The Experts below are selected from a list of 10881 Experts worldwide ranked by ideXlab platform
Ibrahim Abdulhalim - One of the best experts on this subject based on the ideXlab platform.
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Sensitivity Enhancement methods for surface plasmon sensors
Laser & Photonics Reviews, 2011Co-Authors: Atef Shalabney, Ibrahim AbdulhalimAbstract:Surface plasmon resonance (SPR) sensors have been a mature technology for more than two decades now, however, recent investigations show continuous Enhancement of their Sensitivity and their lower detection limit. Together with the recent investigations in localized SPR phenomena, extraordinary optical transmission through nanoapertures in metals, and surface-enhanced spectroscopies, drastic developments are expected to revolutionize the field of optical biosensing. Sensitivity-Enhancement (SE) techniques are reviewed focusing both on the physical transduction mechanisms and the system performance. In the majority of cases the SE is associated with the Enhancement of the electromagnetic field overlap integral describing the interaction energy within the analyte. Other important mechanisms are the interaction between plasmons and excitons and between the analyte molecules and the metal surface. The lower detection limit can be reduced significantly if systems with high signal-to-noise ratio are used such as common-path interferometry, ellipsometry or polarimetry systems.
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Sensitivity‐Enhancement methods for surface plasmon sensors
Laser & Photonics Reviews, 2011Co-Authors: Atef Shalabney, Ibrahim AbdulhalimAbstract:Surface plasmon resonance (SPR) sensors have been a mature technology for more than two decades now, however, recent investigations show continuous Enhancement of their Sensitivity and their lower detection limit. Together with the recent investigations in localized SPR phenomena, extraordinary optical transmission through nanoapertures in metals, and surface-enhanced spectroscopies, drastic developments are expected to revolutionize the field of optical biosensing. Sensitivity-Enhancement (SE) techniques are reviewed focusing both on the physical transduction mechanisms and the system performance. In the majority of cases the SE is associated with the Enhancement of the electromagnetic field overlap integral describing the interaction energy within the analyte. Other important mechanisms are the interaction between plasmons and excitons and between the analyte molecules and the metal surface. The lower detection limit can be reduced significantly if systems with high signal-to-noise ratio are used such as common-path interferometry, ellipsometry or polarimetry systems.
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electromagnetic fields distribution in multilayer thin film structures and the origin of Sensitivity Enhancement in surface plasmon resonance sensors
Sensors and Actuators A-physical, 2010Co-Authors: Atef Shalabney, Ibrahim AbdulhalimAbstract:Abstract The performance of surface plasmon resonance (SPR) sensors depends on the design parameters. An algorithm for calculating the electromagnetic fields distribution in multilayer structure is developed relying on Abeles matrices method for wave propagation in isotropic stratified media. The correlation between field Enhancement and Sensitivity Enhancement is examined and found to agree with the overlap integral in the analyte region. This correlation was verified in the conventional SPR sensor based on Kretschmann configuration, and in the improved SPR sensor with high refractive index dielectric top layer for several cases, e.g. field Enhancement due to resonance, the Sensitivity dependence on the wavelength, the influence of prism refractive index on Sensitivity, and the effect of the layers materials and thicknesses.
Kenneth K. Y. Wong - One of the best experts on this subject based on the ideXlab platform.
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Optical receiver Sensitivity Enhancement by single- and dual-band fiber optical parametric amplifier.
Optics Express, 2017Co-Authors: Jiqiang Kang, Michel E. Marhic, Xie Wang, Bowen Li, Kenneth K. Y. WongAbstract:A semi-classical model is proposed theoretically and demonstrated experimentally on the optical receiver Sensitivity Enhancement by single-band (signal or idler) and dual-band (signal and idler) fiber optical parametric amplifier (FOPA). The Sensitivity Enhancement by single-band is determined by the gain of FOPA and the transmission loss of signal and idler, and it can be further improved by up to 3-dB using amplified signal and phase-conjugated idler together at dual-band configuration. The theoretical results are experimentally verified in both fiber communication and biomedical imaging applications. This detection Sensitivity Enhancement scheme can be potentially applied in the scenarios where ultrafast broadband signal at low-power level is being handled.
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Sensitivity Enhancement in swept-source optical coherence tomography by parametric balanced detector and amplifier
Cancer, 2016Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Kenneth K. Y. WongAbstract:We report a Sensitivity Enhancement method in interference signal detection of swept-source optical coherence tomography with all-fiber parametric amplifier and balanced detector. 12-dB Sensitivity improvement spanning over 76 nm was achieved.
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Sensitivity Enhancement in swept-source optical coherence tomography by parametric balanced detector and amplifier
Biomedical Optics Express, 2016Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Chandra Jinata, Kenneth K. Y. WongAbstract:We proposed a Sensitivity Enhancement method of the interference-based signal detection approach and applied it on a swept-source optical coherence tomography (SS-OCT) system through all-fiber optical parametric amplifier (FOPA) and parametric balanced detector (BD). The parametric BD was realized by combining the signal and phase conjugated idler band that was newly-generated through FOPA, and specifically by superimposing these two bands at a photodetector. The Sensitivity Enhancement by FOPA and parametric BD in SS-OCT were demonstrated experimentally. The results show that SS-OCT with FOPA and SS-OCT with parametric BD can provide more than 9 dB and 12 dB Sensitivity improvement, respectively, when compared with the conventional SS-OCT in a spectral bandwidth spanning over 76 nm. To further verify and elaborate their Sensitivity Enhancement, a bio-sample imaging experiment was conducted on loach eyes by conventional SS-OCT setup, SS-OCT with FOPA and parametric BD at different illumination power levels. All these results proved that using FOPA and parametric BD could improve the Sensitivity significantly in SS-OCT systems.
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Sensitivity Enhancement in optical coherence tomography by fiber optical parametric amplifier
Asia Communications and Photonics Conference 2015, 2015Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Kenneth K. Y. WongAbstract:We demonstrate an all-fiber optical parametric amplifier for the optical coherence tomography system with low illumination optical power for bio-sample. A 15-dB Sensitivity Enhancement is obtained in a spectral bandwidth of spanning over 100 nm.
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Sensitivity Enhancement by All-Fiber Optical Parametric Amplifier for Bioimaging at 1.0 μm
Asia Communications and Photonics Conference 2014, 2014Co-Authors: Yiqing Xu, Chi Zhang, Arnaud Mussot, Alexandre Kudlinski, Kevin K. Tsia, Kenneth K. Y. WongAbstract:We demonstrate Sensitivity Enhancement by all-fiber optical parametric amplifier for bioimaging application at 1.0 μm, incorporated with the coherently-generated idler component, which provides an extra 3-dB gain over a bandwidth of 20 THz.
Atef Shalabney - One of the best experts on this subject based on the ideXlab platform.
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Sensitivity Enhancement methods for surface plasmon sensors
Laser & Photonics Reviews, 2011Co-Authors: Atef Shalabney, Ibrahim AbdulhalimAbstract:Surface plasmon resonance (SPR) sensors have been a mature technology for more than two decades now, however, recent investigations show continuous Enhancement of their Sensitivity and their lower detection limit. Together with the recent investigations in localized SPR phenomena, extraordinary optical transmission through nanoapertures in metals, and surface-enhanced spectroscopies, drastic developments are expected to revolutionize the field of optical biosensing. Sensitivity-Enhancement (SE) techniques are reviewed focusing both on the physical transduction mechanisms and the system performance. In the majority of cases the SE is associated with the Enhancement of the electromagnetic field overlap integral describing the interaction energy within the analyte. Other important mechanisms are the interaction between plasmons and excitons and between the analyte molecules and the metal surface. The lower detection limit can be reduced significantly if systems with high signal-to-noise ratio are used such as common-path interferometry, ellipsometry or polarimetry systems.
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Sensitivity‐Enhancement methods for surface plasmon sensors
Laser & Photonics Reviews, 2011Co-Authors: Atef Shalabney, Ibrahim AbdulhalimAbstract:Surface plasmon resonance (SPR) sensors have been a mature technology for more than two decades now, however, recent investigations show continuous Enhancement of their Sensitivity and their lower detection limit. Together with the recent investigations in localized SPR phenomena, extraordinary optical transmission through nanoapertures in metals, and surface-enhanced spectroscopies, drastic developments are expected to revolutionize the field of optical biosensing. Sensitivity-Enhancement (SE) techniques are reviewed focusing both on the physical transduction mechanisms and the system performance. In the majority of cases the SE is associated with the Enhancement of the electromagnetic field overlap integral describing the interaction energy within the analyte. Other important mechanisms are the interaction between plasmons and excitons and between the analyte molecules and the metal surface. The lower detection limit can be reduced significantly if systems with high signal-to-noise ratio are used such as common-path interferometry, ellipsometry or polarimetry systems.
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electromagnetic fields distribution in multilayer thin film structures and the origin of Sensitivity Enhancement in surface plasmon resonance sensors
Sensors and Actuators A-physical, 2010Co-Authors: Atef Shalabney, Ibrahim AbdulhalimAbstract:Abstract The performance of surface plasmon resonance (SPR) sensors depends on the design parameters. An algorithm for calculating the electromagnetic fields distribution in multilayer structure is developed relying on Abeles matrices method for wave propagation in isotropic stratified media. The correlation between field Enhancement and Sensitivity Enhancement is examined and found to agree with the overlap integral in the analyte region. This correlation was verified in the conventional SPR sensor based on Kretschmann configuration, and in the improved SPR sensor with high refractive index dielectric top layer for several cases, e.g. field Enhancement due to resonance, the Sensitivity dependence on the wavelength, the influence of prism refractive index on Sensitivity, and the effect of the layers materials and thicknesses.
Jiqiang Kang - One of the best experts on this subject based on the ideXlab platform.
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Optical receiver Sensitivity Enhancement by single- and dual-band fiber optical parametric amplifier.
Optics Express, 2017Co-Authors: Jiqiang Kang, Michel E. Marhic, Xie Wang, Bowen Li, Kenneth K. Y. WongAbstract:A semi-classical model is proposed theoretically and demonstrated experimentally on the optical receiver Sensitivity Enhancement by single-band (signal or idler) and dual-band (signal and idler) fiber optical parametric amplifier (FOPA). The Sensitivity Enhancement by single-band is determined by the gain of FOPA and the transmission loss of signal and idler, and it can be further improved by up to 3-dB using amplified signal and phase-conjugated idler together at dual-band configuration. The theoretical results are experimentally verified in both fiber communication and biomedical imaging applications. This detection Sensitivity Enhancement scheme can be potentially applied in the scenarios where ultrafast broadband signal at low-power level is being handled.
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Sensitivity Enhancement in swept-source optical coherence tomography by parametric balanced detector and amplifier
Cancer, 2016Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Kenneth K. Y. WongAbstract:We report a Sensitivity Enhancement method in interference signal detection of swept-source optical coherence tomography with all-fiber parametric amplifier and balanced detector. 12-dB Sensitivity improvement spanning over 76 nm was achieved.
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Sensitivity Enhancement in swept-source optical coherence tomography by parametric balanced detector and amplifier
Biomedical Optics Express, 2016Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Chandra Jinata, Kenneth K. Y. WongAbstract:We proposed a Sensitivity Enhancement method of the interference-based signal detection approach and applied it on a swept-source optical coherence tomography (SS-OCT) system through all-fiber optical parametric amplifier (FOPA) and parametric balanced detector (BD). The parametric BD was realized by combining the signal and phase conjugated idler band that was newly-generated through FOPA, and specifically by superimposing these two bands at a photodetector. The Sensitivity Enhancement by FOPA and parametric BD in SS-OCT were demonstrated experimentally. The results show that SS-OCT with FOPA and SS-OCT with parametric BD can provide more than 9 dB and 12 dB Sensitivity improvement, respectively, when compared with the conventional SS-OCT in a spectral bandwidth spanning over 76 nm. To further verify and elaborate their Sensitivity Enhancement, a bio-sample imaging experiment was conducted on loach eyes by conventional SS-OCT setup, SS-OCT with FOPA and parametric BD at different illumination power levels. All these results proved that using FOPA and parametric BD could improve the Sensitivity significantly in SS-OCT systems.
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Sensitivity Enhancement in optical coherence tomography by fiber optical parametric amplifier
Asia Communications and Photonics Conference 2015, 2015Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Kenneth K. Y. WongAbstract:We demonstrate an all-fiber optical parametric amplifier for the optical coherence tomography system with low illumination optical power for bio-sample. A 15-dB Sensitivity Enhancement is obtained in a spectral bandwidth of spanning over 100 nm.
Xie Wang - One of the best experts on this subject based on the ideXlab platform.
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Optical receiver Sensitivity Enhancement by single- and dual-band fiber optical parametric amplifier.
Optics Express, 2017Co-Authors: Jiqiang Kang, Michel E. Marhic, Xie Wang, Bowen Li, Kenneth K. Y. WongAbstract:A semi-classical model is proposed theoretically and demonstrated experimentally on the optical receiver Sensitivity Enhancement by single-band (signal or idler) and dual-band (signal and idler) fiber optical parametric amplifier (FOPA). The Sensitivity Enhancement by single-band is determined by the gain of FOPA and the transmission loss of signal and idler, and it can be further improved by up to 3-dB using amplified signal and phase-conjugated idler together at dual-band configuration. The theoretical results are experimentally verified in both fiber communication and biomedical imaging applications. This detection Sensitivity Enhancement scheme can be potentially applied in the scenarios where ultrafast broadband signal at low-power level is being handled.
-
Sensitivity Enhancement in swept-source optical coherence tomography by parametric balanced detector and amplifier
Cancer, 2016Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Kenneth K. Y. WongAbstract:We report a Sensitivity Enhancement method in interference signal detection of swept-source optical coherence tomography with all-fiber parametric amplifier and balanced detector. 12-dB Sensitivity improvement spanning over 76 nm was achieved.
-
Sensitivity Enhancement in swept-source optical coherence tomography by parametric balanced detector and amplifier
Biomedical Optics Express, 2016Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Chandra Jinata, Kenneth K. Y. WongAbstract:We proposed a Sensitivity Enhancement method of the interference-based signal detection approach and applied it on a swept-source optical coherence tomography (SS-OCT) system through all-fiber optical parametric amplifier (FOPA) and parametric balanced detector (BD). The parametric BD was realized by combining the signal and phase conjugated idler band that was newly-generated through FOPA, and specifically by superimposing these two bands at a photodetector. The Sensitivity Enhancement by FOPA and parametric BD in SS-OCT were demonstrated experimentally. The results show that SS-OCT with FOPA and SS-OCT with parametric BD can provide more than 9 dB and 12 dB Sensitivity improvement, respectively, when compared with the conventional SS-OCT in a spectral bandwidth spanning over 76 nm. To further verify and elaborate their Sensitivity Enhancement, a bio-sample imaging experiment was conducted on loach eyes by conventional SS-OCT setup, SS-OCT with FOPA and parametric BD at different illumination power levels. All these results proved that using FOPA and parametric BD could improve the Sensitivity significantly in SS-OCT systems.
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Sensitivity Enhancement in optical coherence tomography by fiber optical parametric amplifier
Asia Communications and Photonics Conference 2015, 2015Co-Authors: Jiqiang Kang, Xie Wang, Bowen Li, Luoqin Yu, Kenneth K. Y. WongAbstract:We demonstrate an all-fiber optical parametric amplifier for the optical coherence tomography system with low illumination optical power for bio-sample. A 15-dB Sensitivity Enhancement is obtained in a spectral bandwidth of spanning over 100 nm.
