Phase-matched second harmonic generation

Fig. 1. (a) Phase matched second harmonic generation (2cJ = 0.49 fiTo) at cj = 0.98 where = refractive index by ordinary rays and = by extraordinary rays, (b) Hypothetical anomalous dispersion phase matching at 850 nm in similar a crystal having a Lorent2ian absorption centered at 650... 

M. M. Fejer, G.A. Magel, D.H. Jundt, and R.L. Byer, Quasi-phase-matched second harmonic generation - tuning and tolerances, IEEE Journal of Quantum Electronics 28, 2631-2654 (1992). 

Chemistry of Anomalous-Dispersion Phase-Matched Second Harmonic Generation... 

Our recent report(1) on ADPM SHG (Anomalous-Dispersion Phase-Matched Second-Harmonic Generation) addressed the physics of ADPM, a... 

As the transition is to a particular molecular electronic manifold, we have utilized the convenient density of states representation in the expressions. We see that the rate at which the exited state is populated depends on the position of the molecule, through I 2—and also on the molecular orientation, through the matrix elements. It is this I term that produces the grating within the sample. We note here that the periodicity of the grating, determined by eI(2k2-k3 ) R = e (2k 3 )-r is exactly that required for phase-matched second-harmonic generation from the probe beam, where the signal is created in precisely the opposite direction to the harmonic pump beam. 

FIG. 11.20 Periodic self-organization for perfectly phase-matched second harmonic generation. ... 

Phase-matched second harmonic generation in single crystal polymers was first observed in 2-methyl-4-nitroaniline substituted diacetylene polymers. Subsequently, a number of other diacetylene structures... 

In this paper we report phase-matched second-harmonic generation in nonlinear optically active Langmuir-Blodgett (LB) film waveguides both by mode conversion and by use of the Cerenkov-type configuration. The experiments were done in 2-docosylamino-S-nitropyridine (DCANP) LB films (Hg.l). The synthesis, the optimum conditions for LB film transfer and the linear and nonlinear optical properties of this material have been described elsewhere [4-6]. 

J. Halbout, S. Blit, W. Donaldson, Ch.L. Tang Efficient phase-matched second harmonic generation and sum-frequency mixing in urea. IEEE J. QE-15, 1176... 

G. Nath, S. Haussuhl Large nonlinear optical coefficient and phase-matched second harmonic generation in LilOs. AppL Phys. Lett. 14, 154 (1969)... 

Waveguiding combined with x and x processes in polydiaoetylene multilayers may open a wide range of applications to optical switches and frequency multipliers in integrated optics, data storage, and memory technologies. Current research activities are focussed on amphiphilic compounds exhibiting a phase matched second harmonic generation , as for example... 

Doumuki, T., Tamada, H., and Saitoh, M., Phase-matched second-harmonic generation in a Ta20s/KTi0P04 waveguide, Appl. Phys. Lett., 65, 2519-2521 (1994). 

Fluck, D., Pliska, T., Gunter, R, Beckers, L., and Buchal, C., Phase-matched second-harmonic generation in KNbOj waveguides. Proceedings, Nonlinear Guided Waves, Cambridge, England, paper FD 19, 1996, pp. 103-105. 

Bortz, M. L., Field, S. J., Fejer, M. M., Nam, D. W., Waarts, R. G., and Welch, D. F., Noncritical quasi-phase-matched second harmonic generation in an annealed proton-exchanged LiNbOj waveguide, IEEE J. Quantum Electron., 30, 2953-2960 (1994). 

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