Which of the following three types of laser can be used to weld 316L stainless steel: continuous CO2 laser of 10.6 µm wavelength, Nd:YAG ms laser of 0.532 µm wavelength, and Ti:sapphire fs laser of 775 nm wavelength? Give your reasons.
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The three lasers are: \begin{itemize} \item Continuous CO2 laser (10.6 µm wavelength) \item Nd:YAG ms laser (0.532 µm wavelength) \item Ti:sapphire fs laser (775 nm wavelength) \end{itemize} Show more…
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Lasers have useful medical applications because their light is directional (permitting tight focus of the laser beam for precise cutting), monochromatic, and intense. Carbon dioxide lasers, emitting at a wavelength of 1.06 x 10^4 nm, are typically used in surgery. a. What are the frequency and energy (in kilojoules per mole) of a photon from a carbon dioxide laser? Frequency: Hz Energy: kJ/mol The reason carbon dioxide lasers are so effective for use in surgery is that their wavelength is λ = 1.06 x 10^4 nm = 1.06 x 10^-5 m. This radiation is in the region of the spectrum, and water in the skin readily absorbs radiation of this wavelength, causing local heating and cutting.
Sri K.
BIO Laser Surgery. Using a mixture of $\mathrm{CO}_{2}, \mathrm{~N}_{2},$ and sometimes He, $\mathrm{CO}_{2}$ lasers emit a wavelength of $10.6 \mu \mathrm{m}$. At power outputs of $0.100 \mathrm{~kW},$ such lasers are used for surgery. How many photons per second does a $\mathrm{CO}_{2}$ laser deliver to the tissue during its use in an operation?
(II) Pulsed lasers used for science and medicine produce very brief bursts of electromagnetic energy. If the laser light wavelength is 1062 nm (Neodymium-YAG laser), and the pulse lasts for 34 picoseconds, how many wavelengths are found within the laser pulse? How brief would the pulse need to be to fit only one wavelength?
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