350, and 400 µm.  ...  An alternative method to Fabry-Perot fringe contrast evaluation is the quasi cut-back method, in which waveguides of different length are realized on the same chip and the output power is measured by displacing  ... 
doi:10.1364/oe.393748 pmid:32752485 fatcat:ceyjuwvoffagrbrqjquvbjze2q

Micro-Optical Techniques [chapter]

Kartik Srinivasan, Matthew Rakher, Marcelo Davanço
2011 Optical Techniques for Solid-State Materials Characterization  
We also thank Antonio Badolato, our collaborator on near-infrared quantum dot studies, and Andrew Berglund for helpful comments on the chapter.  ...  Portions of the work described were performed at the NIST Center for Nanoscale Science and Technology, and partly supported by the NIST-CNST/UMD-NanoCenter Cooperative Agreement.  ...  Lasers based on Fabry-Perot cavities may naturally produce a Gaussian-shaped beam, while edge-emitting semiconductor lasers can produce an elliptical, diverging beam.  ... 
doi:10.1201/b11040-21 fatcat:aarhtndd2ndq5ib6bqqgqmyrru

Generator Insulation-Aging On-Line Monitoring Technique Based on Fiber Optic Detecting Technology [chapter]

Peter Kung
2018 Simulation and Modelling of Electrical Insulation Weaknesses in Electrical Equipment  
The proposed FOS is a Fabry-Perot cavity made up of two identical fiber Bragg gratings (FBGs) using light wave interference as the working principle.  ...  The relationship between insulation aging and generator lifespan using fiber optic sensors (FOSs) is explored to ultimately improve asset lifespan through smart choices in running conditions and maintenance  ...  Acknowledgements The authors would like to express gratitude to Calpine Corporation for allowing and facilitating the installation of the fiber optic sensing systems at the Hermiston Power Project plant  ... 
doi:10.5772/intechopen.78065 fatcat:txqcuwy2xjcxxftcnfsmrtu77q
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