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CO2 laser electromagnetic spectrum Fiber laser: gain medium Infrared region Invisible Light

started by Ferdinand Chapman on 30 Jul 12

#1 Ferdinand Chapman on 30 Jul 12

With so numerous possibilities on laser marking methods offered today it is not astonishing that many individuals get baffled with which is the most ideal to their software. A lot of individuals do not even know that the expression "laser", is truly an acronym - Light-weight amplification by stimulated emission of radiation - which explains the method by which a laser beam is developed.

The simple idea of this is easy. A gain medium (the substance that is utilised to produce the laser gentle), is fired up using possibly gentle or electrical power to create photons (the laser mild). All of this is taking place in a closed cavity, with a totally reflective mirror at 1 conclude, and a semi reflective 1 at the other. When the mild bouncing close to within gains sufficient power, it escapes by way of the semi-reflective mirror.

These substantial electricity photons are then concentrated to a tiny spot (significantly like you did at university when you utilized a magnifying glass to target the daylight to burn up issues!). If it is a vector laser, this beam is deflected and directed using a pair of mirrors (X and Y deflection). This guide will support you recognize the capabilities of the three most common lasers obtainable in the market these days:

· A CO2 laser: the Carbon Dioxide fuel sealed within the laser (along with some other gases - most generally nitrogen, and helium) is pumped (enthusiastic / warmed up) using electrical vitality (DC, AC or RF) which results in the stream of photons.

· An Nd:YAG laser: the neodymium-doped yttrium aluminium garnet (Nd:Y3Al5O12) is pumped using a lamp or diode to emit the stream of photons.

· A Fiber laser: a glass fiber doped with a scarce earth ion - most commonlyytterbium (Yb3+) - is diode pumped and the photons generated are mirrored down the fiber in direction of the deflecting mirrors.

What are the variances?

The standard differences among the nd:YAG / Fiber and CO2 Lasers is the wavelength of the beam that it creates. The light-weight emitted from a laser sits within the Invisible Light-weight - Infrared location of the electromagnetic spectrum.

The mild of the YAG and fiber lasers are emitted at a wavelength that is exactly 10 moments more compact (one.064 µm) than that of a CO2 laser(ten.six µm).

This more compact wavelength also indicates that if the Nd:YAG/Fiber and CO2 lasers have been used in the identical software (with the identical established-up). The Nd:YAG/Fiber would have a considerably more compact spot measurement and consequently, mark with a greater resolution.

What variation does this make?

These wavelengths decide which laser should be utilised for each and every program, as the material to be marked will have diverse absorption features (of the gentle at various wavelengths). If a substance can absorb the mild, then it can be afflicted by it.

Which 1 must I use for steel?

Most metals are very reflective and therefore, an Nd:YAG or Fiber laser would be most suited.The wavelength staying considerably shorter implies there will be considerably less reflection of the beam on the area, consequently considerably less loss of power and as a result less difficult functioning of the metallic. The metal absorbs much more of the mild vitality that adjustments its physical qualities.

Which one particular should I use for non - steel?

Natural supplies these kinds of as wood, acrylics, plastics, fabrics, and transparent objects are better suited to the CO2 as the wavelength is extended and has a lot more permission. Nevertheless the Nd:YAG and Fiber lasers can be employed to mark some non-metals as well. But if the item is transparent (eg. glass) then the YAG / Fiber laser light will go via it without having marking it.

Laser markers can generate alpha-numeric characters, bar codes, serial quantities, logo's, artwork and other graphic photographs utilizing a non-speak to thermal approach.

Is there an easy way of understanding which would be most acceptable?

Ideally, a sample of the substance would have to be analyzed , but generally feel of CO2 for Natural and organic and YAG and its derivatives (Fiber, nd:YAG .. etc) for Non Natural and organic materials.

Alright, I have made a decision to go for both an nd:YAG or Fiber laser, what are the variances?

· The nd:YAG uses a lamp or a diode pack (array) to excite the achieve medium - these need much more electrical electrical power and wear out (and are really expensive to change). They, also generate a whole lot of heat and demand much more warmth dissipation (some water cooled - most now use warmth-sinks and thermo-electric cooling techniques)

· The fiber lasers use many simple emitter diodes that are less costly to operate, and will previous the lifetime of the fiber. The imply time prior to failure is higher than 50,000hrs

· The fiber laser is far more stable at all power amounts.

· The light-weight resource with a fiber is totally sealed all the way to the marking head. This stops dust and particle contamination and allows lengthier working distances among the control device and marking head. It also decreases any leakage and therefore raises the effectiveness of the laser beam.

· The fiber laser "boots up" a lot quicker.

· The fiber laser has significantly less substitute parts (this kind of as resonator mirrors, crystals, fluids and filters)

REFERENCES:

http://www.articlemayhem.com/Art/524976/13/Info-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking.html

http://www.articlemayhem.com/Art/524977/13/Facts-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking.html

http://www.articlemotron.com/Article/Details-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking/856521

<div class="cArrow"> </div><div class="cContentInner">With so numerous possibilities on laser marking methods offered today it is not astonishing that many individuals get baffled with which is the most ideal to their software. A lot of individuals do not even know that the expression "laser", is truly an acronym - Light-weight amplification by stimulated emission of radiation - which explains the method by which a laser beam is developed. The simple idea of this is easy. A gain medium (the substance that is utilised to produce the laser gentle), is fired up using possibly gentle or electrical power to create photons (the laser mild). All of this is taking place in a closed cavity, with a totally reflective mirror at 1 conclude, and a semi reflective 1 at the other. When the mild bouncing close to within gains sufficient power, it escapes by way of the semi-reflective mirror. These substantial electricity photons are then concentrated to a tiny spot (significantly like you did at university when you utilized a magnifying glass to target the daylight to burn up issues!). If it is a vector laser, this beam is deflected and directed using a pair of mirrors (X and Y deflection). This guide will support you recognize the capabilities of the three most common lasers obtainable in the market these days: · A CO2 laser: the Carbon Dioxide fuel sealed within the laser (along with some other gases - most generally nitrogen, and helium) is pumped (enthusiastic / warmed up) using electrical vitality (DC, AC or RF) which results in the stream of photons. · An Nd:YAG laser: the neodymium-doped yttrium aluminium garnet (Nd:Y3Al5O12) is pumped using a lamp or diode to emit the stream of photons. · A Fiber laser: a glass fiber doped with a scarce earth ion - most commonlyytterbium (Yb3+) - is diode pumped and the photons generated are mirrored down the fiber in direction of the deflecting mirrors. What are the variances? The standard differences among the nd:YAG / Fiber and CO2 Lasers is the wavelength of the beam that it creates. The light-weight emitted from a laser sits within the Invisible Light-weight - Infrared location of the electromagnetic spectrum. The mild of the YAG and fiber lasers are emitted at a wavelength that is exactly 10 moments more compact (one.064 µm) than that of a CO2 laser(ten.six µm). This more compact wavelength also indicates that if the Nd:YAG/Fiber and CO2 lasers have been used in the identical software (with the identical established-up). The Nd:YAG/Fiber would have a considerably more compact spot measurement and consequently, mark with a greater resolution. What variation does this make? These wavelengths decide which laser should be utilised for each and every program, as the material to be marked will have diverse absorption features (of the gentle at various wavelengths). If a substance can absorb the mild, then it can be afflicted by it. Which 1 must I use for steel? Most metals are very reflective and therefore, an Nd:YAG or Fiber laser would be most suited.The wavelength staying considerably shorter implies there will be considerably less reflection of the beam on the area, consequently considerably less loss of power and as a result less difficult functioning of the metallic. The metal absorbs much more of the mild vitality that adjustments its physical qualities. Which one particular should I use for non - steel? Natural supplies these kinds of as wood, acrylics, plastics, fabrics, and transparent objects are better suited to the CO2 as the wavelength is extended and has a lot more permission. Nevertheless the Nd:YAG and Fiber lasers can be employed to mark some non-metals as well. But if the item is transparent (eg. glass) then the YAG / Fiber laser light will go via it without having marking it. Laser markers can generate alpha-numeric characters, bar codes, serial quantities, logo's, artwork and other graphic photographs utilizing a non-speak to thermal approach. Is there an easy way of understanding which would be most acceptable? Ideally, a sample of the substance would have to be analyzed , but generally feel of CO2 for Natural and organic and YAG and its derivatives (Fiber, nd:YAG .. etc) for Non Natural and organic materials. Alright, I have made a decision to go for both an nd:YAG or Fiber laser, what are the variances? · The nd:YAG uses a lamp or a diode pack (array) to excite the achieve medium - these need much more electrical electrical power and wear out (and are really expensive to change). They, also generate a whole lot of heat and demand much more warmth dissipation (some water cooled - most now use warmth-sinks and thermo-electric cooling techniques) · The fiber lasers use many simple emitter diodes that are less costly to operate, and will previous the lifetime of the fiber. The imply time prior to failure is higher than 50,000hrs · The fiber laser is far more stable at all power amounts. · The light-weight resource with a fiber is totally sealed all the way to the marking head. This stops dust and particle contamination and allows lengthier working distances among the control device and marking head. It also decreases any leakage and therefore raises the effectiveness of the laser beam. · The fiber laser "boots up" a lot quicker. · The fiber laser has significantly less substitute parts (this kind of as resonator mirrors, crystals, fluids and filters) REFERENCES: <a rel="nofollow" href="http://www.articlemayhem.com/Art/524976/13/Info-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking.html">http://www.articlemayhem.com/Art/524976/13/Info-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking.html</a> <a rel="nofollow" href="http://www.articlemayhem.com/Art/524977/13/Facts-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking.html">http://www.articlemayhem.com/Art/524977/13/Facts-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking.html</a> <a rel="nofollow" href="http://www.articlemotron.com/Article/Details-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking/856521">http://www.articlemotron.com/Article/Details-About-Yag-Laser-Marking-System-And-Fiber-Laser-Marking/856521</a></div>

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