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Generation of turquoise light by sum-frequency mixing of a diode-pumped solid-state laser and a laser diode in periodically poled PPKTP
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.ORCID iD: 0000-0002-2508-391X
KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-7688-1367
2004 (English)In: Optics expresss, ISSN 1094-4087, Vol. 12, 4935-4940 p.Article in journal (Refereed) Published
Abstract [en]

We report a simple and efficient method to achieve visible light by sum-frequency mixing radiation from a diode-pumped solid-state laser and a laser diode in a periodically poled KTiOPO4 crystal. Since high-power laser diodes are available at a wide range of wavelengths, it is thereby possible to obtain essentially any wavelength in the visible spectrum by appropriate choice of lasers. For demonstration we choose to construct a light source in the blue-green region. A turquoise output power of 4.0 mW was achieved.

Place, publisher, year, edition, pages
2004. Vol. 12, 4935-4940 p.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-6565DOI: 10.1364/OPEX.12.004935ISI: 000224253900031Scopus ID: 2-s2.0-9144272417OAI: oai:DiVA.org:kth-6565DiVA: diva2:11312
Note
QC 20100903 QC 20110923Available from: 2006-12-11 Created: 2006-12-11 Last updated: 2015-03-30Bibliographically approved
In thesis
1. Concepts for compact solid-state lasers in the visible and UV
Open this publication in new window or tab >>Concepts for compact solid-state lasers in the visible and UV
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In many fields, scientific or industrial, optical devices that can be tailored in terms of spectral qualities and output power depending on the application in question are attractive. Nonlinear optics in combination with powerful laser sources provide a tool to achieve essentially any wavelength in the electromagnetic spectrum, and the advancement of material technology during the last decade has opened up new possibilities in terms of realising such devices.

The main part of the thesis deals with the development of compact functional lasers based on nonlinear interaction utilising diode-pumped solid-state lasers and also laser diodes. Efficient frequency conversion into the visible and ultraviolet part of the electromagnetic spectrum has been achieved, using both Nd:YAG and Nd:YVO4 lasers as well as a semiconductor laser as the fundamental light sources. For the nonlinear conversion, periodically poled potassium titanyl phosphate (PPKTP), bismuth triborate (BiBO) and beta barium borate (BBO) have been employed.

In the search for compact and reliable light sources emitting in the visible part of the spectrum, two different approaches have been explored. First, a scheme based on sum-frequency mixing of a diode-pumped solid-state laser and a laser diode of good beam quality. The idea of this approach is to take advantage of the individual strength of each device, which would be the flexibility in terms of wavelength for the laser diode and the possibility to reach high output power from the diode-pumped solid-state laser. Second, by mixing two different solid-state lasers substantially more output power could be generated albeit at a cost of less freedom in the choice of spectral output. As these two light sources had their central wavelength at 492 nm and 593 nm, respectively, they are highly interesting in biomedical applications since they correspond to the peak absorption of several popular fluorophores.

In applications such as lithography, material synthesis and fibre grating fabrication, laser sources emitting in the deep-UV spectrum are desired. An all solid-state 236 nm laser source with 20 mW of average power have been designed and constructed, by frequency-quadrupling a passively Q-switched Nd:YAG laser lasing on a quasi-three level transition.

Also, a novel concept for miniaturising solid-state lasers has been examined. Using a heat-conductive polymer carrier, a generic approach especially suited for mass-production of functional laser devices is presented.

Finally, it has been proven that GRIN lenses can provide a very compact beam shaping solution to standard laser diodes based on the beam twisting approach. This method offers several advantages such as compactness of the beam shaping system, automated assembly in solid-state laser manufacturing due to the shape of these lenses and polarisation preservation of the laser diode output.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. xiii, 76 p.
Series
Trita-FYS, ISSN 0280-316X ; 2006:72
Keyword
nonlinear optics, frequency conversion, visible lasers, ultraviolet lasers, KTiOPO4, BiBO, BBO, quasi phase-matching, birefringent phase-matching, solid-state lasers
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4223 (URN)978-91-7178-539-8 (ISBN)
Public defence
2006-12-15, FB55, AlbaNova, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20100903Available from: 2006-12-11 Created: 2006-12-11 Last updated: 2015-03-30Bibliographically approved

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Publisher's full textScopushttp://www.opticsexpress.org/abstract.cfm?id=81322

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Pasiskevicius, ValdasLaurell, Fredrik

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