TY - GEN
T1 - Walk-off-compensated type-I and type-II SHG using twin-crystal AgGaSe2 and KTiOPO4 devices
AU - Zondy, Jean Jacques
AU - Abed, M.
AU - Khodja, S.
AU - Bonnin, C.
AU - Rainaud, B.
AU - Albrecht, Herve
AU - Lupinski, Dominique
PY - 1996/1/1
Y1 - 1996/1/1
N2 - The walkoff-compensated (WOC) twin-crystal device enables to reduce the aperture effects in critically phase-matched parametric generation. In that device, instead of using a monolithic bulk crystal of length 21 c, two identically-cut crystals of length l c are disposed in tandem such that the relative sign of the walkoff angle ρ in the first and second items are opposite, while keeping unchanged the relative sign of their non-linear effective susceptibilities through a proper orientation of their optic axes. Applied to KTiOPO 4 (KTP) for type-II (oeo) second-harmonic generation (SHG) of a color center laser, the 2 × l c twin- crystal device leads to a conversion efficiency 3.5 times higher than that of a 21c single bulk crystal. The same WOC technique has been applied successfully in the type-I (ooe) SHG of a CO 2 laser using an AgGaSe 2 (AGSE) device. The extension of the WOC method to a periodical structure composed of N twin-device stacks is considered. We report the first demonstration of the SHG efficiency enhancement of such a structure, which is made of four KTP plate optically contacted in the WOC configuration.
AB - The walkoff-compensated (WOC) twin-crystal device enables to reduce the aperture effects in critically phase-matched parametric generation. In that device, instead of using a monolithic bulk crystal of length 21 c, two identically-cut crystals of length l c are disposed in tandem such that the relative sign of the walkoff angle ρ in the first and second items are opposite, while keeping unchanged the relative sign of their non-linear effective susceptibilities through a proper orientation of their optic axes. Applied to KTiOPO 4 (KTP) for type-II (oeo) second-harmonic generation (SHG) of a color center laser, the 2 × l c twin- crystal device leads to a conversion efficiency 3.5 times higher than that of a 21c single bulk crystal. The same WOC technique has been applied successfully in the type-I (ooe) SHG of a CO 2 laser using an AgGaSe 2 (AGSE) device. The extension of the WOC method to a periodical structure composed of N twin-device stacks is considered. We report the first demonstration of the SHG efficiency enhancement of such a structure, which is made of four KTP plate optically contacted in the WOC configuration.
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M3 - Conference contribution
AN - SCOPUS:0029727216
SN - 0819420743
SN - 9780819420749
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 66
EP - 72
BT - Proceedings of SPIE - The International Society for Optical Engineering
A2 - Gupta, Mool C.
A2 - Kozlovsky, William J.
A2 - MacPherson, David C.
T2 - Nonlinear Frequency Generation and Conversion
Y2 - 29 January 1996 through 31 January 1996
ER -