Second Harmonic Generation: Light Intensity & Efficiency

In summary, the conversation discusses the potential for doubling the frequency of a light beam using second harmonic generation with a non-linear crystal. The question arises about the necessary intensity of the light beam for efficient conversion, and whether it is possible to use sunlight as the source. The conversation also asks for references and further information on the required intensity and efficiency of conversion.
  • #1
brethg
3
0
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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  • #2


no one?
 
  • #3


can no one shed any light on this? :-)
 

What is Second Harmonic Generation?

Second Harmonic Generation (SHG) is a nonlinear optical process in which two photons of the same frequency combine in a nonlinear medium to generate a single photon with twice the frequency and half the wavelength. This process is also known as frequency doubling and is commonly used to generate higher frequency light for applications such as laser technology and microscopy.

How does Second Harmonic Generation affect light intensity?

In Second Harmonic Generation, the intensity of the generated light is proportional to the square of the input light intensity. This means that as the input light intensity increases, the intensity of the generated light will increase exponentially.

What factors influence the efficiency of Second Harmonic Generation?

The efficiency of Second Harmonic Generation is influenced by several factors, including the properties of the nonlinear medium (such as its crystal structure and size), the wavelength and polarization of the input light, and the alignment and focus of the light beam. Additionally, the temperature and quality of the optical components used can also affect the efficiency of SHG.

How can the efficiency of Second Harmonic Generation be improved?

To improve the efficiency of Second Harmonic Generation, it is important to carefully select the appropriate nonlinear medium and optimize the alignment and focus of the input light beam. Using high-quality optical components and controlling the temperature of the system can also help to increase the efficiency of SHG.

What are the applications of Second Harmonic Generation?

Second Harmonic Generation has a wide range of applications in various fields, such as laser technology, microscopy, and biophotonics. It is used to generate higher frequency light for applications such as laser printing, optical data storage, and medical imaging. SHG is also used in nonlinear optics research to study the properties of materials and to create new materials with unique optical properties.

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