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Posted: Nov. 5, 2009 - 1 comment(s) [ Comment ] - 0 trackback(s) [ Trackback ]

Here we will mainly introduce the comparison between Diode-pump Laser Marking Machine and YAG Lamp-pump Laser Marking Machine.Diode Pump Laser Marking Machine and Lamp-pump Laser Marking Machine are all based on the ND: YAG (neodymium-doped yttrium aluminum garnet) crystal as a laser-produced material, which can be converted 808nm visible laser to 1064nm not visible laser light, but another more critical factor of the output laser is the laser pump source which can make the crystal rod put out laser light, the Diode-pump Laser Marking Machineuses semiconductor diode-pumped to send out 808nm light waves; and lamp-pump use krypton lamp to issue lamp pump, but light sent out from the krypton lamp has wider light spectrum, with only one slightly larger peak in the 808nm Department, the light in other wavelengths eventually turned into useless heat dissipation out. Therefore, the conversion efficiency of Diode-pumped Laser Marking Machine is much higher than the Lamp-pump Laser Marking Machine. Benefits of Diode Pump Laser Marking Machine are as follows:

First, Diode-pump Laser Marking Machine has no need to change krypton lamp.

The life span of semiconductor diode is quite long, its rated working hours is larger than ten thousand hours, while the lifetime of krypton lamp is only several hundred hours (usually about 400-600 hours), as a result, lamp pump Laser Marking Machine need to change krypton lamp at work for some time, especially for the metal marking, more energy will be needed, the lifetime of krypton will be more affected.

Therefore, Diode Pump Laser Marking Machine is also called maintenance-free Laser Marking Machine, which means no working materialconsumption, no maintenance for quite a long time. According to different production tasks of different users, the lifetime of Diode-pump Laser Marking Machine can guarantee between one and three years.

related:http://www.lasermarkingsystem.org

Posted: Nov. 2, 2009 - 1 comment(s) [ Comment ] - 0 trackback(s) [ Trackback ]

High power fiber optic laser marking machine and cladding pumped technology

The emergence of double coated optical fiber is undoubtedly a major breakthrough in the field of optical fiber, which has made the production of high power fiber optic laser marking machine and high power fiber optical amplifiers become a reality. Since the first description of cladding pumped fiber optic Laser Marking Machine by E Snitzer in 1988, cladding pump technology has been widely used in fields of fiber optic laser marking machine and fiber optic amplifiers, which has become the preferred way of high power fiber optic laser marking machine production.

Cladding pumping technology composed of four levels:

1) fiber optic level; 2)inner cladding, 3)outsourcing layer, 4)protection layer. Technical characteristics of cladding pump have decided the following aspects of outstanding performance of such Fiber Opticl Laser Marking Machine:

First, high output power. A multi-mode pump diode module group may radiate 100 watts of optical power, a number of multi-mode pump diode in parallel settings can be allowed to design fiber optic laser marking machine with quite high output power.

Second, no need of thermoelectric cooler. Such high power wide surface multi-mold diode of the Fiber Opticl Laser Marking Machine can work in especially high temperature, only a simple air cooling in need, and low cost.

Third, wide pump wavelength range. There are erbium and Yb rare earth elements doped in the active cladding of high power fiber optic laser marking machine, which has a wide and flat absorption area of light wave (930-970m), as a result, pump diode doesn’t need any kind of wavelength stabilization device.

Fourth, high efficiency. Pump light can across single-mode fiber optical core several times, so the fiber optic laser marking machine has very high utilization rate.

Fifth, high reliability. Comparing with single-mold pump diode, the stability of multi-mold pump diode is much higher. The geometry width has made the light power density and current coming across active face of the fiber optic laser marking machine all very low. As a result, the operating lifetime of pump diode laser marking machine can be over one million hours.

related:

http://www.lasermarkingsystem.org

Posted: Oct. 31, 2009 - 1 comment(s) [ Comment ] - 0 trackback(s) [ Trackback ]

The advanced fiber optic Laser Marking Machine

Fiber optic Laser Marking Machine is a Laser Marking Machine which use glass fiber optic doped with rare earth as the gain medium. Fiber Optic Laser Marking Machine is developed basing on fiber optic amplifier. It is quite easy to form high output density inside fiber optic under the action of pump light, resulting in laser energy level inversion.

Fiber optic Laser Marking Machine has very wide application including laser fiber optic communication, laser space long-distance communication, industrial shipbuilding, automobile manufacturing, laser engraving, laser marking, laser cutting, roller of printing system, drilling, cutting and welding of metal and nonmetals, military defense and security, medical devices equipment, major infrastructure projects and so on.

As the representative of the third generation laser technology, Fiber Optic Laser Marking Machine has the following advantages: The advantages miniaturization and intensification brought by the low processing cost and sophisticated technology of glass fiber optic Laser Marking Machine, and the routability of fiber optic.Glass material has a very low volume area ratio, quick thermal dissipation, low consumption, thus conversion efficiency is very high and laser threshold is low. The wavelength of output laser is long, which is because of the rich energy level and various kinds of rare-earth ions. Coordinability of Laser Marking Machine: since the energy level of rare earth ions and fluorescence spectrum of glass fiber optic are all quite wide. Because there is no optical glasses inside of the resonant cavity of fiber optic Laser Marking Machine, with the advantages of adjustment free, maintenance free and high stability, which the traditional Laser Marking Machine cannot compare with. Fiber derived can make the fiber optic Laser Marking Machine can be capable to multi-dimensional space process easily, which has made it easy for the design of mechanical system.Fiber optic Laser Marking Machine can compete with poor working environment, which has quite high level tolerance to dust, shock, humidity and temperature. There is no need of thermoelectric cooling and water cooling, but a simple air cooling during the orking of Fiber Optic Laser Marking Machine. High electro-optical efficiency of Fiber Optic Laser Marking Machine: the integrated electro-optical efficiency can reach as high as 20%, which has greatly saved the power consumption and operating cost. High output power of fiber optic Laser Marking Machine, the output power of commercial fiber optic Laser Marking Machine available is six kilowatts.

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Posted: Oct. 30, 2009 - 1 comment(s) [ Comment ] - 0 trackback(s) [ Trackback ]
Laser marking machine used in electronics

According to the China Electronics Industry Association statistics, China is the world's production superpower of television sets, tape recorders, VCD disc machines, telephones, electronic watches, calculators, and refrigerators, air conditioners, etc, and the major manufacturer of program-controlled switches, PC machine, mobile phones, soft and hard drives, monitors, computer boards, mouse, and other products. Broad range of electronic products and easy reunification of manufacturing standards have provided a huge developing space for Laser Marking Machine.

Working principle of Laser Marking Machine: Heat processing (laser marking machine): a high energy density laser beam is radiated on the processed material surface, material surface will absorb the laser energy, produce heat stimulation process, and then to make the temperature of material surface rise and result in abnormal, melting, ablation, evaporation and so on.

Cold processing(Laser Marking Machine): a high energy load (UV) photons can interrupt chemical bonds of material (especially organic materials) or surrounding inter chemical bonds so as to occur non-thermal processing damage of the material. This cool process has significant meaning in laser marking machine processing work.

Characteristics of CO2 Laser Marking Machine: wide application, a variety of materials( metal, glass, ceramics, plastics, leather, etc.) can all be marked with high quality marking by laser marking machine. laser marking machine can be used to the mark of IC, resistors, capacitors, crystal oscillator, diodes, transistors and other components. Laser marking machine has no force on surface of working pieces, and there will be no mechanical deformation, and no corrosive to materials. Laser Marking Machine

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Posted: Oct. 30, 2009 - 0 comment(s) [ Comment ] - 0 trackback(s) [ Trackback ]

Before the birth of Fiber Optic Laser Marking Machine, the continuous or pulsed CO2 laser marking machine and Nd:YAG laser marking machine are usually used as laser source of laser marking system. Fiber optic laser marking appeared in the end of last 90s, and soon be used in laser marking system.

Comparing with traditional laser marking machine, Fiber optic laser marking machine is totally air-cooling type, without need of water cooling and concerned associated chiller, water cooling pipes and temperature controller, the size and energy consumption have been substantially reduced, using cost of entire machine and can be expected lower than using of traditional laser marking system in a short term and has great market potential.

In the marking of metal material,Fiber Optic Laser Marking Machinemachine can be used to carve clear marks on various metal samples, especially on the metal sample after surface treatment, such as black dyeing, surface plating etc, and particularly suitable for precise mark on these samples.

Fiber Optic Laser Marking MachineFiber Optic Laser Marking Machine

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Posted: Oct. 28, 2009 - 0 comment(s) [ Comment ] - 0 trackback(s) [ Trackback ]

Application characteristics of ND:YAG Laser Marking Machine In laser processing field, laser marking machine is one of the most widely used technologies, the crystal product of present high-tech laser technology and computer technology, which has been applied to mark of all material, including plastic and rubber, metal and silicon chips etc. Comparing with traditional mechanical engrave, chemical etching, screen printing, and ink printing, laser marking machine has the advantages of low cost, high flexibility, computer controlled system, and the most distinct feature is permanent mark while laser working on work piece surface.

Laser Marking Machine can identify single number product of large volume manufacture, and then mark in barcode or dimensional code on products, which is effective in helping to implement the product process control, quality control and prevention of counterfeit products.

The laser marking machine has a wide application in electronic industry, auto and motor industry, medical products, hardware, home appliance, daily necessaries, labeling technology, aviation industry, document, cards, jewelry processing, instrument, and advertising sighs and so on.

The main characteristics of Laser Marking Machine:

1. Wide application: nearly marking all materials.

2. High efficiency laser marking: computer controlled laser beam can move rapidly (linear rate is 5-10m per second), common laser process can finish in several seconds and reach online marking.

3. High precision laser marking: laser can form super fine laser beam and the finest line could reach micron level, which can print various patterns, logo, barcode, and two-dimension code. Laser marking machine can also modify the product appearance and brand effect, and increase product market competiveness.

4. The low use cost: Laser Marking Machine is non-contact marking, which is not limited by fight fatigue life of usual mold marking. Laser marking has low maintenance cost in mass produce.

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