Pub Date : 2015-03-14DOI: 10.5220/0005249700050012
C. Lefort, Hussein Hamzeh, Liu Wei, D. Sevrain, P. Leproux, F. Pain, D. A. Haidar
The development of a nonlinear endomicroscope is justified by the need for a non-invasive diagnosis tool to assess at the cellular level, in vivo and in live the presence of pathologies like cancer in a patient body. To do so, an important effort has to be made in the miniaturization of the distal head of the endoscope. We report in this paper our work on the characterization of a commercial gradient index (GRIN) lens, especially its possible fluorescence emission and ability to image biological structures. We show that the fluorescence of the peripheral glue of the GRIN lens does not have impact on the fluorescence images but can lead to perturbations to measure fluorescence lifetime and emission spectrum. The axial and lateral resolutions are obtained by imaging 1 μm diameter gold beads. The results show a good agreement with values from the literature. Finally, we simulate an endomicroscope combining an appropriate double-clad fibre (DCF) with the GRIN lens and a tubular piezoelectric scanner (PZT) scanning head. Variations of parameters values like fibre tilt angle and distance between the DCF and the GRIN lens allow to discuss on the performances of this device in terms of working distance (WD), magnification, field of view (FOV) and coupling efficiency.
{"title":"Design of an optimized distal optic for non linear endomicroscopy","authors":"C. Lefort, Hussein Hamzeh, Liu Wei, D. Sevrain, P. Leproux, F. Pain, D. A. Haidar","doi":"10.5220/0005249700050012","DOIUrl":"https://doi.org/10.5220/0005249700050012","url":null,"abstract":"The development of a nonlinear endomicroscope is justified by the need for a non-invasive diagnosis tool to assess at the cellular level, in vivo and in live the presence of pathologies like cancer in a patient body. To do so, an important effort has to be made in the miniaturization of the distal head of the endoscope. We report in this paper our work on the characterization of a commercial gradient index (GRIN) lens, especially its possible fluorescence emission and ability to image biological structures. We show that the fluorescence of the peripheral glue of the GRIN lens does not have impact on the fluorescence images but can lead to perturbations to measure fluorescence lifetime and emission spectrum. The axial and lateral resolutions are obtained by imaging 1 μm diameter gold beads. The results show a good agreement with values from the literature. Finally, we simulate an endomicroscope combining an appropriate double-clad fibre (DCF) with the GRIN lens and a tubular piezoelectric scanner (PZT) scanning head. Variations of parameters values like fibre tilt angle and distance between the DCF and the GRIN lens allow to discuss on the performances of this device in terms of working distance (WD), magnification, field of view (FOV) and coupling efficiency.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124845225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005335100340039
Alireza Tavousi, A. Rostami, G. Rostami, M. Dolatyari
In this paper, we present a three dimensional numerical study on a terahertz frequency multiplier. The process of frequency multiplication is proposed via study of spontaneous Smith-Purcell (SP) radiation. Through introducing a single electron bunch perturbation which is passing over above a metallic grating, and due to interaction of electron bunch with surface wave, the evanescent wave radiates from the ends of the grating and the SP radiation is generated in the span of 0.466∼1.1 THz. We found that the maximum of SP radiation amplitude is distributed around 90° with the centre frequency 0f ∼0.65 THz. Simulations on the generation of SP radiation at THz frequencies have been performed with the help of the 3D particle-in-cell (PIC) finite integral method and results agree very well with analytic ones.
{"title":"3-D analysis of terahertz frequency multiplier excited due to interaction of convection electron beam and surface waves (Smith-Purcell effect)","authors":"Alireza Tavousi, A. Rostami, G. Rostami, M. Dolatyari","doi":"10.5220/0005335100340039","DOIUrl":"https://doi.org/10.5220/0005335100340039","url":null,"abstract":"In this paper, we present a three dimensional numerical study on a terahertz frequency multiplier. The process of frequency multiplication is proposed via study of spontaneous Smith-Purcell (SP) radiation. Through introducing a single electron bunch perturbation which is passing over above a metallic grating, and due to interaction of electron bunch with surface wave, the evanescent wave radiates from the ends of the grating and the SP radiation is generated in the span of 0.466∼1.1 THz. We found that the maximum of SP radiation amplitude is distributed around 90° with the centre frequency 0f ∼0.65 THz. Simulations on the generation of SP radiation at THz frequencies have been performed with the help of the 3D particle-in-cell (PIC) finite integral method and results agree very well with analytic ones.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124792961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005332900810086
A. Roszkiewicz
This paper presents an analysis of phenomena leading to high and broadband absorption at a structure combined of three elements: one-dimensional dielectric diffraction grating placed between silver grating and a thick silver substrate. Each element of the dielectric grating consists of media of different dielectric constants but of the same geometrical dimensions. A broad spectrum of high absorption in such a structure is achieved as a result of two issues. First, due to the different excitation conditions the cavity resonances are excited at different wavelengths. Second, the changed order of the resonators leads to further broadening of the absorption band.
{"title":"Broadband absorption in the cavity resonators with changed order","authors":"A. Roszkiewicz","doi":"10.5220/0005332900810086","DOIUrl":"https://doi.org/10.5220/0005332900810086","url":null,"abstract":"This paper presents an analysis of phenomena leading to high and broadband absorption at a structure combined of three elements: one-dimensional dielectric diffraction grating placed between silver grating and a thick silver substrate. Each element of the dielectric grating consists of media of different dielectric constants but of the same geometrical dimensions. A broad spectrum of high absorption in such a structure is achieved as a result of two issues. First, due to the different excitation conditions the cavity resonances are excited at different wavelengths. Second, the changed order of the resonators leads to further broadening of the absorption band.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123190490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005325200050013
Y. N. Wijayanto, A. Kanno, H. Murata, Sinya Nakajima, T. Kawanishi, Y. Okamura
In Fibre-Wireless (Fi-Wi) links, conversion devices between wireless microwave/ millimetre-wave and lightwave signals are required. In this paper, we propose a wireless millimetre-wave-lightwave signal converter using an electro-optic (EO) modulator with Quasi-Phase-Matching (QPM) array of orthogonal-gap-embedded patch-antennas on a low-k dielectric material. Wireless millimetre-wave signals can be received and converted directly to lightwave signals using the proposed device. It can be operated with no external power supply and extremely-low millimetre-wave losses. The orthogonal-gap-embedded patch-antennas can be used for receiving dual-linearized or circular polarizations of wireless millimetre-wave signals. The QPM array structure can be adopted for enhancing modulation efficiency by transit-time effects consideration. Structure, analysis, and experimental of the proposed device are discussed for 40GHz operational millimetre-wave bands.
{"title":"Millimetre-wave electro-optic modulator with quasi-phase-matching array of orthogonal-gap-embedded patch-antennas on low-k dielectric material","authors":"Y. N. Wijayanto, A. Kanno, H. Murata, Sinya Nakajima, T. Kawanishi, Y. Okamura","doi":"10.5220/0005325200050013","DOIUrl":"https://doi.org/10.5220/0005325200050013","url":null,"abstract":"In Fibre-Wireless (Fi-Wi) links, conversion devices between wireless microwave/ millimetre-wave and lightwave signals are required. In this paper, we propose a wireless millimetre-wave-lightwave signal converter using an electro-optic (EO) modulator with Quasi-Phase-Matching (QPM) array of orthogonal-gap-embedded patch-antennas on a low-k dielectric material. Wireless millimetre-wave signals can be received and converted directly to lightwave signals using the proposed device. It can be operated with no external power supply and extremely-low millimetre-wave losses. The orthogonal-gap-embedded patch-antennas can be used for receiving dual-linearized or circular polarizations of wireless millimetre-wave signals. The QPM array structure can be adopted for enhancing modulation efficiency by transit-time effects consideration. Structure, analysis, and experimental of the proposed device are discussed for 40GHz operational millimetre-wave bands.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134184089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005403801220127
F. Potemkin, E. Mareev, A. A. Podshivalov, V. Gordienko
A whole life-cycle of the superfilamentation in water in tight focusing geometry was investigated. In this regime a single continuous plasma channel is formed. To achieve this specific regime the principal requirement is the usage of tight focusing and supercritical power of laser radiation. They together clamp the energy in the ultra-thin (approximately several microns) channel with a uniform plasma density distribution in it. The superfilament becomes a center of cylindrical cavitation bubble area and shock wave formation. The length of the filament increases logarithmically with laser pulse energy. The linear absorption decreases the incoming energy delivered to the focal spot, which dramatically complicates the filament formation, especially in the case of loose focusing. Aberrations added to the optical scheme lead to multiple dotted plasma sources for shock wave formation, spaced along the axis of pulse propagation. Increasing the laser energy launches the filaments at each of the dot, whose overlapping leads to enhance the length of the whole filament.
{"title":"Whole life-cycle of superfilament in water from femtoseconds up to microseconds","authors":"F. Potemkin, E. Mareev, A. A. Podshivalov, V. Gordienko","doi":"10.5220/0005403801220127","DOIUrl":"https://doi.org/10.5220/0005403801220127","url":null,"abstract":"A whole life-cycle of the superfilamentation in water in tight focusing geometry was investigated. In this regime a single continuous plasma channel is formed. To achieve this specific regime the principal requirement is the usage of tight focusing and supercritical power of laser radiation. They together clamp the energy in the ultra-thin (approximately several microns) channel with a uniform plasma density distribution in it. The superfilament becomes a center of cylindrical cavitation bubble area and shock wave formation. The length of the filament increases logarithmically with laser pulse energy. The linear absorption decreases the incoming energy delivered to the focal spot, which dramatically complicates the filament formation, especially in the case of loose focusing. Aberrations added to the optical scheme lead to multiple dotted plasma sources for shock wave formation, spaced along the axis of pulse propagation. Increasing the laser energy launches the filaments at each of the dot, whose overlapping leads to enhance the length of the whole filament.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132834676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005333600220033
B. Singh, P. Pandey
A study on the tunability of photonic and Omni-directional band gaps has been demonstrated theoretically in one-dimensional (1-D) photonic crystals having one of the layers as exponential graded index materials and other layers of constant refractive index materials. Using numerical simulations, we have investigated the effect of relative parameters of exponential graded layers on the photonic and Omni-directional band gaps in 1-D graded photonic crystals (GPCs). We observe that the number of photonic band gaps increases with increase of the layer thicknesses and their bandwidths can be controlled by the contrast between initial and final refractive index of the graded layers. Moreover, we have studied the Omni-directional band gaps in quarter-wave and latent type layer stacking arrangements. Further, we obtained the range of refractive indices and thicknesses of constituted layers at which omnidirectional band gaps occurs. Accordingly, we find that the photonic as well as Omni-directional band gaps of desired bandwidths can be obtained by selecting appropriate parameters in GPCs. Our work will be useful in design of mirrors, channel filters, Optical sensors, Omni-directional reflectors etc. and provide more design freedom for alternative photonic devices.
{"title":"Tunable mirror and multi-channel filter based on one-dimensional exponentially graded photonic crystals","authors":"B. Singh, P. Pandey","doi":"10.5220/0005333600220033","DOIUrl":"https://doi.org/10.5220/0005333600220033","url":null,"abstract":"A study on the tunability of photonic and Omni-directional band gaps has been demonstrated theoretically in one-dimensional (1-D) photonic crystals having one of the layers as exponential graded index materials and other layers of constant refractive index materials. Using numerical simulations, we have investigated the effect of relative parameters of exponential graded layers on the photonic and Omni-directional band gaps in 1-D graded photonic crystals (GPCs). We observe that the number of photonic band gaps increases with increase of the layer thicknesses and their bandwidths can be controlled by the contrast between initial and final refractive index of the graded layers. Moreover, we have studied the Omni-directional band gaps in quarter-wave and latent type layer stacking arrangements. Further, we obtained the range of refractive indices and thicknesses of constituted layers at which omnidirectional band gaps occurs. Accordingly, we find that the photonic as well as Omni-directional band gaps of desired bandwidths can be obtained by selecting appropriate parameters in GPCs. Our work will be useful in design of mirrors, channel filters, Optical sensors, Omni-directional reflectors etc. and provide more design freedom for alternative photonic devices.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133297587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005403201210124
L. Loghina, J. Teteris, M. Vlcek
The studies of direct holographic recording of the surface relief gratings on amorphous As40S60-xSex thin films are presented. These gratings were created upon exposure to polarized laser beams of various wavelengths (λ = 473 - 650 nm). The orthogonally ±45° linearly polarized light beams were used for recording. The surface structure of the relief gratings was investigated by atomic force microscopy. The influence of laser beam wavelength and spatial frequency of the gratings recorded (grating period ?) on the surface relief gratings formation for every composition was examined.
{"title":"Holographic recording of surface relief gratings on As40S60−xSex thin films","authors":"L. Loghina, J. Teteris, M. Vlcek","doi":"10.5220/0005403201210124","DOIUrl":"https://doi.org/10.5220/0005403201210124","url":null,"abstract":"The studies of direct holographic recording of the surface relief gratings on amorphous As40S60-xSex thin films are presented. These gratings were created upon exposure to polarized laser beams of various wavelengths (λ = 473 - 650 nm). The orthogonally ±45° linearly polarized light beams were used for recording. The surface structure of the relief gratings was investigated by atomic force microscopy. The influence of laser beam wavelength and spatial frequency of the gratings recorded (grating period ?) on the surface relief gratings formation for every composition was examined.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133185297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005432401560167
N. Raoufi, F. Surre, M. Rajarajan, T. Sun, K. Grattan
Stable and reliable pH optical sensor is important for many industrial applications. The layer-by-layer deposition technique is a simple and versatile method used to deposit a sensitive thin film on such an optical fibre-based device but creating a coating which can often be destroyed in use in highly acid or alkali solutions. It is thus important to create stable and durable sensors for operation under these extreme environments. The main aim of this study has been to prepare a number of such sensors and compare the performance of three different stabilization approaches used for the development of an effective wavelength-dependent pH-sensitive optical sensor. Techniques such as employing heat treatment, the deposition of two layers of a PAH/SiO2 thin film and the deposition of two layers APTMS/SiO2 as topping layers have been studied to determine the optimum approach to creating a desirable sensor - one yielding the same value of peak wavelength for a measurement of a known value of pH and to do so repeatedly. An improvement in performance and in shelf-life, stability and re-usability of the sensor has been achieved by the addition of two bilayers of APTMS/SiO2 in the work carried out and the results of the investigation undertaken are reported.
{"title":"Enhanced stability and re-usability of the optical sensor for pH monitoring using a layer-by-layer deposition technique","authors":"N. Raoufi, F. Surre, M. Rajarajan, T. Sun, K. Grattan","doi":"10.5220/0005432401560167","DOIUrl":"https://doi.org/10.5220/0005432401560167","url":null,"abstract":"Stable and reliable pH optical sensor is important for many industrial applications. The layer-by-layer deposition technique is a simple and versatile method used to deposit a sensitive thin film on such an optical fibre-based device but creating a coating which can often be destroyed in use in highly acid or alkali solutions. It is thus important to create stable and durable sensors for operation under these extreme environments. The main aim of this study has been to prepare a number of such sensors and compare the performance of three different stabilization approaches used for the development of an effective wavelength-dependent pH-sensitive optical sensor. Techniques such as employing heat treatment, the deposition of two layers of a PAH/SiO2 thin film and the deposition of two layers APTMS/SiO2 as topping layers have been studied to determine the optimum approach to creating a desirable sensor - one yielding the same value of peak wavelength for a measurement of a known value of pH and to do so repeatedly. An improvement in performance and in shelf-life, stability and re-usability of the sensor has been achieved by the addition of two bilayers of APTMS/SiO2 in the work carried out and the results of the investigation undertaken are reported.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126184342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005289500690072
S. Zandi, A. Rostami, G. Rostami, M. Dolatyari
We investigate coupling and power transfer between two transverse modes in a single quantum-well traveling wave semiconductor optical amplifier (SOAs) by non-degenerate four wave mixing. By this approach the mode purity achieve 99.99% at the end of active region of SOA and the mode conversion can be controlled by the adjusting pump and probe power.
{"title":"Spatial mode conversion by non-degenerate four wave mixing","authors":"S. Zandi, A. Rostami, G. Rostami, M. Dolatyari","doi":"10.5220/0005289500690072","DOIUrl":"https://doi.org/10.5220/0005289500690072","url":null,"abstract":"We investigate coupling and power transfer between two transverse modes in a single quantum-well traveling wave semiconductor optical amplifier (SOAs) by non-degenerate four wave mixing. By this approach the mode purity achieve 99.99% at the end of active region of SOA and the mode conversion can be controlled by the adjusting pump and probe power.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125054536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-03-13DOI: 10.5220/0005336600910095
G. Giubileo, I. Calderari, A. Puiu
The identification of sophistication in beverage and food products has an increasing role in modern society. Different techniques are currently used for qualitative assessment of food stuff and beverages. Among them high resolution spectroscopy shown to be able to identify different types of sweeteners such as fructose, glucose, maltose, sucrose and aspartame. To this purpose, a reliable, fast and easy-to-use screening method for the optical characterization of these substances was developed. In the present work the Infrared Laser Photo-Acoustic Spectroscopy was used to record high resolution infrared absorption spectra of common sugars in the fingerprint region, not previously reported in literature at our knowledge. Spectral data were obtained by a CO2 laser based optical apparatus. These preliminary results are the key toward a further analysis of sweeteners in a complex matrix devoted to detecting adulteration of commercial fruit juices and light drinks by low cost sweeteners.
{"title":"High resolution spectroscopy of sweeteners","authors":"G. Giubileo, I. Calderari, A. Puiu","doi":"10.5220/0005336600910095","DOIUrl":"https://doi.org/10.5220/0005336600910095","url":null,"abstract":"The identification of sophistication in beverage and food products has an increasing role in modern society. Different techniques are currently used for qualitative assessment of food stuff and beverages. Among them high resolution spectroscopy shown to be able to identify different types of sweeteners such as fructose, glucose, maltose, sucrose and aspartame. To this purpose, a reliable, fast and easy-to-use screening method for the optical characterization of these substances was developed. In the present work the Infrared Laser Photo-Acoustic Spectroscopy was used to record high resolution infrared absorption spectra of common sugars in the fingerprint region, not previously reported in literature at our knowledge. Spectral data were obtained by a CO2 laser based optical apparatus. These preliminary results are the key toward a further analysis of sweeteners in a complex matrix devoted to detecting adulteration of commercial fruit juices and light drinks by low cost sweeteners.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127469199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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