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Topic: Dye laser


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  Dye Lasers   (Site not responding. Last check: 2007-11-04)
Dye lasers are radically different from other types of lasers in that dye lasers use liquid organic dyes.
Since the dyes used in tunable dye lasers are fluorescent, another light source is almost always used to "pump" the dye and cause the population inversion.
The dye cell is usually inside a cavity consisting of a partially reflective mirror on the front and a diffraction grating at the rear.
www.lasalle.edu /academ/chem/laser_web/dye_laser.htm   (543 words)

  
 Laser - Wikipedia, the free encyclopedia
Lasers range in size from microscopic diode lasers (top) with numerous applications, to football field sized neodymium glass lasers (bottom) used for inertial confinement fusion, nuclear weapons research and other high energy density physics experiments.
The output of a laser may be a continuous, constant-amplitude output (known as CW or continuous wave), or pulsed, by using the techniques of Q-switching, modelocking, or gain-switching.
In 1916, Albert Einstein laid the foundation for the invention of the laser and its predecessor, the maser, in a ground-breaking rederivation of Max Planck's law of radiation based on the concepts of spontaneous and induced emission.
en.wikipedia.org /wiki/Laser   (4669 words)

  
 Dye laser - Wikipedia, the free encyclopedia
A dye laser used at the Starfire Optical Range for LIDAR and laser guide star experiments is tuned to the sodium D line and used to excite sodium atoms in the upper atmosphere.
A dye laser is a laser that uses an organic dye as a lasing medium, usually as a liquid solution.
Since organic dyes tend to degrade under the influence of light, the dye solution is normally circulated from a large reservoir.
en.wikipedia.org /wiki/Dye_laser   (299 words)

  
 Dye Laser
The dye laser is based on the ability of certain organic dyes to absorb the energy of a source and then re-radiate the energy as laser radiation.
The dye laser is unusual in that it is not defined by a single lasing medium.
In a laser system such as ours, where the absorption band of the absorbing elements consists of many levels, this absorption cross section is determined by the cross section of the pump's light divided by the energy of the pump photon.
members.aol.com /kpublish/Laser/Dye_Laser.html   (3269 words)

  
 Professor Mark Csele's Home Page - Dye Laser Projects   (Site not responding. Last check: 2007-11-04)
The dye cell for my research laser was inside a cavity consisting of a partially reflective mirror on the front (the output coupler) and a diffraction grating at the rear.
Flashlamp pumped dye lasers are simple in construction however they have much lower gain that laser-pumped lasers and so the optics are more critical (unlike the previous laser, superradiant operation does not occur so optics must be carefully aligned for the laser to work).
Visible to the left of the dye cell is the output coupler on an adjustable aluminum mount.
www.technology.niagarac.on.ca /people/mcsele/dyelasers.htm   (2049 words)

  
 Types of Lasers
The molecules of these dyes have a large number of spectral lines and each of them has a characteristic spread of frequencies which is large compared to the spread of gaseous atomic spectral lines.
The dye laser medium is typically in liquid form and the dye is circulated continuously through the laser chamber to keep it from being limited by saturation effects.
The dye may be pumped by flash lamps or by another laser such as an argon ion laser.
hyperphysics.phy-astr.gsu.edu /hbase/optmod/lasert.html   (647 words)

  
 Sam's Laser FAQ - Home-Built Dye Laser
Dye lasers are unique in that they are a class of lasers whose lasing medium is a liquid.
For example, Rhodamine-B, a common dye used in dye lasers for the red region, is often pumped with an argon ion laser at 514 nm for CW operation or a doubled YAG laser at 532 nm when pulsed.
Laser output: The home-built Dye laser may be capable of producing a pulses of coherent light with enough energy to be a hazard to vision.
repairfaq.ece.drexel.edu /sam/lasercdy.htm   (11274 words)

  
 Imaging Laser-Cooled Gallium and Dye Laser Frequency Stabilization
Laser cooling is the process of using the momentum of photons to lower the kinetic energy of an atom.
This was done to allow the laser as little time as possible to drift from the frequency being tested (and thus changing the properties of the probe beam fluorescence).
In Figure 3.3, the laser was manually placed at the midpoint of the peak (the "lock point") and was then allowed to drift as the laser frequency changes (Unlocked signal) and was also locked using the feedback electronics (locked signal).
www.physics.colostate.edu /groups/lasers/undergrad/imaging.htm   (3576 words)

  
 Pulsed dye laser therapy does not improve acne,
Laser therapy is an attractive option for treating acne because it produces so few side effects and avoids the potential complications of medications.
In addition to pulsed dye lasers, other types of laser therapy using different wavelengths of light are being used to treat acne.
ICN Pharmaceuticals donated the NLite Lasers used in the study, but the study was designed, performed, analyzed and reported solely by the faculty and staff of the U-M Department of Dermatology.
www.medicalnewstoday.com /medicalnews.php?newsid=9532   (855 words)

  
 Pulsed Dye Laser Therapy Helps Psoriasis | BunionBusters.com
With the pulsed dye laser, the abnormal mass of small blood vessels that grow in psoriasis lesions is destroyed.
The pulsed dye laser clears psoriatic lesions by selectively destroying the blood vessels responsible for skin inflammation from the inside out, without damaging the surrounding skin.
A Pulsed Dye Laser is a special type of medical laser The name refers to the material used to generate the laser beam.
www.bunionbusters.com /services/psoriasis.asp   (744 words)

  
 Flashlamp Pulsed Dye Laser Wart Treatment | BunionBusters.com
The Flashlamp Pulsed Dye Laser is a device that emits a tiny, but powerful pulse of light that is absorbed by the pigment within the red blood cells of the wart.
The pulsed dye laser also can remove or greatly reduce vascular lesions, such as port-wine and other red birthmarks, stretch marks, scars, and conspicuous veins on the nose, chin and cheeks.
Flashlamp Pulsed Dye Laser for the effective treatment of warts Every year 3.5 million people in the United States are treated for verrucae, or warts.
www.bunionbusters.com /services/pulsedye.asp   (2279 words)

  
 Pulsed Dye Laser Bibliography
Pulsed dye laser (SPTL-la, Candela Laser Corp., Wayland, MA) energy was delivered via the micromanipulator with the 3.1-mm spot size in single pulses of 6, 8, and 10 Joules/cm2 and applied to the vessels of the vocal folds, epiglottis, and arytenoids cartilage.
Pulsed dye laser may have promise in treatment of vascular lesions of the larynx and upper airway.
We conclude that in-office use of the pulsed dye laser is a relatively safe and effective method for treating laryngeal granulomas that do not respond to antireflux therapy and speech therapy.
www.kayelemetrics.com /pdlbib.htm   (3455 words)

  
 A Joss Research Institute Report: The Dye Laser Head We Bought on eBay...   (Site not responding. Last check: 2007-11-04)
The light from the flashlamp was coupled into the dye cell by a diffuse white reflector, and I wasn’t sure whether that would work at all well.
The dye solution was Rhodamine 6G in 91% isopropanol; I took the first picture with the camera white-balance set to “Cloudy”, to get moderately reasonable color rendition of the laser output, at the expense of making the wall look somewhat greenish.
I have taken the laser down so that I can mount it on a piece of extruded aluminum “L” that used to be the optical rail in a pulsed YAG laser.
www.jonsinger.org /jossresearch/lasers/dye/ebayhead.html   (1992 words)

  
 Vascular Laser
After laser treatment, the skin overlying the treated area remains intact and healing occurs with new collagen formation in the deep layer of the skin.
Injection therapy and vascular laser treatment for lower extremity spider veins are complementary procedures whose application must be individualized to clinical circumstances and desires.
These lasers are not as specific to the destruction of the blood vessels in vascular lesions and have resulted in scarring in many individuals.
www.ivseasonsskincare.com /Vascularlaser.html   (1333 words)

  
 Flash lamp Pumped Dye Laser
During operation the UV laser beam is projected by cylindrical lenses on very tin line over the dye cell, this line defines the volume in with light amplification occurs.
A flashlamp pumped dye laser does not have this problem, as long as you can make a capacitor big enough, with big enough voltage and a strong enough flashlamp to stand the energy, the laser can be as powerful as you want.
I noticed that when a laser beam (from a laser pointer) crossed the dye cell, the heat of my hand during a few seconds would be enough to cause temperature gradients on the dye that completely  disturbed the laser beam emerging  from it.
www.geocities.com /resalles/dye/dye_laser.html   (595 words)

  
 Laser Treatment of Acne Scars Proves Successful
Research has shown that combining the use of the pulsed dye technology with carbon dioxide laser vaporization was found to provide improvement in non-reddened, minimally thickened scars.
The pulsed dye laser procedure is typically performed on an outpatient basis without general anesthesia.
Pulsed dye lasers are now the preferred treatment for red or thick scars, whereas carbon dioxide laser resurfacing for atrophic scars is now surpassing the results obtained from dermabrasion and chemical peels.
www.kidsource.com /kidsource/content3/news3/laser.acne.news.html   (637 words)

  
 PTI Manuals Online: Model GL-302 Dye Laser   (Site not responding. Last check: 2007-11-04)
Hold the dye cell by the corners near the top where the beam is not transmitted.
Refer to the dye laser tuning curve for the spectral emission of the dye being used.
The only regular service required by the GL-302 is the upkeep of the laser dyes and the occasional cleaning of the dye cells (refer to the next section).
www.pti-nj.com /manual_gl-302.html   (922 words)

  
 Erasure Pulse Dye Laser   (Site not responding. Last check: 2007-11-04)
This laser has been recently approved by the FDA for use on scars, portwine birthmarks, and spider veins.
The Erasure Pulse dye laser is most notably known for it's prevention of post-surgical scarring.
For a Flawless Finish In March of 1999 the EraSure Pulse Dye Laser was approved for use in the United States.
www.tomhaasmd.com /procedures/lazer_dye.cfm   (224 words)

  
 Pulsed dye laser for Sturge-Weber syndrome -- Léauté-Labréze et al. 87 (5): 434 -- Archives of ...   (Site not responding. Last check: 2007-11-04)
Pulsed dye laser for Sturge-Weber syndrome -- Léauté-Labréze et al.
eight patients with a 585 nm pulsed dye laser.
Taïeb A, Touati L, Cony M. Treatment of port-wine stains with the 585-nm flashlamp-pulsed tunable dye laser: a study of 74 patients.
adc.bmjjournals.com /cgi/content/full/87/5/434   (893 words)

  
 Rebuilt Used Lambda Physik FL3002E Dye Laser
The FL-3002E is equipped with a built in scan control unit, which is used to scan the grating, inner cavity angle tuned etalon, and frequency doubling crystals.
Listed below is a sample laser induced fluorescence (LIF) spectrum of room temperature iodine vapor recorded with one of these Lambda Physik FL-3002E dye lasers.
The spectrum is congested with multiple transitions due to the 5/2 nuclear spin of iodine and the underlying hyperfine structure.
www.pchemlabs.com /product.asp?pid=262   (293 words)

  
 Renato's N2 laser page
Nitrogen lasers are rather simple devices to build, because plain air (which is about 70% N2) may be used as lasing gas and all other components can be found at your garage or the next door hardware store.
For the laser to work well with air at about 30torr the distances from the gourd plate should be no more than: 0.2mm for the upper plate, 5mm for the spark gap, 5mm for the laser discharge channel.
The laser after all is very sensitive to the presence of any organic molecule.
www.geocities.com /resalles/N2/n2_laser.html   (1677 words)

  
 Pulsed Dye Laser - My Child Has - Children's Hospital Boston   (Site not responding. Last check: 2007-11-04)
During the treatment, the physician will hold a handpiece or wand against the skin and "pulse" the laser.
The laser light feels a bit like a rubber band snapping against the skin.
Treated skin may also be overly sensitive to the sun and should not be exposed for several months.
www.childrenshospital.org /az/Site1503/mainpageS1503P0.html   (428 words)

  
 UMHS Press Release: Pulsed dye laser therapy does not improve acne
The only way to know how to advise patients is to objectively study these treatments,” says lead study author Jeffrey Orringer, M.D., clinical assistant professor of dermatology at the U-M Medical School.
It is easy to see how, without the split-face design, some changes could be interpreted as a treatment-related improvement,” says Orringer, director of the Cosmetic Dermatology and Laser Center at UMHS.
ICN Pharmaceuticals donated the NLite â Lasers used in the study, but the study was designed, performed, analyzed and reported solely by the faculty and staff of the U-M Department of Dermatology.
www.med.umich.edu /opm/newspage/2004/pulsed.htm   (897 words)

  
 Lloyd Dermatology Center: Cynosure Pulsed Dye Lasers
The Cynosure PhotoGenica V Pulsed Dye Laser was originally designed for the removal of skin lesions composed of blood vessels.
The laser works by emitting a powerful yellow light which selectively destroys the targeted blood vessels, leaving the surrounding skin unharmed.
Both lasers can be used for the treatment of a full range of vascular lesions including:
www.lloyd-derm.com /lasers/dye_laser.html   (139 words)

  
 DYE LASER PRINCIPLES   (Site not responding. Last check: 2007-11-04)
Duarte and L. Hillman (Eds), Dye Laser Principles (Academic, New York, 1990)
Dye Laser Principles has become one of the most cited titles in the field of tunable lasers.
This is probably the most detailed and up-to-date overview of dye laser technology that exists at present.
www.opticsjournal.com /dlp.htm   (130 words)

  
 Cynosure PhotoGenica V Pulsed Dye Laser while on accutane
I wanted to know if you agree that one can receive this type of laser while on accutane and that the laser would not result with injury to the outer layer of skin.
I have spoken to some others who had lasers and light chemical peels done throughout their treatment.
A noninvasive treatment from a pulsed dye laser should be no problem from a safety standpoint.
www.medhelp.org /forums/dermatology/messages/32322.html   (462 words)

  
 Genesee Valley Laser Centre - Flashlamp Pulsed-Dye Laser (ScleroPlus)
The Flashlamp Pulsed-Dye Laser's long pulse width gives desired longer (gentler) heat impact while its multiple wavelengths allow deeper penetration.
The laser's Dynamic Cooling Device (DCD) delivers a spray of cool air prior to the laser pulse, protecting the epidermis and reducing the risk of blistering, pupura and pigmentary changes.
This laser is “tuned” to only affect the darker, more dense blood vessels deep in the skin that cause birthmarks, port wine stains (PWS), and other red spots, leaving the lighter less dense outer skin with no damage.
www.gvlasercentre.com /laser/flashlamp.htm   (125 words)

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