266nm (Nd:YAG 4th Harmonic)

266nm light falls within the ultraviolet (UV) spectrum. Specifically, it lies in the deep UV range, which is characterized by wavelengths shorter than 280nm.

Here are some key characteristics of 266nm light:

  • High energy: Deep UV light has higher energy than other parts of the UV spectrum, making it more capable of interacting with molecules at a deeper level.
  • Strong absorption: Many materials, including biological molecules and some gases, strongly absorb 266nm light. This property is used in various applications, such as sterilization and spectroscopy.
  • Potential for damage: Exposure to 266nm light can cause damage to DNA and other biological molecules, leading to cell death. Therefore, it is important to handle this type of light with care and use appropriate protective measures.

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  • Sources for 266nm Light

    Nd:YAG Laser: The initial source is a Nd:YAG laser, emitting light at a wavelength of 1064nm.

    First Harmonic Generation (SHG): The 1064nm light is frequency-doubled to 532nm using lithium iodate.

    Second Harmonic Generation (SHG): The 532nm light is then frequency-doubled again to 266nm using ammonium dihydrogen phosphate (ADP).

    This multi-stage frequency doubling process allows for the generation of high-power, high-repetition-rate coherent ultraviolet light at 266nm.

  • Application of 266nm Light

    Laser ablation: The high energy of 266nm light can be used to remove material from surfaces with precision.

    Spectroscopy: The strong absorption of 266nm light by certain molecules can be used to identify and quantify their presence.

    Sterilization: The ability of 266nm light to damage DNA can be used to sterilize surfaces and materials.

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