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Coherent Laser
Types Of Lasers Used In Medical Procedures
The types of lasers used in medical procedures come in a variety of intensities to suit a number of different purposes. Below is some basic information regarding the various types and uses of medical lasers.
Cold Lasers
Low level laser therapy is an up and coming alternative medical treatment. Low level lasers, also called cold lasers, emit a mild beam that can be quite helpful in a number of noninvasive procedures. It's been found that certain wavelengths of light at certain intensities can have a beneficial effect on tissue regeneration, inflammation and pain. The lasers are used in mild, non-surgical procedures, including a replacement for liposuction.
Aesthetic lasers use low level laser technology to biostimulate natural detoxification processes, which results in fat loss. They can also be used to increase the body's ability to heal, relieve pain and reduce swelling. Cold, low level lasers have proved effective in alleviating chronic pain, soft tissue injury, and wound healing. They have also been found to relieve joint and muscle pain as well.
Carbon Dioxide Laser
This laser is a highly precise, bloodless light scalpel used for incising and excising tissue while sealing blood vessels. The carbon dioxide laser is probably what most people think of when they picture laser surgery. This laser is strictly for going in and cutting, yet it creates an incision that doesn't bleed, as the light stops the bleeding on contact. It's far more exact with fewer complications than the traditional scalpel.
Argon Laser
This laser produces a blue-green, coherent light at a variety of different wavelengths, 80% of which occur between 488 and 515 nm. This laser was actually first used in eye surgery to treat diabetic retinopathy without damaging the clear anterior parts of the eye. The laser is now widely used for blood vessel coagulation but can also perform slow, thermal tissue destruction at increased power levels.
Neodymium-YAG Laser
This laser is used both for tissue destruction and to control the flow of normal to abnormal blood vessels. Producing infrared coherent light at a wavelength of 1060 nm, this laser's beam is deeply absorbed in the tissue. It is quite useful in gastrointestinal and urologic pathology.
About the Author
For more resources regarding cosmetic laser or even about surgical laser and especially about liposuction laser please review these pages.
Coherent light from a laser is split into two beams with intensities I0 and 9I0, respectively. What is the ran?
Coherent light from a laser is split into two beams with intensities I0 and 9I0, respectively. What is the range of possible light intensities when the beams are recombined?
http://www.webassign.net/images/lteq.gif
Let k = A/sqrt(I) ==> A = k*sqrt(I) ==> I = (A/k)^2
The two amplitudes are in the ratio 1:3
A1 = k*sqrt(I0); A2 = k*sqrt(9I0) = 3k*sqrt(I0)
The limits are:
lower = A1 and A2 out of phase; Amin = A2-A1 = 2k*sqrt(I0)
upper = A1 and A2 in phase; Amax = A2+A1 = 4k*sqrt(I0)
I = (A/k)^2
Imin = (Amin/k)^2 = 4*I0
Imax = (Amax/k)^2 = 16*I0
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