Long Period Grating-Based Fiber Coupling to WGM Microresonators
A comprehensive model for designing robust all-in-fiber microresonator-based optical sensing setups is illustrated. The investigated all-in-fiber setups allow light to selectively excite high-Q whispering gallery modes (WGMs) into optical microresonators, thanks to a pair of identical long period gr...
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MDPI AG
2018-07-01
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| Series: | Micromachines |
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| Online Access: | http://www.mdpi.com/2072-666X/9/7/366 |
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doaj-974c33af012e4284b52f4294feab9db52020-11-24T22:06:50ZengMDPI AGMicromachines2072-666X2018-07-019736610.3390/mi9070366mi9070366Long Period Grating-Based Fiber Coupling to WGM MicroresonatorsFrancesco Chiavaioli0Dario Laneve1Daniele Farnesi2Mario Christian Falconi3Gualtiero Nunzi Conti4Francesco Baldini5Francesco Prudenzano6Institute of Applied Physics “Nello Carrara” (IFAC), National Research Council of Italy (CNR), Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, ItalyDepartment of Electrical and Information Engineering, Polytechnic University of Bari, 70125 Bari, ItalyInstitute of Applied Physics “Nello Carrara” (IFAC), National Research Council of Italy (CNR), Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, ItalyDepartment of Electrical and Information Engineering, Polytechnic University of Bari, 70125 Bari, ItalyInstitute of Applied Physics “Nello Carrara” (IFAC), National Research Council of Italy (CNR), Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, ItalyInstitute of Applied Physics “Nello Carrara” (IFAC), National Research Council of Italy (CNR), Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, ItalyDepartment of Electrical and Information Engineering, Polytechnic University of Bari, 70125 Bari, ItalyA comprehensive model for designing robust all-in-fiber microresonator-based optical sensing setups is illustrated. The investigated all-in-fiber setups allow light to selectively excite high-Q whispering gallery modes (WGMs) into optical microresonators, thanks to a pair of identical long period gratings (LPGs) written in the same optical fiber. Microspheres and microbubbles are used as microresonators and evanescently side-coupled to a thick fiber taper, with a waist diameter of about 18 µm, in between the two LPGs. The model is validated by comparing the simulated results with the experimental data. A good agreement between the simulated and experimental results is obtained. The model is general and by exploiting the refractive index and/or absorption characteristics at suitable wavelengths, the sensing of several substances or pollutants can be predicted.http://www.mdpi.com/2072-666X/9/7/366microresonatorwhispering gallery modelong period gratingfiber couplingdistributed sensingchemical/biological sensing |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Francesco Chiavaioli Dario Laneve Daniele Farnesi Mario Christian Falconi Gualtiero Nunzi Conti Francesco Baldini Francesco Prudenzano |
| spellingShingle |
Francesco Chiavaioli Dario Laneve Daniele Farnesi Mario Christian Falconi Gualtiero Nunzi Conti Francesco Baldini Francesco Prudenzano Long Period Grating-Based Fiber Coupling to WGM Microresonators Micromachines microresonator whispering gallery mode long period grating fiber coupling distributed sensing chemical/biological sensing |
| author_facet |
Francesco Chiavaioli Dario Laneve Daniele Farnesi Mario Christian Falconi Gualtiero Nunzi Conti Francesco Baldini Francesco Prudenzano |
| author_sort |
Francesco Chiavaioli |
| title |
Long Period Grating-Based Fiber Coupling to WGM Microresonators |
| title_short |
Long Period Grating-Based Fiber Coupling to WGM Microresonators |
| title_full |
Long Period Grating-Based Fiber Coupling to WGM Microresonators |
| title_fullStr |
Long Period Grating-Based Fiber Coupling to WGM Microresonators |
| title_full_unstemmed |
Long Period Grating-Based Fiber Coupling to WGM Microresonators |
| title_sort |
long period grating-based fiber coupling to wgm microresonators |
| publisher |
MDPI AG |
| series |
Micromachines |
| issn |
2072-666X |
| publishDate |
2018-07-01 |
| description |
A comprehensive model for designing robust all-in-fiber microresonator-based optical sensing setups is illustrated. The investigated all-in-fiber setups allow light to selectively excite high-Q whispering gallery modes (WGMs) into optical microresonators, thanks to a pair of identical long period gratings (LPGs) written in the same optical fiber. Microspheres and microbubbles are used as microresonators and evanescently side-coupled to a thick fiber taper, with a waist diameter of about 18 µm, in between the two LPGs. The model is validated by comparing the simulated results with the experimental data. A good agreement between the simulated and experimental results is obtained. The model is general and by exploiting the refractive index and/or absorption characteristics at suitable wavelengths, the sensing of several substances or pollutants can be predicted. |
| topic |
microresonator whispering gallery mode long period grating fiber coupling distributed sensing chemical/biological sensing |
| url |
http://www.mdpi.com/2072-666X/9/7/366 |
| work_keys_str_mv |
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