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Efficient all-diode-pumped double stage femtosecond optical parametric chirped pulse amplification at 1-kHz with periodically poled KTiOPO4
Max Born-Inst. Nonlinear Opt./U.S..
Max Born-Inst. Nonlinear Opt./U.S..
Dept. of Molec. Sci. and Technology, Ajou University.
KTH, Superseded Departments, Physics.ORCID iD: 0000-0002-2508-391X
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2003 (English)In: Japanese Journal of Applied Physics, ISSN 0021-4922, E-ISSN 1347-4065, Vol. 42, no 11A, L1327-L1329 p.Article in journal (Refereed) Published
Abstract [en]

A practical efficient optical parametric chirped pulse amplification is demonstrated with periodically poled KTiOPO4. It provides a compact solution to amplify stretched pulses to the 100 muJ level (signal + idler) at 1 kHz. The amplified signal pulses near 1.57 mum are recompressed to 270 fs.

Place, publisher, year, edition, pages
2003. Vol. 42, no 11A, L1327-L1329 p.
Keyword [en]
femtosecond pulses, chirped pulses, optical parametric amplification, pulse compression, periodically poled KTP, generation
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-22998DOI: 10.1143/jjap.42.l1327ISI: 000186948200012OAI: oai:DiVA.org:kth-22998DiVA: diva2:341696
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Optical parametric amplification with periodically poled KTiOPO4
Open this publication in new window or tab >>Optical parametric amplification with periodically poled KTiOPO4
2005 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

This thesis explores the use of engineered nonlinear crystals from the KTiOPO4 (KTP) family as the gain material in optical parametric amplifiers (OPAs), with the aim to achieve more knowledge about the benefits and limitations of these devices. The work aims further at extending the possible applications of OPAs by constructing and investigating several efficient and well performing amplifiers.

An OPA consists of a strong pump source, which transfers its energy to a weak seed beam while propagating through a nonlinear crystal. The crystals employed in this work are members of the KTP family, which are attractive due to their large nonlinear coefficients, high resistance to damage and wide transparency range. The flexibility of OPAs with respect to different wavelength regions and pulse regimes was examined by employing various dissimilar seed and pump sources.

The possibility to adapt an OPA to a specific pump and seed wavelength and achieve efficient energy conversion between the beams, originates from quasi-phasematching, which is achieved in periodically poled (PP) nonlinear crystals. Quasi-phasematched samples can be obtained by changing the position of certain atoms in a ferroelectric crystal and thereby reversing the spontaneous polarisation.

In this thesis several material properties of PP crystals from the KTP family were examined. The wavelength and temperature dispersion of the refractive index were determined for PP RbTiOPO4, which is essential for future use of this material. Another experiment helped to increase the insight into the volumes close to domain walls in PP crystals

Further, several OPAs were built and their ability to efficiently amplify the seed beam without changing its spectral or spatial properties was studied. Small signal gains of up to 55 dB and conversion efficiencies of more than 35 % were achieved for single pass arrangements employing 8 mm long PPKTP crystals. Apart from constructing three setups, which generated powerful nanosecond, picosecond and femtosecond pulses, the possibility to amplify broadband signals was investigated. An increase of the OPA bandwidth by a factor of approximately three was achieved in a noncollinear configuration.

Place, publisher, year, edition, pages
Stockholm: KTH, 2005. x, 75 p.
Series
Trita-FYS, ISSN 0280-316X ; 2005:62
Keyword
nonlinear optics, optical parametric amplification, optical parametric generation, optical parametric oscillation
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-531 (URN)91-7178-201-X (ISBN)
Public defence
2005-12-09, Sal FD5, AlbaNova, Roslagstullsbacken 21, Stockholm, 10:15
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Supervisors
Note
QC 20101013Available from: 2005-12-02 Created: 2005-12-02 Last updated: 2010-10-13Bibliographically approved

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Pasiskevicius, ValdasLaurell, Fredrik

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