Sample interview questions: What are some common techniques for achieving tunable laser output in the ultraviolet range?
Sample answer:
Techniques for Achieving Tunable Laser Output in the Ultraviolet Range:
- Nonlinear Frequency Conversion:
- Second Harmonic Generation (SHG): Doubling the frequency of a visible or infrared laser using a nonlinear crystal, resulting in UV output.
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Sum-Frequency Generation (SFG): Combining the frequencies of multiple lasers using a nonlinear material, potentially generating UV output.
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Excimer Lasers:
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These lasers use gaseous mixtures of noble gases (e.g., Ar-F, Kr-F) that emit in the UV range when excited. They offer tunability over narrow wavelength bands.
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Dye Lasers with Frequency Doublers:
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Dye lasers can be tuned over a wide range in the visible spectrum. By using an SHG crystal, the output can be converted to UV wavelengths.
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