Pub Date : 2003-06-22DOI: 10.1109/CLEOE.2003.1312120
A. Lagatsky, C. Leburn, C. Brown, W. Sibbett
In this presentation we report results on an investigation of laser performance of a stoichiometric laser crystal KYbW for pumping with an InGaAs diode laser around the zero-phonon line at 981 nm. The slope efficiency of 32% was realized in a quasi-cw regime. We believe that continuous-wave laser operation in KYbW with laser diode pumping could be achieved using options for a suitable cooling technique for the crystal or employing thin-disk laser designs.
{"title":"Diode-pumped lasing of stoichiometric crystal KYb(WO/sub 4/)/sub 2/","authors":"A. Lagatsky, C. Leburn, C. Brown, W. Sibbett","doi":"10.1109/CLEOE.2003.1312120","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312120","url":null,"abstract":"In this presentation we report results on an investigation of laser performance of a stoichiometric laser crystal KYbW for pumping with an InGaAs diode laser around the zero-phonon line at 981 nm. The slope efficiency of 32% was realized in a quasi-cw regime. We believe that continuous-wave laser operation in KYbW with laser diode pumping could be achieved using options for a suitable cooling technique for the crystal or employing thin-disk laser designs.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"11 1","pages":"58-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86246668","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1312153
G. Gad, H. Eichler, A. Kaminskii, H. Rhee
High-order Stokes and anti-Stokes stimulated scattering due to the known optical vibration mode and in addition at 320 cm/sup -1/ have been observed. The construction of a new highly efficient second-Stokes Raman laser indicates that it is a general method to extend the number of possible Raman laser wavelengths with large wavelength separation from the fundamental pump.
{"title":"Second-Stokes Raman lasers with large wavelength shift from 1064 to 1316 nm wavelength in PbWO/sub 4/ crystals","authors":"G. Gad, H. Eichler, A. Kaminskii, H. Rhee","doi":"10.1109/CLEOE.2003.1312153","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312153","url":null,"abstract":"High-order Stokes and anti-Stokes stimulated scattering due to the known optical vibration mode and in addition at 320 cm/sup -1/ have been observed. The construction of a new highly efficient second-Stokes Raman laser indicates that it is a general method to extend the number of possible Raman laser wavelengths with large wavelength separation from the fundamental pump.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"74 1","pages":"92-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86303472","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313804
E. Marchetti, N. Hubin, J. Brynnel, B. Delabre, R. Donaldson, E. Fedrigo, F. Franza, M. Le Louarn, J. Kolb, R. Reiss, A. Balestra, C. Cumani, J. Lizon, R. Ragazzoni, C. Arcidiacono, A. Baruffolo, E. Diolaiti, J. Farinato, E. Viard, A. Amorim, J. Lima
In this paper we present the final design and the status report of the MAD module that will be installed at one of the VLT unit telescope in Paranal to perform on-sky observations. MAD is a prototype MCAO system performing wide field of view (FoV) AO correction over 2 arcmin on the sky by using bright (m/sub v/ < 14) natural guide stars (NGS). Multiconjugate adaptive optics aims at performing wide field of view atmospheric turbulence correction using many guide stars (GSs) surrounding the observed target. The light coming from the GSs is analyzed through wavefront sensors whose signals are used to reconstruct the atmospheric turbulence at the different heights which some deformable mirrors are conjugated to. The European Southern Observatory in collaboration with external research institutes is building an instrument prototype, the MCAO demonstrator (MAD), to prove on the sky the feasibility of the MCAO technique using both reconstruction approaches in the view of the future 2nd generation of the VLT instrumentation and the 100-meters telescope OWL.
{"title":"The ESO multiconjugate adaptive optics demonstrator: a status report confirmation number: CS211512","authors":"E. Marchetti, N. Hubin, J. Brynnel, B. Delabre, R. Donaldson, E. Fedrigo, F. Franza, M. Le Louarn, J. Kolb, R. Reiss, A. Balestra, C. Cumani, J. Lizon, R. Ragazzoni, C. Arcidiacono, A. Baruffolo, E. Diolaiti, J. Farinato, E. Viard, A. Amorim, J. Lima","doi":"10.1109/CLEOE.2003.1313804","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313804","url":null,"abstract":"In this paper we present the final design and the status report of the MAD module that will be installed at one of the VLT unit telescope in Paranal to perform on-sky observations. MAD is a prototype MCAO system performing wide field of view (FoV) AO correction over 2 arcmin on the sky by using bright (m/sub v/ < 14) natural guide stars (NGS). Multiconjugate adaptive optics aims at performing wide field of view atmospheric turbulence correction using many guide stars (GSs) surrounding the observed target. The light coming from the GSs is analyzed through wavefront sensors whose signals are used to reconstruct the atmospheric turbulence at the different heights which some deformable mirrors are conjugated to. The European Southern Observatory in collaboration with external research institutes is building an instrument prototype, the MCAO demonstrator (MAD), to prove on the sky the feasibility of the MCAO technique using both reconstruction approaches in the view of the future 2nd generation of the VLT instrumentation and the 100-meters telescope OWL.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"794 1","pages":"731-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82765880","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1312185
C. Tsangaris, G. New, J. Rogel-Salazar
We propose an unstable laser resonator design consisting of a conical and a convex mirror. The intensity profile of its lowest order mode resembles a Bessel function with little inherent modulation imposed by the geometry.
{"title":"Unstable Bessel beam resonator","authors":"C. Tsangaris, G. New, J. Rogel-Salazar","doi":"10.1109/CLEOE.2003.1312185","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312185","url":null,"abstract":"We propose an unstable laser resonator design consisting of a conical and a convex mirror. The intensity profile of its lowest order mode resembles a Bessel function with little inherent modulation imposed by the geometry.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"8 6 1","pages":"124-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89060226","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313528
S. Krey, F. Peter, E. Dumitrescu, W. D. van Amstel, R. G. Klaver, E. Lous
Fast optical scanning deflectometry has been introduced for the measurement of the surface figure of optical surfaces. The measurement principle is based on physical ray tracing by means of a narrow laser beam deflected by an oscillating mirror and a large lens arranged for telecentric scanning. A new design of an instrument capable of measuring 12-inch wafers within 60 s and with a slope resolution better 1 /spl mu/rad is presented.
{"title":"Wafer topography measurement by fast optical scanning deflectometry","authors":"S. Krey, F. Peter, E. Dumitrescu, W. D. van Amstel, R. G. Klaver, E. Lous","doi":"10.1109/CLEOE.2003.1313528","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313528","url":null,"abstract":"Fast optical scanning deflectometry has been introduced for the measurement of the surface figure of optical surfaces. The measurement principle is based on physical ray tracing by means of a narrow laser beam deflected by an oscillating mirror and a large lens arranged for telecentric scanning. A new design of an instrument capable of measuring 12-inch wafers within 60 s and with a slope resolution better 1 /spl mu/rad is presented.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"12 1","pages":"465-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91523880","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313579
A. Seeds, C. Silva
In this paper an optical frequency synthesis technique using optical injection phase-locked loop is discussed. An optical frequency comb generator produces a complete set of channel frequencies is extracted from the comb spectrum using an active filtering arrangement, based on the combined use of injection locking and phase locking in an optical injection phase lock loop (OIPLL). This approach eliminates the wide bandwidth, short (<1 ns) loop propagation delay design constraints of conventional optical phase lock loops for use with non line-narrowed semiconductor lasers.
{"title":"Optical frequency synthesis for high spectral efficiency WDM transmission","authors":"A. Seeds, C. Silva","doi":"10.1109/CLEOE.2003.1313579","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313579","url":null,"abstract":"In this paper an optical frequency synthesis technique using optical injection phase-locked loop is discussed. An optical frequency comb generator produces a complete set of channel frequencies is extracted from the comb spectrum using an active filtering arrangement, based on the combined use of injection locking and phase locking in an optical injection phase lock loop (OIPLL). This approach eliminates the wide bandwidth, short (<1 ns) loop propagation delay design constraints of conventional optical phase lock loops for use with non line-narrowed semiconductor lasers.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"23 11","pages":"517-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91441890","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313658
L. Ponce, T. Flores, J. L. Pena, M. Hernández
Our work concern is to adequately mark products in the cigars industry using a laser engraver. The work show the possibility of marking flexible and delicate material without destroying the item itself. In this method, a marking image is accomplished with two axes high speed system that direct the laser energy across the target surface. The lens assembly focuses the laser energy to achieve the highest power density on the work surface while maintaining the focused spot travel on a flat plane. The laser can be regulated to different intensities and/or translation speeds during the marking process to achieve different levels of contrast within a particular design.
{"title":"Laser modification of tobacco leaves","authors":"L. Ponce, T. Flores, J. L. Pena, M. Hernández","doi":"10.1109/CLEOE.2003.1313658","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313658","url":null,"abstract":"Our work concern is to adequately mark products in the cigars industry using a laser engraver. The work show the possibility of marking flexible and delicate material without destroying the item itself. In this method, a marking image is accomplished with two axes high speed system that direct the laser energy across the target surface. The lens assembly focuses the laser energy to achieve the highest power density on the work surface while maintaining the focused spot travel on a flat plane. The laser can be regulated to different intensities and/or translation speeds during the marking process to achieve different levels of contrast within a particular design.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"140 1","pages":"596-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83027728","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313666
J. Burghoff, M. Will, S. Nolte, A. Tunnermann
We report on a new technique allowing for the fabrication of waveguides in phosphate glasses by use of a multiple-focus femtosecond laser setup.
我们报道了一种利用多焦点飞秒激光装置在磷酸盐玻璃中制造波导的新技术。
{"title":"Femtosecond waveguide writing in phosphate glasses using a bifocal setup","authors":"J. Burghoff, M. Will, S. Nolte, A. Tunnermann","doi":"10.1109/CLEOE.2003.1313666","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313666","url":null,"abstract":"We report on a new technique allowing for the fabrication of waveguides in phosphate glasses by use of a multiple-focus femtosecond laser setup.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"34 1","pages":"604-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83135620","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313471
D. Yuan, M. Duan, Dong Xu, M. Lv
Transparent glass-ceramics containing zinc-aluminum spinel (Zn.41204) nanocrystals doped with tetrahedrally coordinated Co2+ ions were obtained by the sol-gel method. The gels of composition Si02-Al203-ZnO-CoO were prepared at room temperature and heat-treated at temperature ranging 80O-95O0C. When the gel samples were heated up to 900"C, ZnAlzO4 nanocrystals were precipitated. Co2+ ions were located in tetrahedral sites in Zn.41204 nanocrystals. X-ray diffraction analysis shows that the crystallite sizes of ZnAlzO4 crystal become large with the heat-treatment temperature and time, and the crystallite diameter is in the range of 10-15nm. After heat treatment at 900-950°C for 5hs or 12hs, new broad absorption bands centered at 1400nm clearly appeared in the NIR regions and the bands are attributed to the Co2+ ions in the znAlzo4 crystals formed in the ZAS glass. This absorption bands near IR region clearly indicated that the ZnAl204 nanocrystals were formed and the CO' ions are located in the tetrahedral sites of the spinel-structured Zn.41~04 crystals. The presence of Co2+ ions located in different crystalline and glassy sites in ZAS glass-ceramic leads to the fine structure of the luminescence bands. We assign the main peak at 994.8nm to 2E(2G) + 4T2(4F) of Co2+ occupying crystalline sites. The influence of heat-treatment temperature on the luminescence spectra demonstrates the importance of energy-transfer process. The crystal field parameter D, of 423cm-' and the Racah parameters B of 773cm-' and C of 3478.5cm-l were calculated for tetrahedral CO" ions. This glass-ceramic system has potential as a laser material in the visible and NIR regions.
{"title":"Spectroscopic properties of Co/sup 2+/: ZnAl/sub 2/O/sub 4/ nanocrystals in sol-gel derived glass-ceramics","authors":"D. Yuan, M. Duan, Dong Xu, M. Lv","doi":"10.1109/CLEOE.2003.1313471","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313471","url":null,"abstract":"Transparent glass-ceramics containing zinc-aluminum spinel (Zn.41204) nanocrystals doped with tetrahedrally coordinated Co2+ ions were obtained by the sol-gel method. The gels of composition Si02-Al203-ZnO-CoO were prepared at room temperature and heat-treated at temperature ranging 80O-95O0C. When the gel samples were heated up to 900\"C, ZnAlzO4 nanocrystals were precipitated. Co2+ ions were located in tetrahedral sites in Zn.41204 nanocrystals. X-ray diffraction analysis shows that the crystallite sizes of ZnAlzO4 crystal become large with the heat-treatment temperature and time, and the crystallite diameter is in the range of 10-15nm. After heat treatment at 900-950°C for 5hs or 12hs, new broad absorption bands centered at 1400nm clearly appeared in the NIR regions and the bands are attributed to the Co2+ ions in the znAlzo4 crystals formed in the ZAS glass. This absorption bands near IR region clearly indicated that the ZnAl204 nanocrystals were formed and the CO' ions are located in the tetrahedral sites of the spinel-structured Zn.41~04 crystals. The presence of Co2+ ions located in different crystalline and glassy sites in ZAS glass-ceramic leads to the fine structure of the luminescence bands. We assign the main peak at 994.8nm to 2E(2G) + 4T2(4F) of Co2+ occupying crystalline sites. The influence of heat-treatment temperature on the luminescence spectra demonstrates the importance of energy-transfer process. The crystal field parameter D, of 423cm-' and the Racah parameters B of 773cm-' and C of 3478.5cm-l were calculated for tetrahedral CO\" ions. This glass-ceramic system has potential as a laser material in the visible and NIR regions.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"1 1","pages":"408-408"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80737696","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 : 2003-06-22DOI: 10.1109/CLEOE.2003.1313757
R. Iliew, C. Etrich, F. Lederer
In our paper we will predict the bending performance of line defect waveguides from the behavior of the single defect for different geometries and compare with finite-difference time-domain (FDTD) calculations. We will explore the reliability of quantitative predictions based on a coupled-defect waveguide (CDW) description for different geometries.
{"title":"Simple design of high-transmission bends in photonic crystals","authors":"R. Iliew, C. Etrich, F. Lederer","doi":"10.1109/CLEOE.2003.1313757","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313757","url":null,"abstract":"In our paper we will predict the bending performance of line defect waveguides from the behavior of the single defect for different geometries and compare with finite-difference time-domain (FDTD) calculations. We will explore the reliability of quantitative predictions based on a coupled-defect waveguide (CDW) description for different geometries.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"80 1","pages":"692-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83834235","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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