Generation of green second harmonic with 60% conversion efficiency from a Q-switched microchip laser in MgO:PPLN crystal

2012 ◽  
Vol 9 (5) ◽  
pp. 355-358 ◽  
Author(s):  
H Zhao ◽  
K Sukhoy ◽  
I T Lima, Jr. ◽  
A Major
Keyword(s):  
Conversion Efficiency ◽  
Second Harmonic ◽  
Microchip Laser

Second harmonic polarization and conversion efficiency in laser produced sparks

1989 ◽  
Vol 70 (1) ◽  
pp. 38-43 ◽  
Author(s):  
D. Batani ◽  
F. Bianconi ◽  
A. Giulietti ◽  
D. Giulietti ◽  
L. Nocera
Keyword(s):  
Conversion Efficiency ◽  
Second Harmonic

The Growth of Organic Single Crystals in Glass Capillaries for Second Harmonic Generation

1989 ◽  
Vol 152 ◽  
Author(s):  
Geoffrey E. Holdcroft ◽  
P. L. Dunn ◽  
J. D. Rush
Keyword(s):  
Refractive Index ◽  
Second Harmonic Generation ◽  
Single Crystals ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
Average Power ◽  
Single Mode ◽  
Glass Capillary ◽  
Fibre Direction

ABSTRACTThe growth and characterisation of a number of organic single crystals, e.g. benzil, 2–methyl–4– nitroaniline and 2–N,N–dimethylamino–5–nitroacetanilide, in silica capillary has become fairly well established over recent years. [1–6 ] However the growth of these same compounds in glass capillary with a much higher refractive index than silica has received little interest. Crystal cored fibres, ccf's, in which there is a close match of the refractive index of the cladding to that of the core allows the possibility of fabricating single mode waveguides with useful dimensions for crystal growth. There is a better overlap integral between phase matched fundamental and second harmonic modes in a low moded structure than in a structure with more allowable modes and thus a rise in the conversion efficiency can be expected if the correct dimensions of waveguide are chosen. If a ccf of high conversion efficiency, 10% at 0.1 mW average power, could be made then the promise of fabricating an organic optical nonlinear device, e.g. parametric amplifier, might be realised. In this paper we will describe how the growth method adopted for silica clad organic crystals has been adapted for their growth in a range of Schott glasses which are better matched in refractive index, RI, than silica to the organic material. The linear and nonlinear optical properties of these crystal cored fibres will be given in terms of; the orientation of the crystal axes with respect to the fibre direction; the sideways scattering characteristics from defects; the throughput of the fundamental beam; the polarisation states of both the fundamental and the second harmonic outputs; and the overall efficiency of second harmonic generation.

ENHANCING CONVERSION EFFICIENCY IN THE SECOND-ORDER NONLINEAR OPTICAL PHENOMENA

2004 ◽  
Vol 13 (03n04) ◽  
pp. 445-449
Author(s):  
JONGBAE KIM ◽  
JUNG JIN JU ◽  
MIN-SU KIM
Keyword(s):  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Second Order ◽  
Phase Matching ◽  
Quasi Phase Matching ◽  
Optical Phenomena ◽  
Nonlinear Optical Phenomena ◽  
Second Order Nonlinearity

The distributions of electric field and the induced second-order nonlinearity are discussed in a poling scheme where the width of a periodic electrode is shorter than the conventional coherent length. The theoretical aspects of quasi-phase matching for a subsequent experiment in second harmonic generation are analyzed. The present analysis consistently explains that the conversion efficiency can be enhanced if the electrode width is shortened, and maximized if the electrode width is optimized.

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