Pub Date : 2003-06-22DOI: 10.1109/CLEOE.2003.1312088
Y. Urata, S. Wada
In this study, a Tm:GdVO/sub 4/ crystal grown by the Czochralski (CZ) technique was investigated. We pumped the crystal with an 808 nm LD and obtained a slope efficiency of 12.2 %, the maximum value reported for LD-pumped Tm:GdVO/sub 4/.
{"title":"Tm-doped GdVO/sub 4/ laser longitudinally pumped by 808 nm laser diode","authors":"Y. Urata, S. Wada","doi":"10.1109/CLEOE.2003.1312088","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312088","url":null,"abstract":"In this study, a Tm:GdVO/sub 4/ crystal grown by the Czochralski (CZ) technique was investigated. We pumped the crystal with an 808 nm LD and obtained a slope efficiency of 12.2 %, the maximum value reported for LD-pumped Tm:GdVO/sub 4/.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"24 1","pages":"26-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89894426","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.2003.1313624
J. Hu, H. Tsai
The objective of this paper is to establish mathematical models and the associated numerical techniques to calculate the transient heat transfer and fluid flow in the melt pool, and to understand the mechanisms leading to the oval shape of the melt pool during dual beam laser welding. By combining several Nd:Yag lasers one can increase the total output power to achieve deep penetration.
{"title":"Modeling the transport phenomena during dual beam laser welding process","authors":"J. Hu, H. Tsai","doi":"10.1109/CLEOE.2003.1313624","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313624","url":null,"abstract":"The objective of this paper is to establish mathematical models and the associated numerical techniques to calculate the transient heat transfer and fluid flow in the melt pool, and to understand the mechanisms leading to the oval shape of the melt pool during dual beam laser welding. By combining several Nd:Yag lasers one can increase the total output power to achieve deep penetration.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"3 1","pages":"562-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87193379","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.2003.1312288
B. Aneeshkumar, P. Gopinath, P. Radhakrishnan, V. Nampoori, C. Vallabhan, J. Thomas
In this work we present the nanosecond optical limiting of two rare earth metallo-diphthalocyanines, namely Sm(Pc)/sub 2/ and Eu(Pc)/sub 2/ in a co-polymer matrix of methyl methacrylate and methyl-2-cyanoacrylate. We have used 9 nanosecond laser pulses at 532 nm from a frequency doubled Nd:YAG laser for the optical limiting measurements. It is found that the presence of metallo-phthalocyanines in the co-polymer matrix reduces its damage threshold.
{"title":"Metallo-diphthalocyanine embedded polymer host for nanosecond optical limiting","authors":"B. Aneeshkumar, P. Gopinath, P. Radhakrishnan, V. Nampoori, C. Vallabhan, J. Thomas","doi":"10.1109/CLEOE.2003.1312288","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312288","url":null,"abstract":"In this work we present the nanosecond optical limiting of two rare earth metallo-diphthalocyanines, namely Sm(Pc)/sub 2/ and Eu(Pc)/sub 2/ in a co-polymer matrix of methyl methacrylate and methyl-2-cyanoacrylate. We have used 9 nanosecond laser pulses at 532 nm from a frequency doubled Nd:YAG laser for the optical limiting measurements. It is found that the presence of metallo-phthalocyanines in the co-polymer matrix reduces its damage threshold.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"29 1","pages":"227-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78087083","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.2003.1312303
A. Desormeaux, C. Drag, M. Lefèbvre, E. Rosencher
A compact pulsed single-longitudinal-mode optical parametric oscillator, based on an entangled cavity design, has been fully characterized and simulated. A very good agreement is obtained between performances and calculations.
{"title":"Mid-infrared semimonolithic doubly-resonant optical parametric oscillator: experiment and calculation","authors":"A. Desormeaux, C. Drag, M. Lefèbvre, E. Rosencher","doi":"10.1109/CLEOE.2003.1312303","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312303","url":null,"abstract":"A compact pulsed single-longitudinal-mode optical parametric oscillator, based on an entangled cavity design, has been fully characterized and simulated. A very good agreement is obtained between performances and calculations.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"33 1-2 1","pages":"242-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78205511","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.2003.1313534
M. Sjoholm, P. Weibring, H. Edner, S. Svanberg
Field measurements of mercury emissions has been performed by using a mobile lidar system. In this system an Nd:YAG-pumped OPO (Optical Parametric Oscillator) laser system is employed to generate a narrow band (better than 0.2 cm/sup -1/) UV beam at the mercury resonance absorption line at 253.65 nm. An inter-comparison of the lidar system and two different point monitoring systems has been performed showing excellent agreement between the instruments.
{"title":"Optical parametric oscillator based lidar system applied to atomic mercury monitoring","authors":"M. Sjoholm, P. Weibring, H. Edner, S. Svanberg","doi":"10.1109/CLEOE.2003.1313534","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313534","url":null,"abstract":"Field measurements of mercury emissions has been performed by using a mobile lidar system. In this system an Nd:YAG-pumped OPO (Optical Parametric Oscillator) laser system is employed to generate a narrow band (better than 0.2 cm/sup -1/) UV beam at the mercury resonance absorption line at 253.65 nm. An inter-comparison of the lidar system and two different point monitoring systems has been performed showing excellent agreement between the instruments.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"44 1","pages":"471-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78399537","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.2003.1312219
V. Malyarchuk, J. Tomm, C. Lienau, M. Behringer, J. Luft
Monolithically stacked high-power laser structures, i.e. device structures that include two or more nominally identical waveguide segments separated by a specially designed tunnel junction, are designed as high-brightness coherent radiation source predominantly for pulsed operation applications. Additional technological advantages are related to reduced operation currents that need to be provided by the power supply. Such so-called Nanostack/spl reg/ structures are investigated by near-field scanning optical microscopy (NSOM). This method provides straightforward and separate access to the properties of both optically active segments. Device emission, namely electroluminescence (EL) and lasing, as well as photoluminescence (PL) and photocurrent (PC) data are recorded separately from both device segments with ultra-high spatial resolution.
{"title":"Optical spectroscopy of individual segments of interband cascade diode laser Nanostacks/spl reg/","authors":"V. Malyarchuk, J. Tomm, C. Lienau, M. Behringer, J. Luft","doi":"10.1109/CLEOE.2003.1312219","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312219","url":null,"abstract":"Monolithically stacked high-power laser structures, i.e. device structures that include two or more nominally identical waveguide segments separated by a specially designed tunnel junction, are designed as high-brightness coherent radiation source predominantly for pulsed operation applications. Additional technological advantages are related to reduced operation currents that need to be provided by the power supply. Such so-called Nanostack/spl reg/ structures are investigated by near-field scanning optical microscopy (NSOM). This method provides straightforward and separate access to the properties of both optically active segments. Device emission, namely electroluminescence (EL) and lasing, as well as photoluminescence (PL) and photocurrent (PC) data are recorded separately from both device segments with ultra-high spatial resolution.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"18 1","pages":"158-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75072650","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.2003.1313482
L. Schares, R. Scotto, L. Occhi, G. Guekos
{"title":"Spectrally resolved chirp measurement of 40 GHz pulses from mode-locked fiber ring laser","authors":"L. Schares, R. Scotto, L. Occhi, G. Guekos","doi":"10.1109/CLEOE.2003.1313482","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1313482","url":null,"abstract":"","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"9 1","pages":"419-419"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75338789","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.2003.1312079
A. Lagatsky, C. Leburn, C. Brown, W. Sibbett, A. Malyarevich, V. G. Savitski, K. Yumashev, E.L. Raaben, A. Zhilin
In this presentation we report results when PbS QD-doped glass has been implemented as a saturable absorber for the passive mode-locking of a cw Cr:YAG laser. The tuning range covered optical communication wavelengths around 1500 nm.
{"title":"PbS quantum-dot-doped glass as saturable absorber for passive mode-locking of a Cr/sup 4+/:YAG laser","authors":"A. Lagatsky, C. Leburn, C. Brown, W. Sibbett, A. Malyarevich, V. G. Savitski, K. Yumashev, E.L. Raaben, A. Zhilin","doi":"10.1109/CLEOE.2003.1312079","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312079","url":null,"abstract":"In this presentation we report results when PbS QD-doped glass has been implemented as a saturable absorber for the passive mode-locking of a cw Cr:YAG laser. The tuning range covered optical communication wavelengths around 1500 nm.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"15 1","pages":"16-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78012494","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.2003.1312151
J. Sarnecki, K. Kopczyński, J. Skwarcz, Z. Mierczyk, J. Młyńczak
This article deals with the investigation of a thin saturable absorber layer of Co/sup 2+/:YAG deposited directly on the active Er,Yb:YAG substrate, by means of LPE technique. Such epitaxial structure is designed to fabricate Q-switched microchip laser operating at 1530 nm. The Co/sup 2+/:YAG layers were grown from a supercooled molten garnet-flux (PbO-B/sub 2/O/sub 3/) high temperature solution using a standard isothermal LPE dipping technique.
{"title":"The epitaxial Co/sup 2+/:YAG layers for passively Q-switched 1.3 /spl mu/m-1.5 /spl mu/m microlasers","authors":"J. Sarnecki, K. Kopczyński, J. Skwarcz, Z. Mierczyk, J. Młyńczak","doi":"10.1109/CLEOE.2003.1312151","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312151","url":null,"abstract":"This article deals with the investigation of a thin saturable absorber layer of Co/sup 2+/:YAG deposited directly on the active Er,Yb:YAG substrate, by means of LPE technique. Such epitaxial structure is designed to fabricate Q-switched microchip laser operating at 1530 nm. The Co/sup 2+/:YAG layers were grown from a supercooled molten garnet-flux (PbO-B/sub 2/O/sub 3/) high temperature solution using a standard isothermal LPE dipping technique.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"48 1","pages":"90-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76258303","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.2003.1312091
A. Agnesi, A. Guandalini, A. Lucca, G. Reali
We reported a detailed investigation of a low-power diode-pumped Nd:BaY/sub 2/F/sub 8/. Here we summarize the results of a nearly 10-fold power-scaled Nd:BaY/sub 2/F/sub 8/ pumped by a 12-W fiber-coupled diode array. In conclusions, Nd:BaY/sub 2/F/sub 8/ seems a promising material for high-power diode-pumped lasers, specially for applications requiring thermally-insensitive resonator performances, such as cw intracavity doubling, where thermal diffractive losses must be also carefully controlled.
{"title":"Medium-power diode-pumped operation of Nd:BaY/sub 2/F/sub 8/","authors":"A. Agnesi, A. Guandalini, A. Lucca, G. Reali","doi":"10.1109/CLEOE.2003.1312091","DOIUrl":"https://doi.org/10.1109/CLEOE.2003.1312091","url":null,"abstract":"We reported a detailed investigation of a low-power diode-pumped Nd:BaY/sub 2/F/sub 8/. Here we summarize the results of a nearly 10-fold power-scaled Nd:BaY/sub 2/F/sub 8/ pumped by a 12-W fiber-coupled diode array. In conclusions, Nd:BaY/sub 2/F/sub 8/ seems a promising material for high-power diode-pumped lasers, specially for applications requiring thermally-insensitive resonator performances, such as cw intracavity doubling, where thermal diffractive losses must be also carefully controlled.","PeriodicalId":6370,"journal":{"name":"2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666)","volume":"79 1","pages":"29-"},"PeriodicalIF":0.0,"publicationDate":"2003-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75611057","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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