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Photon beams from a tunable laser are used to selectively excite and promote cloud of atoms or molecules from ground state to higher excited states in resonance ionization. Resonance ionization is a process in optical physics used to excite a specific atom (or molecule) beyond its ionization potential to form an ion using a beam of photons ...
Laser radiation being delivered via a fiber for photodynamic therapy to treat cancer. A 40-watt CO 2 laser with applications in ENT, gynecology, dermatology, oral surgery, and podiatry. Laser medicine is the use of lasers in medical diagnosis, treatments, or therapies, such as laser photodynamic therapy, [1] photorejuvenation, and laser surgery.
Babinet's principle [1]; Ballistic photon; Bandwidth-limited pulse; Bandwidth (signal processing) Barcode reader; Basir; Beam-powered propulsion; Beam diameter
A fifth ultraviolet laser based technology uses special slides coated with an energy transfer coating which, when activated by the laser pulse, propels the tissue or cells into a collection cap. The laser cutting width is usually less than 1 μm, thus the target cells are not affected by the laser beam.
Whereas high-power lasers are used in laser medicine to cut or destroy tissue, it is claimed that application of low-power lasers relieves pain or stimulates and enhances cell function. The effects appear to be limited to a specified set of wavelengths and new research has demonstrated effectiveness at myopia control. [6]
An other active research area of laser–matter interaction is the radiation pressure acceleration of ions or protons from thin–foil targets. [35] High ion energy beams can be generated for medical applications (for example in ion beam therapy [36]) by the radiation pressure of short laser pulses on ultra-thin foils.
Laser surgery is a type of surgery that cuts tissue using a laser in contrast to using a scalpel. [ 1 ] Soft-tissue laser surgery is used in a variety of applications in humans ( general surgery , neurosurgery , ENT , dentistry , orthodontics , [ 2 ] and oral and maxillofacial surgery ) as well as veterinary [ 3 ] surgical fields.
The laser beam is focused in the sample, which contains fluorescent particles (molecules) in such high dilution, that only a few are within the focal spot (usually 1–100 molecules in one fL). When the particles cross the focal volume, they fluoresce.