know what to expect. Figure 15 illustrated the prediction of the phase matching as the temperature is varied. Figure 15. Normalized prediction of the phase matching curve In Figure 15, we obtained that the maximum power intensity will be obtained at 35°C. In order to measure the phase matching curve, we are going to use a photon detector and an oscilloscope to measure the power of the green light. As we changed the temperature by small steps, we recorded the voltages for the different temperatures. Then, we plotted voltage versus temperature, and we obtained a temperature of 33°C for the maximum voltage as shown in Figure 16. Our measurements of the phase matching curve agrees with our prediction. Figure 16. Obtained Phase Matching Curve at an incident infrared power of 15.33mW After characterizing the phase take a look at the conversion mismatch, let’s efficiency of our second harmonic generator. The conversion efficiency will be given by This will meaning that increasing the power of the incident infrared light will result in an increase in the power of the generated green light. We measured the power of the incident infrared and the power of the green light, and we found a conversion efficiency of 27% at an incident power of 100mW. Since the conversion efficiency increases with increase of the power, we expected to obtain higher conversion efficiency. In Figure 16, we measured the power of the green light from three different incident infrared powers. We
know what to expect. Figure 15 illustrated the prediction of the phase matching as the temperature is varied. Figure 15. Normalized prediction of the phase matching curve In Figure 15, we obtained that the maximum power intensity will be obtained at 35°C. In order to measure the phase matching curve, we are going to use a photon detector and an oscilloscope to measure the power of the green light. As we changed the temperature by small steps, we recorded the voltages for the different temperatures. Then, we plotted voltage versus temperature, and we obtained a temperature of 33°C for the maximum voltage as shown in Figure 16. Our measurements of the phase matching curve agrees with our prediction. Figure 16. Obtained Phase Matching Curve at an incident infrared power of 15.33mW After characterizing the phase mismatch, let’s take a look at the conversion efficiency of our second harmonic generator. The conversion efficiency will be given by This will meaning that increasing the power of the incident infrared light will result in an increase in the power of the generated green light. We measured the power of the incident infrared and the power of the green light, and we found a conversion efficiency of 27% at an incident power of 100mW. Since the conversion efficiency increases with increase of the power, we expected to obtain higher conversion efficiency. In Figure 16, we measured the power of the green light from three different incident infrared powers. We
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