The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Judith M. Dawes - One of the best experts on this subject based on the ideXlab platform.
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ytterbiuM doped silica fiber lasers versatile sources for the 1 1 2 spl Mu M Region
IEEE Journal of Selected Topics in Quantum Electronics, 1995Co-Authors: Helen M. Pask, D.c. Hanna, A.c. Tropper, C.j. Mackechnie, Paul R. Barber, R J Carman, Judith M. DawesAbstract:YtterbiuM-doped silica fibers exhibit very broad absorption and eMission bands, froM /spl siM/800 nM to /spl siM/1064 nM for absorption and /spl siM/970 nM to /spl siM/1200 nM for eMission. The siMplicity of the level structure provides freedoM froM unwanted processes such as excited state absorption, Multiphonon nonradiative decay, and concentration quenching. These fiber lasers therefore offer a very efficient and convenient Means of wavelength conversion froM a wide variety of puMp lasers, including AlGaAs and InGaAs diodes and Nd:YAG lasers. Efficient operation with narrow linewidth at any wavelength in the eMission range can be conveniently achieved using fiber gratings. A wide range of application for these sources can be anticipated. In this paper, the capabilities of this versatile source are reviewed. Analytical procedures and nuMerical data are presented to enable design choices to be Made for the wide range of operating conditions. >
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YtterbiuM-doped silica fiber lasers: versatile sources for the 1-1.2 /spl Mu/M Region
IEEE Journal of Selected Topics in Quantum Electronics, 1995Co-Authors: Helen M. Pask, Robert Carman, David C. Hanna, Anne C. Tropper, C.j. Mackechnie, Paul R. Barber, Judith M. DawesAbstract:YtterbiuM-doped silica fibers exhibit very broad absorption and eMission bands, froM /spl siM/800 nM to /spl siM/1064 nM for absorption and /spl siM/970 nM to /spl siM/1200 nM for eMission. The siMplicity of the level structure provides freedoM froM unwanted processes such as excited state absorption, Multiphonon nonradiative decay, and concentration quenching. These fiber lasers therefore offer a very efficient and convenient Means of wavelength conversion froM a wide variety of puMp lasers, including AlGaAs and InGaAs diodes and Nd:YAG lasers. Efficient operation with narrow linewidth at any wavelength in the eMission range can be conveniently achieved using fiber gratings. A wide range of application for these sources can be anticipated. In this paper, the capabilities of this versatile source are reviewed. Analytical procedures and nuMerical data are presented to enable design choices to be Made for the wide range of operating conditions. >
Kirsten Fischer Lindahl - One of the best experts on this subject based on the ideXlab platform.
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Structure and expression of MHC class Ib genes of the central M Region in rat and Mouse: M4, M5, and M6
Immunogenetics, 2008Co-Authors: Doris Lambracht-washington, Yuki F. Moore, Kurt Wonigeit, Kirsten Fischer LindahlAbstract:The M Region at the teloMeric end of the Murine Major histocoMpatibility coMplex (MHC) contains class I genes that are highly conserved in rat and Mouse. We have sequenced a cosMid clone of the LEW rat strain (RT1 haplotype) containing three class I genes, RT1.M6-1, RT1.M4, and RT1.M5. The sequences of allelic genes of the BN strain (RT1n haplotype) were obtained either froM cDNAs or genoMic clones. For the coding parts of the genes few differences were found between the two RT1 haplotypes. In LEW, however, only RT1.M5 and RT1.M6 have open reading fraMes; whereas in BN all three genes were intact. In line with the findings in BN, transcription was found for all three rat genes in several tissues froM strain Sprague Dawley. Protein expression in transfectants could be deMonstrated for RT1.M6-1 using the Monoclonal antibody OX18. By sequencing of transcripts obtained by RT-PCR, a second, transcribed M6 gene, RT1.M6-2, was discovered, which Maps next to RT1.M6-1 outside of the Region covered by the cosMid. In addition, alternatively spliced forMs for RT1.M5 and RT1.M6 were detected. Of the orthologous Mouse genes, H2-M4, H2-M5, and H2-M6, only H2-M5 has an open reading fraMe. Other iMportant differences between the corresponding parts of the M Region of the two species are insertion of long LINE repeats, duplication of RT1.M6, and the inversion of RT1.M5 in the rat. This deMonstrates substantial evolutionary dynaMics in this Region despite conservation of the class I gene sequences theMselves.
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Mhc class I and non-class I gene organization in the proxiMal H2-M Region of the Mouse.
Immunogenetics, 1999Co-Authors: Elsy P. Jones, Masayasu Yoshino, Attila Kumánovics, Kirsten Fischer LindahlAbstract:A bacterial artificial chroMosoMe (BAC) contig was constructed across the proxiMal part of the H2-M Region froM the Major histocoMpatibility coMplex (Mhc) of Mouse strain 129 (H2 bc ). The contig is coMposed of 28 clones that span approxiMately 1 Megabasepair (Mb), froM H2-T1 to Mog, and contains three H2-T genes and 18 H2-M genes. We report the fine Mapping of the H2-M class I gene cluster, which includes the previously reported M4-M6, the M1 faMily, the M10 faMily, and four additional class I genes. All but two of the H2-M class I genes are conserved aMong haplotypes H2 k , H2 b , and H2 bc , and only two genes are found in polyMorphic HindIII fragMents. Six evolutionarily conserved non-class I genes were Mapped to a 180 kilobase interval in the distal part of the class I Region in Mouse, and their order Znf173-Rfb30-Tctex5-Tctex6-Tctex4-Mog was found conserved between huMan and Mouse. In this Znf173-Mog interval, three Mouse class I genes, M6, M4, and M5, which are conserved aMong haplotypes, occupy the saMe Map position as the huMan HLA-A class I cluster, which varies aMong haplotypes and is diverged in sequence froM the Mouse genes. These results further support the view that class I gene diverge and evolve independently between species.
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BAC/YAC contigs froM the H2-M Region of Mouse Chr 17 define gene order as Znf173-Tctex5-Mog-D17Tu42-M3-M2.
Immunogenetics, 1998Co-Authors: Masayasu Yoshino, Elsy P. Jones, Hong Xiao, Kirsten Fischer LindahlAbstract:A yeast artificial chroMosoMe (YAC) contig froM the C57BL/6 (H2 b ) Mouse was created froM the Major histocoMpatibility coMplex (Mhc, H2 in Mouse) class Ib subRegion, H2-M. It spans approxiMately 1.2 Megabase (Mb) pairs and unites the previous >1.5-Mb YAC contigs (Jones et al. 1995) into a single contig, which includes 21 Mhc class I genes distal to H2-T1. A bacterial artificial chroMosoMe (BAC) contig froM the 129 (H2 bc ) Mouse, spanning approxiMately 600 kilobases, was also built froM Znf173 (Afp, a gene for acid finger protein), through Tctex5 (t-coMplex testis expressed-5) and Mog (Myelin oligodendrocyte glycoprotein), to H2-M2. Twenty-four sequence-tagged site (STS) Markers were newly developed, and 35 Markers were Mapped in the YAC/BAC contigs, which define the Marker order as Cen –Znf173–Tctex5 – Mog–D17Tu42–D17Mit232–H2-M3–D17Leh525–H2-M2– Tel. The gene order of Znf173 – Tctex5 – Mog – D17Tu42 is conserved between Mouse and huMan, showing that the Middle H2-M Region corresponds to the subRegion of the huMan Mhc surrounding HLA-A.
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BAC clones and STS Markers near the distal breakpoint of the fourth t-inversion, In(17)4d, in the H2-M Region on Mouse ChroMosoMe 17
Mammalian Genome, 1998Co-Authors: Masayasu Yoshino, Elsy P. Jones, Hong Xiao, Claire Amadou, Kirsten Fischer LindahlAbstract:The H2-M Region is the Most distal part of the Mouse Major histocoMpatibility coMplex ( Mhc ) and is likely to include the distal breakpoint of the fourth t -Inversion, In(17)4d . The conserved synteny breakpoint between Mouse and huMan is located in the H2-M Region between D17Leh89 , a putative olfactory receptor gene, and Pgk2 (phosphoglycerate kinase 2). To analyze the H2-M Region, we screened a Mouse bacterial artificial chroMosoMe (BAC) library, using the D17Mit64, D17Tu49, D17Leh89 , D17Leh467 , and Pgk2 Markers. Thirty-eight BAC clones were obtained and Mapped in five clusters, and 25 sequence-tagged site (STS) Markers were newly developed. The Regions surrounding D17Tu49 and D17Leh467 are abundant in L1 repeat sequences and May, therefore, be candidates for the breakpoints of conserved synteny and t -inversion. D17Leh89 was linked to D17Mit64 by two contiguous BAC clones. The Aeg1 (acidic epididyMal glycoprotein 1) and Aeg2 genes were Mapped close to Pgk2 , on the saMe BAC clones. The genetic length between D17Leh89-D17Mit64 and Pgk2-Aeg can be estiMated as 0.5–0.7 centiMorgan (cM), and the Most distal class I gene, H2-M2 , can be placed 0.3–1.0 cM proxiMal to the t -inversion breakpoint. A recoMbinational hotspot is suggested to be located between Aeg and Tpx1 in an interspecific cross of (C57BL/6J × Mus spretus ).
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Characterization of two class I genes froM the H2-M Region: evidence for a new subfaMily
Immunogenetics, 1998Co-Authors: S. Rao Arepalli, Kirsten Fischer Lindahl, Elsy P. Jones, T. Kevin Howcroft, Irene Carlo, Chyung Ru Wang, Dinah S. Singer, Stuart RudikoffAbstract:We cloned, sequenced, and Mapped two divergent Major histocoMpatibility class Ib genes froM BALB/c Mice. M9 d and M10 d both have the potential to encode full-length class I Molecules, but transcripts were not readily detectable. M9 is 86% siMilar to M1 in its nucleotide sequence and Maps next to it on YAC clones. M9 is only 64% siMilar to M10 and 60% to H2-K k. Probes froM M10 define a new subfaMily of eight class I genes in C3H Mice; five cluster directly distal to H2-T1, and three are located between M9-1-7-8 and M6-4-5 in the H2-M Region.
Helen M. Pask - One of the best experts on this subject based on the ideXlab platform.
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ytterbiuM doped silica fiber lasers versatile sources for the 1 1 2 spl Mu M Region
IEEE Journal of Selected Topics in Quantum Electronics, 1995Co-Authors: Helen M. Pask, D.c. Hanna, A.c. Tropper, C.j. Mackechnie, Paul R. Barber, R J Carman, Judith M. DawesAbstract:YtterbiuM-doped silica fibers exhibit very broad absorption and eMission bands, froM /spl siM/800 nM to /spl siM/1064 nM for absorption and /spl siM/970 nM to /spl siM/1200 nM for eMission. The siMplicity of the level structure provides freedoM froM unwanted processes such as excited state absorption, Multiphonon nonradiative decay, and concentration quenching. These fiber lasers therefore offer a very efficient and convenient Means of wavelength conversion froM a wide variety of puMp lasers, including AlGaAs and InGaAs diodes and Nd:YAG lasers. Efficient operation with narrow linewidth at any wavelength in the eMission range can be conveniently achieved using fiber gratings. A wide range of application for these sources can be anticipated. In this paper, the capabilities of this versatile source are reviewed. Analytical procedures and nuMerical data are presented to enable design choices to be Made for the wide range of operating conditions. >
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YtterbiuM-doped silica fiber lasers: versatile sources for the 1-1.2 /spl Mu/M Region
IEEE Journal of Selected Topics in Quantum Electronics, 1995Co-Authors: Helen M. Pask, Robert Carman, David C. Hanna, Anne C. Tropper, C.j. Mackechnie, Paul R. Barber, Judith M. DawesAbstract:YtterbiuM-doped silica fibers exhibit very broad absorption and eMission bands, froM /spl siM/800 nM to /spl siM/1064 nM for absorption and /spl siM/970 nM to /spl siM/1200 nM for eMission. The siMplicity of the level structure provides freedoM froM unwanted processes such as excited state absorption, Multiphonon nonradiative decay, and concentration quenching. These fiber lasers therefore offer a very efficient and convenient Means of wavelength conversion froM a wide variety of puMp lasers, including AlGaAs and InGaAs diodes and Nd:YAG lasers. Efficient operation with narrow linewidth at any wavelength in the eMission range can be conveniently achieved using fiber gratings. A wide range of application for these sources can be anticipated. In this paper, the capabilities of this versatile source are reviewed. Analytical procedures and nuMerical data are presented to enable design choices to be Made for the wide range of operating conditions. >
Maxim V. Fedorov - One of the best experts on this subject based on the ideXlab platform.
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LuMinescence in gerMania-silica fibers in 1-2 {\Mu}M Region
Optics letters, 2017Co-Authors: N. A. Borshchevskaia, K. G. Katamadze, S. P. Kulik, S. N. Klyamkin, S.v. Chuvikov, A. A. Sysolyatin, S. V. Tsvetkov, Maxim V. FedorovAbstract:We analyze the origins of the luMinescence in gerMania-silica fibers with high gerManiuM concentration (about 30 Mol. % GeO2) in the Region 1-2 {\Mu}M with a laser puMp at the wavelength 532 nM. We show that such fibers deMonstrate the high level of luMinescence which unlikely allows the observation of photon triplets, generated in a third-order spontaneous paraMetric down-conversion process in such fibers. The only efficient approach to the luMinescence reduction is the hydrogen saturation of fiber saMples, however, even in this case the level of residual luMinescence is still too high for three-photon registration.
C.j. Mackechnie - One of the best experts on this subject based on the ideXlab platform.
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ytterbiuM doped silica fiber lasers versatile sources for the 1 1 2 spl Mu M Region
IEEE Journal of Selected Topics in Quantum Electronics, 1995Co-Authors: Helen M. Pask, D.c. Hanna, A.c. Tropper, C.j. Mackechnie, Paul R. Barber, R J Carman, Judith M. DawesAbstract:YtterbiuM-doped silica fibers exhibit very broad absorption and eMission bands, froM /spl siM/800 nM to /spl siM/1064 nM for absorption and /spl siM/970 nM to /spl siM/1200 nM for eMission. The siMplicity of the level structure provides freedoM froM unwanted processes such as excited state absorption, Multiphonon nonradiative decay, and concentration quenching. These fiber lasers therefore offer a very efficient and convenient Means of wavelength conversion froM a wide variety of puMp lasers, including AlGaAs and InGaAs diodes and Nd:YAG lasers. Efficient operation with narrow linewidth at any wavelength in the eMission range can be conveniently achieved using fiber gratings. A wide range of application for these sources can be anticipated. In this paper, the capabilities of this versatile source are reviewed. Analytical procedures and nuMerical data are presented to enable design choices to be Made for the wide range of operating conditions. >
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YtterbiuM-doped silica fiber lasers: versatile sources for the 1-1.2 /spl Mu/M Region
IEEE Journal of Selected Topics in Quantum Electronics, 1995Co-Authors: Helen M. Pask, Robert Carman, David C. Hanna, Anne C. Tropper, C.j. Mackechnie, Paul R. Barber, Judith M. DawesAbstract:YtterbiuM-doped silica fibers exhibit very broad absorption and eMission bands, froM /spl siM/800 nM to /spl siM/1064 nM for absorption and /spl siM/970 nM to /spl siM/1200 nM for eMission. The siMplicity of the level structure provides freedoM froM unwanted processes such as excited state absorption, Multiphonon nonradiative decay, and concentration quenching. These fiber lasers therefore offer a very efficient and convenient Means of wavelength conversion froM a wide variety of puMp lasers, including AlGaAs and InGaAs diodes and Nd:YAG lasers. Efficient operation with narrow linewidth at any wavelength in the eMission range can be conveniently achieved using fiber gratings. A wide range of application for these sources can be anticipated. In this paper, the capabilities of this versatile source are reviewed. Analytical procedures and nuMerical data are presented to enable design choices to be Made for the wide range of operating conditions. >
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high power ytterbiuM yb sup 3 doped fibre laser operating in the 1 12 spl Mu M Region
Electronics Letters, 1993Co-Authors: C.j. Mackechnie, D.c. Hanna, W L Barnes, J E TownsendAbstract:Results are presented for high power (>0.5W) Yb3+ fibre laser operating at a wavelength of around 1120nM puMped either by Nd:YAG (1.064µM) or Nd:YLF (1.047µM) lasers. The use of this laser as a single-wavelength puMp for a TM3+ ZBLAN upconversion fiber laser is also deMonstrated.
