DocumentCode :
2865879
Title :
Improved SHG phase matching response for focused Gaussian beams in Gouy compensated quasi-phase-matched structures
Author :
Major, Huw E. ; Gates, James C. ; Gawith, Corin B.E. ; Smith, Peter G R
Author_Institution :
Optoelectron. Res. Centre, Univ. of Southampton, Southampton, UK
fYear :
2009
fDate :
14-19 June 2009
Firstpage :
1
Lastpage :
1
Abstract :
Nonlinear interactions such as second harmonic generation and sum and difference frequency generation are routinely used for the generation of laser wavelengths. With high power lasers it is necessary to use bulk crystals and tight beam focusing to achieve the maximum conversion efficiency. The use of Quasi- phase-matched (QPM) materials such as PPLN and PPKTP are now routinely reported; however, in this paper, a simple linear QPM crystal does not fully the conversion response. The theoretical and experimental results shows that by careful control of the crystal design it is possible to fully compensate for the phase errors associated with the focusing induced Gouy shift. However, this optimisation is only valid for linearly invariant materials, which are unable to compensate fully for the Gouy phase inherent to focused interactions.
Keywords :
compensation; laser beams; optical focusing; optical harmonic generation; optical phase matching; Gouy compensated quasiphase-matched structure; PPKTP; PPLN; SHG phase matching response; bulk crystals; conversion response optimization; difference frequency generation; focused Gaussian beams; focusing induced Gouy shift; laser wavelength generation; linearly invariant materials; maximum conversion efficiency; nonlinear interactions; phase error compensation; second harmonic generation; simple linear QPM crystal; sum frequency generation; tight beam focusing; Frequency conversion; Laser beams; Laser tuning; Measurement standards; Optical harmonic generation; Optical materials; Optimized production technology; Power lasers; Temperature distribution; Temperature measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
Type :
conf
DOI :
10.1109/CLEOE-EQEC.2009.5196520
Filename :
5196520
Link To Document :
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