Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Hamed Nikbakht"'
Publikováno v:
APL Photonics, Vol 8, Iss 5, Pp 056107-056107-10 (2023)
Dielectric optical waveguides constitute the main building blocks of photonic integrated circuits (PICs). Channels with high refractive index contrast can provide very compact PIC components, whereas structures with lower index exhibit less propagati
Externí odkaz:
https://doaj.org/article/f044241315dd44969564da054958a848
Publikováno v:
Sensors, Vol 23, Iss 2, p 924 (2023)
We demonstrate a highly sensitive acoustic vibration sensor based on a tapered-tip optical fiber acting as a microcantilever. The tapered-tip fiber has a unique output profile that exhibits a circular fringe pattern, whose distribution is highly sens
Externí odkaz:
https://doaj.org/article/688706a2ec0745f6b623ef7803094a69
Autor:
Hamed Nikbakht, Mohammad Talebi Khoshmehr, Bob van Someren, Dieter Teichrib, Manfred Hammer, Jens Förstner, B. Imran Akca
Publikováno v:
Nikbakht, H, Khoshmehr, M T, van Someren, B, Teichrib, D, Hammer, M, Förstner, J & Akca, B I 2023, ' Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and a small footprint ', Optics Letters, vol. 48, no. 2, pp. 207-210 . https://doi.org/10.1364/OL.476537
Optics Letters, 48(2), 207-210. The Optical Society
Optics Letters, 48(2), 207-210. The Optical Society
Here we demonstrate a new, to the best of our knowledge, type of 3-dB coupler that has an ultra-broadband operational range from 1300 to 1600 nm with low fabrication sensitivity. The overall device size is 800 µm including in/out S-bend waveguides.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f29c5bb1672ebb6b9aaf7e5d57365b6c
https://hdl.handle.net/1871.1/0fc3adf2-5d21-43a1-b5c1-503ab1932db2
https://hdl.handle.net/1871.1/0fc3adf2-5d21-43a1-b5c1-503ab1932db2
Publikováno v:
Lu, C, Nikbakht, H, Karabiyik, M, Alaydrus, M & Akca, B I 2021, ' A compound optical microresonator design for self-referencing and multiplexed refractive index sensing ', Optics Express, vol. 29, no. 25, pp. 42215-42224 . https://doi.org/10.1364/OE.443246
Optics Express, 29(25), 42215-42224. The Optical Society
Optics Express, 29(25), 42215-42224. The Optical Society
We propose a new type of self-referencing and multiplexed refractive index (RI) sensor based on a compound optical microresonator structure consisting of Fabry-Pérot (FP) resonators coupled with microring resonators. The transmission spectra shows r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ca094461ab1ed28f84200ca4c3fc5cd
https://research.vu.nl/en/publications/02bc2073-fe71-4855-836c-ea8983ff40e2
https://research.vu.nl/en/publications/02bc2073-fe71-4855-836c-ea8983ff40e2
Autor:
Mohammad Hosein Poorghadiri, Abolfazl Abedi, Hamed Nikbakht, Majid Taghavi, Gholam-Mohammad Parsanasab, Hamid Latifi
Publikováno v:
IEEE Sensors Journal. 21:13156-13164
This paper is a report on the design and fabrication of a dual-axis micro-opto-electro-mechanical system (MOEMS) accelerometer. The device consists of a proof mass (PM) suspended by four L-shaped springs. Two Fabry-Perot (FP) cavities are formed betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b725c82993f44104c23662437f0bdbc5
https://doi.org/10.1109/jsen.2021.3072333
https://doi.org/10.1109/jsen.2021.3072333
Publikováno v:
Lu, C, Alaydrus, M, Nikbakht, H & Akca, B I 2022, ' Dynamic control of Fano resonances in a coupled dual microring resonator system ', Journal of Optics (United Kingdom), vol. 24, no. 6, 064009, pp. 1-5 . https://doi.org/10.1088/2040-8986/ac6a63
Journal of Optics (United Kingdom), 24(6):064009, 1-5. IOP Publishing
Journal of Optics (United Kingdom), 24(6):064009, 1-5. IOP Publishing
We propose a coupled optical microresonator system that can be used as a new and flexible platform to form asymmetric Fano-like resonances and dynamically control their line shapes and frequencies. The coupled microresonator system was formed using t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f4716d47e613099f80d3fafa0b4dbdc
https://hdl.handle.net/1871.1/3c4271bb-438c-4b06-b260-1532478cd23a
https://hdl.handle.net/1871.1/3c4271bb-438c-4b06-b260-1532478cd23a
Publikováno v:
Optics Letters, 47(23), 6281-6284. The Optical Society
Lu, C, Nikbakht, H, Erdolu, M Y, van Someren, B & Akca, B I 2022, ' Tapered tip optical fibers for measuring ultra-small refractive index changes with record high sensitivity ', Optics Letters, vol. 47, no. 23, pp. 6281-6284 . https://doi.org/10.1364/OL.477288
Lu, C, Nikbakht, H, Erdolu, M Y, van Someren, B & Akca, B I 2022, ' Tapered tip optical fibers for measuring ultra-small refractive index changes with record high sensitivity ', Optics Letters, vol. 47, no. 23, pp. 6281-6284 . https://doi.org/10.1364/OL.477288
Here we demonstrate an inexpensive, simple, and ultra-sensitive refractive index sensor based on a tapered tip optical fiber combined with a straightforward image analysis method. The output profile of this fiber exhibits circular fringe patterns who
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a00040dd0af8124f0798eaf8d090453
https://doi.org/10.1364/ol.477288
https://doi.org/10.1364/ol.477288
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-10 (2019)
Scientific Reports
Scientific Reports
High refractive index (RI) thin films are capable of pulling waveguide mode profiles towards themselves. In this study, it is shown that by applying high RI coatings with specific thicknesses on the side of optical waveguides, significantly different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb30187d81574863e402755d55a41713
http://link.springer.com/article/10.1038/s41598-019-48890-y
http://link.springer.com/article/10.1038/s41598-019-48890-y
Autor:
Abolfazl Abedi, Mohammad Javad Sharifi, Majid Taghavi, Hamid Latifi, Hamed Nikbakht, Gholam-Mohammad Parsanasab
Publikováno v:
Journal of Lightwave Technology. 37:1893-1902
This paper presents the design, fabrication, and characterization of a SU-8 four L-shaped beams optical micro-electro-mechanical-system accelerometer based on a Fabry–Perot (FP) interferometer. An applied acceleration causes a displacement of the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c782929a7c779b8760fbdeef4d6e4f51
https://doi.org/10.1109/jlt.2019.2894752
https://doi.org/10.1109/jlt.2019.2894752
Autor:
Hamid Latifi, Abolfazl Abedi, Manojit Pramanik, Hamed Nikbakht, Hamed Qazvini, Amir Asadollahi, Ali Rezaei
Publikováno v:
Biomedical Optics Express, 12(4), 1834-1845. The Optical Society
Asadollahi, A, Latifi, H, Pramanik, M, Qazvini, H, Rezaei, A, Nikbakht, H & Abedi, A 2021, ' Axial accuracy and signal enhancement in acoustic-resolution photoacoustic microscopy by laser jitter effect correction and pulse energy compensation ', Biomedical Optics Express, vol. 12, no. 4, pp. 1834-1845 . https://doi.org/10.1364/BOE.419564
Biomedical optics express, 12(4), 1834-1845. The Optical Society
Biomed Opt Express
Asadollahi, A, Latifi, H, Pramanik, M, Qazvini, H, Rezaei, A, Nikbakht, H & Abedi, A 2021, ' Axial accuracy and signal enhancement in acoustic-resolution photoacoustic microscopy by laser jitter effect correction and pulse energy compensation ', Biomedical Optics Express, vol. 12, no. 4, pp. 1834-1845 . https://doi.org/10.1364/BOE.419564
Biomedical optics express, 12(4), 1834-1845. The Optical Society
Biomed Opt Express
© 2021 Optical Society of AmericaIn recent years, photoacoustic imaging has found vast applications in biomedical imaging. Photoacoustic imaging has high optical contrast and high ultrasound resolution allowing deep tissue non-invasive imaging beyon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::716b03ba6bf3dad4df25ad1d8944f676
https://hdl.handle.net/10356/152399
https://hdl.handle.net/10356/152399