Pub Date : 2015-03-13DOI: 10.5220/0005252801490156
A. Bogatskaya, A. Popov, E. Volkova
The evolution of strongly non-equilibrium plasma in a channel created in xenon by powerful KrF - femtosecond laser pulse is studied. It is demonstrated that such a plasma channel can be used as a waveguide for both transportation and amplification of the microwave radiation. The specific features of such a plasma waveguide are studied on the basis of the self-consistent solution of the kinetic Boltzmann equation for the electron energy distribution function in different spatial points of the gas media and the wave equation in paraxial approximation for the microwave radiation guided and amplified in the channel. The amplification factor in dependence on plasma channel radius, intensity and frequency of the input RF radiation is analyzed.
{"title":"Specific electrodynamic features of a plasma channel created in gas by powerful femtosecond UV laser pulse application to the problem of guiding and amplification of microwave radiation","authors":"A. Bogatskaya, A. Popov, E. Volkova","doi":"10.5220/0005252801490156","DOIUrl":"https://doi.org/10.5220/0005252801490156","url":null,"abstract":"The evolution of strongly non-equilibrium plasma in a channel created in xenon by powerful KrF - femtosecond laser pulse is studied. It is demonstrated that such a plasma channel can be used as a waveguide for both transportation and amplification of the microwave radiation. The specific features of such a plasma waveguide are studied on the basis of the self-consistent solution of the kinetic Boltzmann equation for the electron energy distribution function in different spatial points of the gas media and the wave equation in paraxial approximation for the microwave radiation guided and amplified in the channel. The amplification factor in dependence on plasma channel radius, intensity and frequency of the input RF radiation is analyzed.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"32 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":"114809895","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: 10.5220/0005334400780084
S. Ivanov, N. Nikonorov, Alexander Ignatiev
Review on latest modification applappliedied to chemical composition of PTR glass was made. Advancements of updated chemical composition of PTR glass was shown in comparison with commercially produced glass. Such properties as refractive index change, optimal exposition and optical losses in visible range for the glass with recorded hologram was studied. In work samples of two chemical compositions were studied. Conditions of matching included equal regimes of thermal treatment and expose dosages as well as optimized parameters for each composition. Also the study of holograms received at optimal parameters for each glass was made on three different wavelengths. Moreover several new applications for holograms on a modified PTR glass were tested: such as holographic marks in telescopic systems and complex linked holograms. Due to high transparency in visible range, PTR glass now can be applied for creating holographic marks in telescopic systems. Studies show transparency of 92% with Fresnel losses. Also it is found that spectral selectivity is maintained for such holograms, thus it is opening a new way of optical solutions in telescopic systems. As it was measured, spectral selectivity of recorded hologram corresponds to 400mkm efficient thickness according to calculations. Though, it needs further studies to increase the effective thickness of such holograms as well as investigations of different Bragg angles at recording step. Complex (linked) holography is another way of multiplexing inside a bulk glass. It leads to combination of reflecting and transmitting Bragg gratings as a unite element with proper functions. This, for instance, can provide positive feedback for complexes of laser diode crystals on a small size site. Simultaneously, such element can combine emission from all emitting surfaces in one beam. This study may lead to creation of high power coherent diode laser sources at small size site with ultra-narrow emitting bandwidth and high quality spatial beam characteristics.
{"title":"Latest achievements in chemical composition optimization of photo-thermo-refractive glass and its applications","authors":"S. Ivanov, N. Nikonorov, Alexander Ignatiev","doi":"10.5220/0005334400780084","DOIUrl":"https://doi.org/10.5220/0005334400780084","url":null,"abstract":"Review on latest modification applappliedied to chemical composition of PTR glass was made. Advancements of updated chemical composition of PTR glass was shown in comparison with commercially produced glass. Such properties as refractive index change, optimal exposition and optical losses in visible range for the glass with recorded hologram was studied. In work samples of two chemical compositions were studied. Conditions of matching included equal regimes of thermal treatment and expose dosages as well as optimized parameters for each composition. Also the study of holograms received at optimal parameters for each glass was made on three different wavelengths. Moreover several new applications for holograms on a modified PTR glass were tested: such as holographic marks in telescopic systems and complex linked holograms. Due to high transparency in visible range, PTR glass now can be applied for creating holographic marks in telescopic systems. Studies show transparency of 92% with Fresnel losses. Also it is found that spectral selectivity is maintained for such holograms, thus it is opening a new way of optical solutions in telescopic systems. As it was measured, spectral selectivity of recorded hologram corresponds to 400mkm efficient thickness according to calculations. Though, it needs further studies to increase the effective thickness of such holograms as well as investigations of different Bragg angles at recording step. Complex (linked) holography is another way of multiplexing inside a bulk glass. It leads to combination of reflecting and transmitting Bragg gratings as a unite element with proper functions. This, for instance, can provide positive feedback for complexes of laser diode crystals on a small size site. Simultaneously, such element can combine emission from all emitting surfaces in one beam. This study may lead to creation of high power coherent diode laser sources at small size site with ultra-narrow emitting bandwidth and high quality spatial beam characteristics.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"272 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":"116081287","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: 10.5220/0005431101710175
Arim Lee, C. Park, Rinah Kim, H. Joo, J. Moon
Once decommissioning of a nuclear facility is completed, it shall be confirmed if its site meets the site release criteria. For this the residual radioactivity in the site should be measured and assessed. This paper developed and characterized the fiber-optic sensor with a large surface area for measurement of radioactivity in soil at nuclear facility site, which is less time-consuming due to ease of measurement. The fiber-optic sensor consisted of a radiation sensing probe including scintillator panel and light guide and a transmission optical fiber. The light measuring system was assembled combining it with photomultiplier tube, pre-amplifier, multichannel analyser and display. Several measurements using the light measuring system showed that, as for measuring time for measurement of cesium-137 source, 1,800 sec was the optical measurement duration, and as for reflector, aluminium foil was the best.
{"title":"Development of the fiber-optic sensor with a large surface area to measure radioactive contamination in soil at nuclear facility site","authors":"Arim Lee, C. Park, Rinah Kim, H. Joo, J. Moon","doi":"10.5220/0005431101710175","DOIUrl":"https://doi.org/10.5220/0005431101710175","url":null,"abstract":"Once decommissioning of a nuclear facility is completed, it shall be confirmed if its site meets the site release criteria. For this the residual radioactivity in the site should be measured and assessed. This paper developed and characterized the fiber-optic sensor with a large surface area for measurement of radioactivity in soil at nuclear facility site, which is less time-consuming due to ease of measurement. The fiber-optic sensor consisted of a radiation sensing probe including scintillator panel and light guide and a transmission optical fiber. The light measuring system was assembled combining it with photomultiplier tube, pre-amplifier, multichannel analyser and display. Several measurements using the light measuring system showed that, as for measuring time for measurement of cesium-137 source, 1,800 sec was the optical measurement duration, and as for reflector, aluminium foil was the best.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"65 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":"133266898","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: 10.5220/0005338301030107
M. Bouška, P. Hawlová, V. Nazabal, L. Beneš, P. Němec
Pulsed laser deposition was used for the fabrication of amorphous thin films from Ge-As-Te system with the aim to study their intrinsic photostability. Photostability of prepared layers was studied using spectroscopic ellipsometry within as-deposited as well as relaxed layers. For irradiation, laser sources operating at three energies (1.17, 0.92 and 0.8 eV) in band gap region of the studied materials were employed. The lowest values of photorefraction (refractive index changes) accompanied with lowest changes of band gap values present Ge20As20Te60 thin films, which are therefore considered as the layers with highest photostability, especially in relaxed state.
{"title":"Amorphous Ge-As-Te thin films prepared by pulsed laser deposition: A photostability study","authors":"M. Bouška, P. Hawlová, V. Nazabal, L. Beneš, P. Němec","doi":"10.5220/0005338301030107","DOIUrl":"https://doi.org/10.5220/0005338301030107","url":null,"abstract":"Pulsed laser deposition was used for the fabrication of amorphous thin films from Ge-As-Te system with the aim to study their intrinsic photostability. Photostability of prepared layers was studied using spectroscopic ellipsometry within as-deposited as well as relaxed layers. For irradiation, laser sources operating at three energies (1.17, 0.92 and 0.8 eV) in band gap region of the studied materials were employed. The lowest values of photorefraction (refractive index changes) accompanied with lowest changes of band gap values present Ge20As20Te60 thin films, which are therefore considered as the layers with highest photostability, especially in relaxed state.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"88 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":"128773082","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: 10.5220/0005337601130117
M. Keshavarz, S. Khosravi, A. Rostami, G. Rostami, M. Dolatyari
In this paper, a composite medium based metamaterial with random distribution of nanoparticles in vacuum host to achieve negative effective refractive index in the visible wavelength range is suggested for invisibility purposes. Our calculations show that structures including single metal (dielectric) spheres and core-shell structures with metallic core and dielectric shell, which consists two-layer particles with uniform sizes cannot support negative effective refractive index. For this purpose the structures consist of two-layer nanospheres with different sizes and fill fraction has been proposed. Since, band width of negative refractive index is narrow, the three layer nanospheres has been studied and investigated. We show that in this case with increasing the refractive index of middle and outer layers, negative value of effective refractive index can be increased. Also, we show that using different sizes of nanomaterials in host medium, band width is increased. Finally, superposition of three layer spherical nanoparticles with different outer radius and applied single doped semiconductor spheres, has been proposed. We show that Band width with negative permittivity and permeability can be optimized.
{"title":"Broadband negative refractive index in the visible spectrum","authors":"M. Keshavarz, S. Khosravi, A. Rostami, G. Rostami, M. Dolatyari","doi":"10.5220/0005337601130117","DOIUrl":"https://doi.org/10.5220/0005337601130117","url":null,"abstract":"In this paper, a composite medium based metamaterial with random distribution of nanoparticles in vacuum host to achieve negative effective refractive index in the visible wavelength range is suggested for invisibility purposes. Our calculations show that structures including single metal (dielectric) spheres and core-shell structures with metallic core and dielectric shell, which consists two-layer particles with uniform sizes cannot support negative effective refractive index. For this purpose the structures consist of two-layer nanospheres with different sizes and fill fraction has been proposed. Since, band width of negative refractive index is narrow, the three layer nanospheres has been studied and investigated. We show that in this case with increasing the refractive index of middle and outer layers, negative value of effective refractive index can be increased. Also, we show that using different sizes of nanomaterials in host medium, band width is increased. Finally, superposition of three layer spherical nanoparticles with different outer radius and applied single doped semiconductor spheres, has been proposed. We show that Band width with negative permittivity and permeability can be optimized.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"41 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":"128778282","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: 10.5220/0005432001470155
Z. El Rawashdeh, P. Revel, C. Prelle, F. Lamarque
This paper presents the initial design of a new fiber-optic displacement sensor; it is used to measure the linear displacement of an actuator performing a helical movement. This sensor consists of a set of assembled cones, which constitute a reflective grating, and two fiber-optic probes. It is characterised by its ability to measure the displacement along a millimetric range, with a high sub-micrometric resolution. In this work, the geometric model of the sensor is presented as well in terms of single probe response in front of a curved reflective surface as in terms of grating shape which authorizes the measurement principle. This grating design makes the displacement measurement possible due to the overlap of the two probes simulated output signals. The single probe measurement in front of a curved reflective surface demonstrates a good agreement with simulation results. A prototype of the cones-assembled grating has been fabricated using a high precision turning machine and a single-crystal diamond tool on an aluminium alloy; the geometric parameters of the fabricated grating were evaluated with the help of a Nanofocus™ μscan optical profilometer. The agreement between the simulated geometric parameters and the real parameters is very good.
{"title":"Cones-assembled grating for long-range fiber-optic linear displacement sensor","authors":"Z. El Rawashdeh, P. Revel, C. Prelle, F. Lamarque","doi":"10.5220/0005432001470155","DOIUrl":"https://doi.org/10.5220/0005432001470155","url":null,"abstract":"This paper presents the initial design of a new fiber-optic displacement sensor; it is used to measure the linear displacement of an actuator performing a helical movement. This sensor consists of a set of assembled cones, which constitute a reflective grating, and two fiber-optic probes. It is characterised by its ability to measure the displacement along a millimetric range, with a high sub-micrometric resolution. In this work, the geometric model of the sensor is presented as well in terms of single probe response in front of a curved reflective surface as in terms of grating shape which authorizes the measurement principle. This grating design makes the displacement measurement possible due to the overlap of the two probes simulated output signals. The single probe measurement in front of a curved reflective surface demonstrates a good agreement with simulation results. A prototype of the cones-assembled grating has been fabricated using a high precision turning machine and a single-crystal diamond tool on an aluminium alloy; the geometric parameters of the fabricated grating were evaluated with the help of a Nanofocus™ μscan optical profilometer. The agreement between the simulated geometric parameters and the real parameters is very good.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"134 4 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":"131030502","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: 10.5220/0005335500260030
A. Puiu, G. Giubileo, A. Palucci
The Improvised Explosive Device (IED) is the most prevalent form of explosive device utilized by terrorists today being easy to realize and difficult to detect. These explosive devices are made by mixing different precursor substances that are generally cheap and commercially available. Thus, attention should be focused on developing fast and reliable methods able to identify such substances. In this paper we applied laser photoacoustic spectroscopy method for the spectral characterization and identification of a number of common chemicals used as precursors of IEDs: potassium sulfate, potassium nitrate, magnesium sulfate, ammonium perchlorate, ammonium nitrate, and acetone. The analyzed chemical species were classified by Principal Component Analysis applied to the collected spectral data. As conclusion of the study, the laser photoacoustic spectroscopy combined with chemometrics has confirmed to be a useful tool that could support the fight against the increased realization of modern bombs for criminal use.
{"title":"Spectroscopic study of some IED's precursors by means of laser photoacoustic spectroscopy combined with multivariate analysis","authors":"A. Puiu, G. Giubileo, A. Palucci","doi":"10.5220/0005335500260030","DOIUrl":"https://doi.org/10.5220/0005335500260030","url":null,"abstract":"The Improvised Explosive Device (IED) is the most prevalent form of explosive device utilized by terrorists today being easy to realize and difficult to detect. These explosive devices are made by mixing different precursor substances that are generally cheap and commercially available. Thus, attention should be focused on developing fast and reliable methods able to identify such substances. In this paper we applied laser photoacoustic spectroscopy method for the spectral characterization and identification of a number of common chemicals used as precursors of IEDs: potassium sulfate, potassium nitrate, magnesium sulfate, ammonium perchlorate, ammonium nitrate, and acetone. The analyzed chemical species were classified by Principal Component Analysis applied to the collected spectral data. As conclusion of the study, the laser photoacoustic spectroscopy combined with chemometrics has confirmed to be a useful tool that could support the fight against the increased realization of modern bombs for criminal use.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"1 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":"124361203","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: 10.5220/0005403901280133
S. Stremoukhov, A. V. Andreev
The paper is devoted to the discussion of the main principles of the non-perturbative quantum-mechanical approach to the description of a single atom interaction with multicomponent laser fields. The main advantage of the theory is that the authors use a basis of “an atom in the field” eigenfunctions which are the exact solution of “an atom in the field” boundary value problem the Hamiltonain of which coincides with the one from the Schrodinger equation written in the velocity gauge. The theory is applied to analytical and numerical investigation of the high-order harmonic generation and the terahertz radiation generation phenomena.
{"title":"The basis of “atom in the external field” eigenfunctions to the problem of high harmonic and terahertz radiation generation study","authors":"S. Stremoukhov, A. V. Andreev","doi":"10.5220/0005403901280133","DOIUrl":"https://doi.org/10.5220/0005403901280133","url":null,"abstract":"The paper is devoted to the discussion of the main principles of the non-perturbative quantum-mechanical approach to the description of a single atom interaction with multicomponent laser fields. The main advantage of the theory is that the authors use a basis of “an atom in the field” eigenfunctions which are the exact solution of “an atom in the field” boundary value problem the Hamiltonain of which coincides with the one from the Schrodinger equation written in the velocity gauge. The theory is applied to analytical and numerical investigation of the high-order harmonic generation and the terahertz radiation generation phenomena.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"19 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":"125286861","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 : 1900-01-01DOI: 10.5220/0005333500200025
H. Chung, Chun-Ying Wu, Y. Lee
In this study, we demonstrate a rapidly, low cost, and mass production process to fabricate arrayed metallic nanoparticles on a variety of substrates based on contact transfer and metal mask embedded lithography (CMEL). A hexagonal arrayed metallic nanoparticles deployed on ITO/glass substrate with sub-micron periodicity is achieved. It is observed in optical transmittance measurements that noble metallic arrayed nanoparticles deployed on ITO/glass substrate result in a spectrally narrowband of extinction in visible range, and is in good agreement with the simulated results using finite-element method (FEM). It is found that the narrowband extinction spectrum is associated with electromagnetic field coupling between the arrayed metallic nanostructures and the ITO layer. This electromagnetic field coupling induces significant plasmon resonance in the ITO layer underneath the arrayed metallic nanostructures. Based on this observed phenomenon and our innovative large-area nano-fabrication processes, optoelectronic devices with arrayed metallic nanostructures can be easily designed and developed.
{"title":"Periodic and metallic nano-structures patterned by contact transfer lithography with application on localized surface plasmon resonance","authors":"H. Chung, Chun-Ying Wu, Y. Lee","doi":"10.5220/0005333500200025","DOIUrl":"https://doi.org/10.5220/0005333500200025","url":null,"abstract":"In this study, we demonstrate a rapidly, low cost, and mass production process to fabricate arrayed metallic nanoparticles on a variety of substrates based on contact transfer and metal mask embedded lithography (CMEL). A hexagonal arrayed metallic nanoparticles deployed on ITO/glass substrate with sub-micron periodicity is achieved. It is observed in optical transmittance measurements that noble metallic arrayed nanoparticles deployed on ITO/glass substrate result in a spectrally narrowband of extinction in visible range, and is in good agreement with the simulated results using finite-element method (FEM). It is found that the narrowband extinction spectrum is associated with electromagnetic field coupling between the arrayed metallic nanostructures and the ITO layer. This electromagnetic field coupling induces significant plasmon resonance in the ITO layer underneath the arrayed metallic nanostructures. Based on this observed phenomenon and our innovative large-area nano-fabrication processes, optoelectronic devices with arrayed metallic nanostructures can be easily designed and developed.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"39 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114045085","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 : 1900-01-01DOI: 10.5220/0005254001720176
Y. P. Huang, Y. Huang, Y. Chen
An efficient diode-side-pumped Nd:YAG/Cr4+:YAG Q-switched laser with a convex-concave resonator is employed to develop a high-pulse-energy eye-safe laser. We utilize a monolithic KTP crystal to be the optical parametric oscillator (OPO) crystal, and to form an extracavity OPO configuration. Based on the efficient Nd:YAG laser oscillator at 1064 nm carrying a pulse energy of 30 mJ, the OPO energy at 1573 nm of 13.3 mJ is obtained with a pulse width of 6 ns, corresponding to an OPO conversion efficiency of 44.3%.
{"title":"Over ten-millijoule eye-safe laser generation by extra-cavity optical parametric oscillator driven with a diode-pumped Nd:YAG/Cr4+:YAG Q-switched laser","authors":"Y. P. Huang, Y. Huang, Y. Chen","doi":"10.5220/0005254001720176","DOIUrl":"https://doi.org/10.5220/0005254001720176","url":null,"abstract":"An efficient diode-side-pumped Nd:YAG/Cr4+:YAG Q-switched laser with a convex-concave resonator is employed to develop a high-pulse-energy eye-safe laser. We utilize a monolithic KTP crystal to be the optical parametric oscillator (OPO) crystal, and to form an extracavity OPO configuration. Based on the efficient Nd:YAG laser oscillator at 1064 nm carrying a pulse energy of 30 mJ, the OPO energy at 1573 nm of 13.3 mJ is obtained with a pulse width of 6 ns, corresponding to an OPO conversion efficiency of 44.3%.","PeriodicalId":170064,"journal":{"name":"2015 International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124828402","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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