Second Harmonic Generation: Light Intensity & Efficiency

AI Thread Summary
Second harmonic generation (SHG) can effectively double the frequency of light by using a non-linear crystal, but achieving efficient conversion requires a specific intensity of the light beam. The intensity needed for SHG typically ranges from several hundred megawatts per square centimeter to gigawatts per square centimeter, depending on the crystal and setup. Collecting sunlight and using a prism to convert infrared light before passing it through a non-linear crystal is theoretically feasible, but practical efficiency may vary significantly. The efficiency of conversion in SHG can range from a few percent to over 50%, influenced by factors like crystal quality and alignment. Understanding these parameters is crucial for optimizing the process and achieving desired results.
brethg
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OK so i know it is possible to double the frequency of a light beam by using second harmonic generation by passing the beam through a non-linear crystal; however i am unclear as to the required intensity of light beam that is needed to achieve efficient conversation. Would it be possible to collect (a lot of) sunlight, pass it through a prism, then pass the resulting infra red light through a non-linear crystal to convert it to green light?

Also if possible: What would the required intensity be? and what would the efficiency of conversion be?

If possible please supply references
 
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can no one shed any light on this? :-)
 

Thread 'Why measure the speed of light in one direction?'

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