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A distributed Bragg reflector laser (DBR) is a type of single frequency laser diode. Other practical types of single frequency laser diodes include DFB lasers and external cavity diode lasers. A fourth type, the cleaved-coupled-cavity laser has not proven to be commercially viable.
Lasers are used to treat cancer in several different ways. Their high-intensity light can be used to shrink or destroy tumors or precancerous growths. Lasers are most commonly used to treat superficial cancers (cancers on the surface of the body or the lining of internal organs) such as basal-cell skin cancer and the very early stages of some cancers, such as cervical, penile, vaginal, vulvar ...
Time-resolved simulation of a pulse reflecting from a Bragg mirror. A distributed Bragg reflector (DBR) is a reflector used in waveguides, such as optical fibers.It is a structure formed from multiple layers of alternating materials with different refractive index, or by periodic variation of some characteristic (such as height) of a dielectric waveguide, resulting in periodic variation in the ...
A distributed-feedback laser (DFB) is a type of laser diode, quantum-cascade laser or optical-fiber laser where the active region of the device contains a periodically structured element or diffraction grating. The structure builds a one-dimensional interference grating (Bragg scattering), and the grating provides optical feedback for the
The I Am Cait star, 68, shared a graphic photo of her face on Tuesday after undergoing a procedure to remove “sun damage” from her nose. In the pic, Caitlyn has on a white robe and is makeup ...
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.
PIT treatment avoids the side effects problem through the creation of a targeted-photosensitizer, which involves two components: a monoclonal antibody (mAb) which recognizes specific proteins on the surface of cancer cells, and a non-targeted photosensitizer. Even though the new mAb-based photosensitizers are distributed throughout the body, it ...
Paranasal sinus and nasal cavity cancer is a type of cancer that is caused by the appearance and spread of malignant cells into the paranasal sinus and nasal cavity.The cancer most commonly occurs in people between 50 and 70 years old, and occurs twice as often in males as in females. [3]