This book summarizes a five year research project, as well as subsequent results regarding high power diode laser systems and their application in materials processing. The text explores the entire chain of technology, from the semiconductor technology, through cooling mounting and assembly, beam shaping and system technology, to applications in the processing of such materials as metals and polymers. Includes theoretical models, a range of important parameters and practical tips. Author: Bachmann, Friedrich/ Loosen, Peter/ Poprawe, Reinhart Series Title: Springer Series in Optical Sciences Series Number: 128 Binding Type: Paperback Number of Pages: 560 Publication Date: 2010/11/29 Language: English Dimensions: 9.21 x 6.14 x 1.14 inches
In this book, the design of InGaN LDs structures including multi quantum wells (MQWs) active region device are described and investigated by integrated system engineering technology computer aided design (ISE TCAD) device simulator. The parameters of the LDs structures are varied and optimized for high performance. This optimization study involves aspects such as thickness of active region, doping, thickness of stopper layer region, thickness of quantum wells and quantum barriers, number of quantum wells and several approaches to improve and achieve high efficiency, low threshold current and high output power of InGaN LDs. The basic LDs structures treated here are FabryPerot type InGaN double heterostructure (DH), separate confinement heterostructure (SCH) and multi quantum wells (MQWs).High performance LD has been obtained by using multi quantum wells incorporated with the optimized parameters. The lowest threshold current, higher external quantum efficiency and characteristic temperature are obtained when the number of InGaN well layers is two, at our laser emission wavelength of 415 nm, which is related to the problem of inhomogeneous carrier. Author: Thahab, Sabah Binding Type: Paperback Number of Pages: 232 Publication Date: 2011/01/31 Language: English Dimensions: 5.98 x 9.00 x 0.53 inches
This book basically gives the over view about The properties of erbiumdoped fiber amplifier (EDFA) such as gain and noise figure have been studied. By determining the characteristics of the 980nm, 1480nm 1550nm laser sources and ASE (amplified spontaneous emission) at the output of the amplifier used to determine the gain and noise figure of EDFA. This model allows to follow the signal (1550nm), pump (980nm) and ASE as they propagate along the fiber and determine population inversion .The both forward and backward propagation ASE are important in determining the overall gain and noise figure. For the amplification of more than 80 channels the DWDM (Dense Wavelength Division Multiplexing) has required CBand (15251565)nm and LBand (15651610)nm EDFA.We show that a flat gain spectrum can be achieved in the range from 1565 to 1610 nm when the EDF length, pump power and pump configuration are appropriately chosen. Special care must be taken when selecting the EDF length. Author: Kumar, Pankaj/ Kumar, Chakresh/ Chack, Devendra Binding Type: Paperback Number of Pages: 68 Publication Date: 2011/06/19 Language: English Dimensions: 9.02 x 5.98 x 0.16 inches
The Chauvet Eclipse LED Laser Effect Light adds an exciting red and green laser star field to a deep blue, high-power LED aura effect. The Eclipse light's independently controllable lasers with fully dimmable LED illumination create an awe-inspiring look that is equally effective with or without fog.Combines LED and laser in one effectSeparate control of laser effect and LED: Laser: rotation direction and speed, separate red and green strobe rates or full on; LED: rotation direction and speed, electronic dimmer (0 - 100%)High-power, 5W (1,000mA) LEDCoverage angle: 120ðLight source (laser): 532nm/30mW green laser diode, 650nm/80mW red laser diodeLight source (LED): 1 deep blue (450nm) LEDWeight: 3.6 lb.Dimensions: 6.4" H x 7.9" W x 9.3" D
Okay, just about everyone has a red laser pointer. Heck, we even sell a fine one here at ThinkGeek. But, we're pretty sure you want to be a superior geek - and doing it with a green laser is the way to go. This pointer is significantly brighter (about 50 times) than a red laser pointer and because of its unusual color it is much more noticeable. I mean come on, a 532 nm green laser wavelength is obviously superior to a laughable 650 nm red laser wavelength. And unlike a red laser, the green beam itself can be seen in mid-air in dark conditions, not just the laser beam dot. This allows the green laser pointer to be used for pointing to star constellations (skypointing) and also just generally look cool as hell. The green laser beam dot can be seen at much greater distances than with a red laser pointer. Since green direct injection laser diodes aren't readily available, this pointer is based on the use of Diode Pumped Solid State Frequency Doubled (DPSSFD) laser technology. A high power IR laser diode at 808 nm pumps a tiny block of Nd:YVO4 generating light at 1,064 nm which feeds a KTP intracavity frequency doubler crystal to produce the green beam at 532 nm. Features of this unit include: Very bright green laser at 532 nm wavelength Output power of Range of approximately 9,000 ft (2600 m) in darkness 1.1 mm beam diameter at source Momentary push button switch Solid, heavy duty construction Constant wave output (as opposed to pulse output) Takes 2 "AAA" batteries (not included) Can be used for skypointing, projection on low clouds, signaling, highlighting potential explosives Dimensions: 5.6" x .5" dia 90-day warranty Available in Black or Silver color Interested in quantity discounts or custom logo imprinting? More info here. Warning: Green lasers are very powerful. Pointing at aircraft may land you in jail. Without a Monopoly card to get you back out. Use it wisely.
The Chauvet Eclipse LED Laser Effect Light adds an exciting red and green laser star field to a deep blue, high-power LED aura effect. The Eclipse light's independently controllable lasers with fully dimmable LED illumination create an awe-inspiring look that is equally effective with or without fog.Combines LED and laser in one effectSeparate control of laser effect and LED: Laser: rotation direction and speed, separate red and green strobe rates or full on; LED: rotation direction and speed, electronic dimmer (0 - 100%)High-power, 5W (1,000mA) LEDCoverage angle: 120Light source (laser): 532nm/30mW green laser diode, 650nm/80mW red laser diodeLight source (LED): 1 deep blue (450nm) LEDWeight: 3.6 lb.Dimensions: 6.4" H x 7.9" W x 9.3" D
Enterococc faecalis considered to be the mostresistant bacteria of the root canal, in the presentstudy we used two types of root canal disinfectant toshow their effect on this type of bacteria, the firstis the diode laser and the second NaOCl solution withspecial concentrations and times. the study conductedon human decoronated extracted teeth, adjusted with13mm root length, filled with a suspension of E.faecalis, Samples were divided into 14 groups eachgroup consisted of 10 prepared roots, sixty sampleswere irrigated with NaOCl solution at differentconcentrations (0.5, 2.5 and 5.25) at twoselected times (2 minutes and 5 minutes) for eachconcentration.Sixty samples were irradiated at different powers (2W, 2.5W and 3W); each power at thetotal irradiation time 30 and 60 seconds. Whencomparison was made between NaOCl irrigant and diodelaser in a combination among differentconcentrations, powers and times the result showedthat 5.25 NaOCl at both 2 minutes and 5 minutes hadthe highest antimicrobial effect with no significantdifferences from 3W laser / 10 sec (6 cycles) butsignificantly different from 3W / 5 sec (6 cycles). Author: Shehab, Najwan F./ Zakaria, Assistant Prof Nawfal a./ Taha, Prof Dr Mahmoud y. Binding Type: Paperback Number of Pages: 104 Publication Date: 2011/07/29 Language: English Dimensions: 9.02 x 5.98 x 0.25 inches
Dime Used to Illustrate Miniature Size of the Diode of an Injection Laser Premium Photographic Print by . Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints.
Description:100% Brand New high quality red laser pointer!Red pen Laser pointer Diode BeamSize: 135mm (L) x 8mm (D)Weight: 47gColor: Dark BlueWavelength: 650nmMax output: 5mW1 Red Laser pointer pen BeamPressure button for Laser BeamVisibility: Over 1 mile ( AVOID DIRECT EYE EXPOSURE)Output Mode: Constant WaveBatteries Type: AAA 1.5V x 2pcs Alkaline Batteries (not included)Useful Kit for Handy Torch, Office/School Presentation, etc.Best choice of gift.Cautions: Avoid direct eye exposure to laser beam
Description:High quality Red Laser Pointer!Laser Pointer Diode BeamWavelength: 650nmMax output: 5mW1 Red Laser pointer pen BeamPressure button for Laser BeamVisibility: Over 1 mile ( AVOID DIRECT EYE EXPOSURE)Output Mode: Constant WaveLaser Pen powered by 2AAA batteries(not included).Use your Laser Pointer to point at any desired targets, project screens, or video monitors, presentations and inspection.Best choice of gifCautions: Avoid direct eye exposure to laser beamSize: 135mm (L) x 11mm (D)Weight: 31g
Description:100% Brand New high quality Red Laser Pointer!Laser Pointer Diode Beam1 Red Laser Pointer pen BeamPressure button for Laser BeamVisibility: Over 1 mile ( AVOID DIRECT EYE EXPOSURE)Output Mode: Constant WaveLaser Pen powered by 2AAA batteries(not included).Use your Laser Pointer to point at any desired targets, project screens, or video monitors, presentations and inspection.Best choice of gift.Cautions: Avoid direct eye exposure to laser beamSize: 135mm (L) x 11mm (D)Weight: 20g
Laser Diode Microsystems provides the reader with the basic knowledge and understanding required for using semiconductor laser diodes in optical microsystems and microoptical electromechanic systems. This tutorial addresses the fundamentals of semiconductor laser operation and design, coupled with an overview of the types of laser diodes suitable for use in Microsystems, along with their distinguishing characteristics. Emphasis is placed on laser diode characterization and measurement as well as the assembly techniques and optical accessories required for incorporation of semiconductor lasers into complex microsystems. Equipped with typical results and calculation examples, this handon text helps readers to develop a feel for how to choose a laser diode, characterize it and incorporate it into a microsystem. Author: Zappe, Hans P./ Zappe, H. Series Title: Microtechnology and Mems (Hardcover) Binding Type: Hardcover Number of Pages: 355 Publication Date: 2003/10/10 Language: English Dimensions: 9.21 x 6.14 x 0.81 inches
LED (Light Emitting Diode) lighting gives extra brightness and longer life than conventional bulbs. Pacer's LED Light Kit works well as a third brake or turn signal indicator. It is actually 12 LED lights within 1 larger light. The compact, slimline design allows a great variety of mounting location options. Includes one light. Mounts with two-sided tape Simple two wire installation Long life Low power draw Each light is 4 5/8'' L x 7/16'' W x 3/4'' H. Available in Red, Amber, White and Blue* *White and blue lights are an additional $2.00
LED (Light Emitting Diode) lighting gives extra brightness and longer life than conventional bulbs. Pacer's LED Light Kit works well when a light with extra length is needed. It is actually 12 LED lights within 1 larger light. The compact, slimline design allows a great variety of mounting location options. Includes one light. Mounts with two-sided tape Simple two wire installation Long life Low power draw Each light is 8'' L x 5/8'' W x 3/4'' H. Available in Red, Amber, White and Blue* *White and blue lights are an additional $6.00
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Homemade Red (650nm) laser (LPC-815) @ 410mA
The Latest Laser Acne Treatments
It may sound like something out of a science fiction novel, but in the world of modern medicine laser surgery is becoming a popular and powerful choice for dealing with a number of different medical conditions. Some of the most cutting edge uses of lasers and focused light are for the treatment of acne. Lasers can be used to burn off the outer layers of skin where acne is, or they can penetrate below the surface of the skin and deal with the underlying causes of acne.
The only real disadvantage to laser acne treatments is that they can be difficult to get and difficult to afford. They're often only used for people with severe acne problems -you'll have to ask a doctor or dermatologist if laser acne treatment would be a good option for you. Also, laser acne treatments are generally considered to be cosmetic procedures, so many insurance companies won't cover them. This can make it difficult for most people to afford having it done.
For those who do have access to laser acne treatments, there are a few different options to choose from. Some laser treatments target glands under the skin called the sebaceous glands. These glands are responsible for secreting the oil that can cause acne. The laser targets them and actually damages them, which makes them produce less oil.
Other types of laser treatments target the bacteria that cause acne inflammation, referred to in the medical community as Propionibacterium acens, or P. acnes. This type of laser treatment can also help to smooth out the skin's overall texture and repair acne scars. It is a powerful combined approach that can really change the way a person looks.
To get more specific, there are different types of lasers that are used in these different procedures. Each laser uses a different approach to do its job. The first type of laser is called the blue light laser. One of the advantages of this treatment is that it's painless, but it must be done over the course of multiple sessions. Unfortunately, acne tends to spread rapidly so these treatments must be undergone regularly to keep it at bay. There is a new version of blue light therapy on the horizon that combines blue and red lights, and it may be even more effective than blue light alone.
The second type of laser treatment works through pulsed green-yellow lights combined with heat energy. The combination of these two factors help shrink the sebaceous glands, thus making them produce less oil. This type of treatment can be used to treat moderate acne outbreaks, but more severe outbreaks may be out of its reach. The only known side effect of this treatment is that it causes the affected areas to be reddened for a brief time.
The last type of laser used in acne laser treatments is the diode laser. These lasers pierce the outer layer of skin and destroy sebaceous glands without damaging the outermost skin layers. This treatment, unlike the others, can be quite painful. However, doctors generally provide some sort of painkiller to dull the pain during treatment. Like the pulsed light treatment, the diode laser can cause redness and also swelling. However, it provides some of the best acne reduction after a couple of treatments.
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