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High average power second harmonic generation in air
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View: Figures


Image of FIG. 1.
FIG. 1.

(Top) Experimental setup for generating SH in air: Half-wave plate and Glan polarizer (P), dichroic mirror (DM), objective (O), condenser (C), CCD camera (CCD), white screen (WS), power meter (D). (Inset) Image of SH pattern for circular polarization. On top of the photography the objective's edge can be seen. (Bottom) SH vortex generated with circularly polarized pump in accordance with angular momentum conservation (Left). Two-lobe SH pattern with shifted electric fields for linearly polarized pump (Right).

Image of FIG. 2.
FIG. 2.

Spectra of the first and second harmonics.

Image of FIG. 3.
FIG. 3.

SH power as a function of the pump power. Dashed lines show fit of data with quadratic function.

Image of FIG. 4.
FIG. 4.

Plasma spot diameter dependence on pump power. (Inset) CCD images of plasma spot evolution with pump power increase. Numeric values indicate pump power delivered to the focus.

Image of FIG. 5.
FIG. 5.

SH power change when compressed HFC gas is blown at the focus spot for two pump powers. The SH increases about 20 times at 0.65 W pump power (continuous blue) and about 4 times at 2.45 W (dotted red).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High average power second harmonic generation in air