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High-power Yb- and Tm-doped fiber amplifiers seeded by a femtosecond Er:Fiber system

High-power Yb- and Tm-doped fiber amplifiers seeded by a femtosecond Er:Fiber system

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KUMKAR, Sören, Marcel WUNRAM, Patrick STORZ, David FEHRENBACHER, Daniele BRIDA, Alfred LEITENSTORFER, 2013. High-power Yb- and Tm-doped fiber amplifiers seeded by a femtosecond Er:Fiber system. Conference on Lasers and Electro-Optics Europe (CLEO EUROPE). Munich, Germany, May 12, 2013 - May 16, 2013. In: 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. Piscataway, New Jersey:IEEE. ISBN 978-1-4799-0594-2. Available under: doi: 10.1109/CLEOE-IQEC.2013.6801344

@inproceedings{Kumkar2013Highp-57447, title={High-power Yb- and Tm-doped fiber amplifiers seeded by a femtosecond Er:Fiber system}, year={2013}, doi={10.1109/CLEOE-IQEC.2013.6801344}, isbn={978-1-4799-0594-2}, address={Piscataway, New Jersey}, publisher={IEEE}, booktitle={2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC}, author={Kumkar, Sören and Wunram, Marcel and Storz, Patrick and Fehrenbacher, David and Brida, Daniele and Leitenstorfer, Alfred} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/57447"> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:rights>terms-of-use</dc:rights> <dc:creator>Brida, Daniele</dc:creator> <dc:contributor>Leitenstorfer, Alfred</dc:contributor> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-05-06T09:02:33Z</dc:date> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-05-06T09:02:33Z</dcterms:available> <dc:contributor>Storz, Patrick</dc:contributor> <dc:creator>Kumkar, Sören</dc:creator> <dcterms:title>High-power Yb- and Tm-doped fiber amplifiers seeded by a femtosecond Er:Fiber system</dcterms:title> <dcterms:issued>2013</dcterms:issued> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/57447"/> <dc:creator>Leitenstorfer, Alfred</dc:creator> <dc:creator>Fehrenbacher, David</dc:creator> <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/> <dc:contributor>Fehrenbacher, David</dc:contributor> <dc:contributor>Wunram, Marcel</dc:contributor> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:contributor>Kumkar, Sören</dc:contributor> <dcterms:abstract xml:lang="eng">Summary form only given. The generation of ultrafast optical pulses that are used for many applications is increasingly based on Er:fiber lasers. The inherent advantages of this technology are compactness, stability, and turn-key operation. Tm- and Yb-doped fiber systems are promising candidates for reaching microjoule pulse energies [1,2,3].We present a setup exploiting the well-established Er:fiber technology that provides a femtosecond pulse train suitable for coherent seeding of both Yb: and Tm:amplifiers. A seed source generates pulses with a wavelength centered at 1550 nm. Four parallel amplification branches each provide 8 nJ pulse energy at a repetition rate of 40 MHz. This source implements also a passive phase-locking scheme [4]. The pulses are compressed in a silicon prism pair and then coupled into a highly nonlinear fiber (HNF). This scheme allows us to generate tailor-cut spectra with components spanning from 800 to 2300 nm that can be finely tuned by material insertion in the prism sequence [5]. The solitonic part of the spectrum is centered at 1970 nm and optimized to cover the entire gain bandwidth of Tm:silica. The dispersive part of a second HNF is designed to fit the gain maximum of Yb-doped fibers at a wavelength of 1030 nm. The benefit of Er:fiber seeding has been proven experimentally by confirming the full coherence of the spectral components generated in the HNFs [6].MHz and the transform limit for the pulse duration is 110 fs. The Er:fiber system acts as seed source for the parallel Yb: and Tm:fiber amplifiers. We reduce the repetition rate to 10 MHz via electro-optic modulators. To amplify the spectrum delivered by the HNF at a center wavelength of 1030 nm, we stretch the pulses with a grating pair to a temporal duration of 340 ps. The amplification occurs in a first Yb:fiber preamplifier pumped at a wavelength of 976 nm. The energy is then boosted in a 1.5 m long Yb-doped photonic crystal fiber (PCF) amplifier stage. The PCF double cladding structure enables pumping with high-power multimode laser diodes. At a pump power of 40 W, we measured pulse energies of 2.2 μJ. The spectrum after amplification has a bandwidth of 12 nm (FWHM) centered at 1032 nm (see Fig. 1.a). Recompression of these pulses leads to a pulse duration of 185 fs (see SHG FROG characterization in Fig. 1.b). The seed for the Tm:amplifier is stretched in 30 m of single-mode fiber directly spliced to the HNF. In a monolithic and truly single-mode Tm:fiber amplifier pumped at 796 nm, we demonstrate pulse energies of 250 nJ at a repetition rate of 10 MHz [6]. Fig. 1.c shows the pulse spectrum after amplification. It is centered at a wavelength of 1950 nm with a bandwidth of 50 nm. Both amplifiers are operating in a linear regime and there are no signs of a significant influence of nonlinear effects. The combination of high-energy, sub 200-fs pump pulses together with passive carrier-envelope phase stability of ultrabroadband seed pulses for parametric amplification paves the way towards extremely nonlinear optics and attosecond technology at unprecedented repetition rates and stability.</dcterms:abstract> <dc:creator>Storz, Patrick</dc:creator> <dc:contributor>Brida, Daniele</dc:contributor> <dc:creator>Wunram, Marcel</dc:creator> <dc:language>eng</dc:language> </rdf:Description> </rdf:RDF>

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