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5 DERNIERS ARTICLES
- History of High Power Semiconductor Lasers
- Fiber Laser Marking Machine Detailed
- High Power Laser Cutting Equipment and Technology
- Marking Bathroom Products with Laser Marking Machine
- Analysis on Investment Strategy of Laser Processing
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 History of High Power Semiconductor Lasers Alerter l'administrateur Recommander à un ami Lien de l'article 

As efficiency and power continue to increase, laser diodes will continue to replace traditional technologies, changing the way existing things are handled and creating new things at the same time. Similarly, there is limited awareness of the dramatic development of high power semiconductor lasers. The industry demonstrated for the first time in 1962 that electrons were converted to 500mw laser pointer, and a great deal of progress ensued, all of which led to significant improvements in the conversion of electrons to high-yield laser processes. These improvements support a range of important applications, including optical storage, optical networking, and a wide range of industrial applications.

The innovations of the past decades have brought exciting improvements. In particular, the improvements in brightness are excellent. In 1985, the state of the art high-power semiconductor lasers were able to couple 105 milliwatts of power into a 105-micron core-diameter fiber. State-of-the-art high power semiconductor lasers can now produce over 250 watts and have a single wavelength of 105 micron optical fiber - a 10x increase every eight years.

red laser pointer

The improvement of high-power semiconductor 200mw laser pointer brightness has promoted the development of various unforeseen technologies. Although this trend continues the need for more innovation, but there is reason to believe that innovation in semiconductor laser technology is far from complete. Well-known physics can further enhance the performance of semiconductor lasers through continuous technological developments.

For example, quantum dot gain media can significantly improve efficiency over current quantum well devices. Slow axis brightness offers another order of magnitude improvement potential. New packaging materials with improved heat dissipation and extended matching will provide the enhancements needed for continuous power regulation and simplified thermal management. These key developments will provide a roadmap for the development of high-power semiconductor lasers for decades to come.

Improvements in high-power semiconductor lasers make it possible to develop downstream 30mw laser pointer technology; in the downstream laser technology, semiconductor lasers are used to excite (pump) doped crystals (diode-pumped solid-state lasers) or doped optical fibers (fiber lasers).

Although semiconductor lasers provide high efficiency, low cost laser energy sources, there are two key limitations: They do not store energy and their brightness is limited. Basically, these two lasers need to be used in many applications: one for converting electricity into a laser emission and the other for enhancing the brightness of the laser emission.

Diode-pumped solid-state lasers. In the late 1980's, the use of pumped solid-state 50mw laser pointer with semiconductor lasers started to gain popularity in commercial applications. Diode-pumped solid-state lasers (DPSSL) have dramatically reduced the size and complexity of thermal management systems (primarily recirculating chillers) and have resulted in modules that traditionally incorporate arc lamps for pumping solid-state laser crystals.

The choice of semiconductor laser wavelengths is based on their overlap with the spectral absorption characteristics of the solid-state laser gain medium; the thermal load is greatly reduced compared to the broadband emission spectrum of an arc lamp. Due to the popularity of 1064 nm neodymium-based lasers, the 808 nm pump wavelength has become the largest wavelength in semiconductor lasers for more than 20 years. Fiber lasers provide a more efficient way of converting the brightness of high power semiconductor lasers. Although wavelength multiplexing optics can convert relatively low-brightness semiconductor lasers into brighter semiconductor 10mw laser pointer, this is at the expense of increased spectral width and optical mechanical complexity. Fiber lasers have proven to be particularly effective in photometric conversion.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 25-01-2018 à 08h48

 Fiber Laser Marking Machine Detailed Alerter l'administrateur Recommander à un ami Lien de l'article 

Many people are not very understanding of the laser marking machine, it will not be clearly divided into what industries will be used, it is not clear their own industry will not be used, in fact, laser marking machine is widely used in terms of concept, useful Marking can be used to laser marking machine.

The so-called fiber green laser light marking machine is the type of marking machine using a fiber laser, fiber laser with small size (no water cooling device, the use of air-cooled), good beam quality (basic mode), maintenance-free features, mainly by the laser , Vibration lens, marking card composed of three parts, the use of fiber laser laser marking machine, the beam quality, the output center of 1064nm, the whole life of about 100,000 hours, relative to other types of laser marking life more Long, electro-optical conversion efficiency of 28% or more, relative to other types of laser marking machine 2% -10% conversion efficiency advantages, performance and other aspects of energy saving and environmental protection.

laser pointer

Equipment Features: Can be a variety of metal, non-metallic materials for processing. Especially for high hardness, high melting point, brittle material marking even more advantages. Belongs to non-contact processing, does not damage the product, no tool wear, marking quality is good. 10mw laser pointer beam fine, processing material consumption is small, processing heat-affected zone small. High processing efficiency, using computer control, easy to automate.

Widely used in IC chips, computer accessories, industrial bearings, watches and clocks, electronic and communications products, aerospace components, all kinds of auto parts, household appliances, hardware tools, molds, wire and cable, food packaging, jewelry, tobacco and military affairs and many other Field graphics and text markup, as well as high volume production line assignments.

Future advantages: the glass fiber manufacturing cost is low, the technology is mature and its optical fiber can be made of small and intensive advantages; glass fiber on the incident pump light does not require as strict crystal phase matching, which is due to The non-uniform broadening caused by the Stark splitting of the glass substrate results in a wide band of absorption; the glass material has a very low volumetric area ratio, fast heat dissipation and low loss, so the upconversion efficiency is high and the 500mw laser pointer threshold is low; Because rare earth ions are very rich in energy level and the types of rare earth ions as much.

Tunability: Due to the wide range of rare earth ions and glass fiber fluorescence spectrum wider. Because there is no optical lens in the cavity of the fiber laser, it has advantages of adjustment-free, maintenance-free and high stability, which is unmatched by traditional lasers. Optical fiber export, making the laser can easily handle a variety of multi-dimensional space for any processing applications, the mechanical system design has become very simple. Competent for poor working conditions, dust, shock, shock, humidity, temperature has a high tolerance. No thermoelectric cooling and water cooling, just a simple air-cooled. High electro-optical efficiency: The comprehensive electro-optical efficiency is as high as 20% or more, which greatly saves power consumption during operation and saves operating costs. High-power, commercial fiber lasers are six kilowatts.

Non-contact welding, and the workpiece to be welded without physical contact, thermoplastic does not occur chemical reaction, can be operated in an industrial environment, suitable for health and safety needs of the medical and food industries. Medical industry is mainly used for injection systems, medical electronic equipment, a variety of artificial implants and stoma products. powerful laser beam shape and size can be controlled, so as to control the size of heat-affected zone and joint area, high flexibility and good flexibility. Not limited to the size and shape of the parts to be welded, to achieve two-dimensional or even three-dimensional welding, to provide a basis for diversified custom parts production.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 11-01-2018 à 07h10

 High Power Laser Cutting Equipment and Technology Alerter l'administrateur Recommander à un ami Lien de l'article 

In recent years, the rapid development of high-speed rail, nuclear power, shipbuilding, petrochemical, aerospace and other fields, put forward higher demand for laser cutting processing equipment and technology, the general trend is towards higher power, faster, more and more thick format cutting section, brighter and more straight direction the development of. At present, the development of laser industry is more and more active. Fiber green laser power technology and optical components technology constantly break through. It will promote the installed power of laser cutting machine.

The laser power equipment to break the million kilowatt class, first of all need to achieve reliable and stable light source technology. In the field of laser cutting, fiber laser power coupling 12kW into 100 m, its core technology is the coupling technology, packaging technology, thermal stress, thermal management, management control and spot control spectrum, light source module currently has 500W, 700W, 1000W and 1500W, 2000 W / module will be launched recently, implementation the long-term stability of the output power by increasing the single module redundancy; TRUMPF disk lasers through power control, each module has only a 1000W. No matter what light source, the BPP value of the beam quality in the cutting process is generally not greater than 8mm mrad, and the electro-optic conversion efficiency is not less than 30%.

To solve the technical problems of the beam transmission of high power laser equipment is also very important. Due to optical processing capacity constraints, it is difficult to fabricate optical components shaping effect is good, high diffraction limit, to a certain extent, restricts the development of high power laser transmission technology, how to improve the optical surface polishing technology, optical device for high diffraction efficiency of producing ability is the future development and application of ultra high powered laser challenge. High power laser power from the fiber core 100 m diameter inner injection, its power density in general, as can be imagined, composed by the laser transmission path through the fiber end mirror, QBH or QD interface, collimation lens, zoom lens, a focusing mirror and a mirror under protection, given the ultra high power density all of the above, the optical lens on the path of cleanliness and the temperature rise of the stringent requirements, the optical path must be strictly sealed, there shall be no medium exchange with the outside world, and shall be installed in the clean room and clean optical devices, in addition the link cooling loop pressure and flow, the water inlet and the water temperature sequence and are equally important. To ensure that the temperature of cutting process remained relatively constant. Generally speaking, there must be a laser cutting knife hole, especially cutting plate materials, perforation quality is very important, good perforation is the foundation to ensure the stability of light and air, high power laser cutting, zoom perforation technology is relatively distance control beam expanding lens and a focusing lens group with servo motor, realize the change the focal spot of positive and negative defocus, cutting of stainless steel, aluminum, brass and copper and Aluminum Alloy need negative defocus, the greater thickness of negative defocus deeper.

Due to the error of material and size and other factors make optical lenses (including light window mirror, collimation mirror and a focusing mirror) has the small differences in the processing process, these errors will cause some subtle differences in different lens focus position of the same size, while the blue laser cutting machine of optical system during installation various types of optical link and adjust gas and cleanliness will also cause the focus drift, fast search and determine the focus position and the use of intelligent cutting control system can be automated, than the previous manual adjustment in two aspects of efficiency and accuracy are greatly improved. The accurate focus position is one of the key factors to realize high quality and high efficiency cutting.

The intelligent cutting control system has the function of high speed perforation, which can save energy and improve the efficiency of perforation. Perforation is the work that must be prepared before laser cutting. For the traditional timing piercing process, the efficiency and safety of some contradictions, to ensure fast and reliably complete perforation, usually in the time of perforation on the left there is a margin, but in order to prevent the molten pool in the process of perforation hole explosion and pollution will limit the power of the lens, thus affecting the efficiency of perforation, perforation. Intelligent cutting control system, due to the online monitoring and control of perforation, predict and control of various process parameters in molten pool blast hole before, the laser at full power under the condition of high speed, high quality and complete perforation, and can automatically determine the end of perforation, perforation immediately after the end of follow-up cutting, can greatly shorten the processing time, processing quality assurance, but also can greatly reduce the excess energy and due to perforation of the bed of ablation and thermal deformation effect.

Many factors affect the quality of laser cutting, in many factors, nozzle structure, auxiliary gas type, pressure and flow rate for cutting quality has important effect, especially in high power 5mw laser pointer cutting technology put forward higher requirements on the nozzle structure and related parameters. At present, the cutting nozzle with single hole type and composite type two, light hole and jet hole in cylindrical and tapered, simple processing, low production cost, but the aerodynamic performance is poor, poor gas energy, the gas loss is too large, basically meet the cutting power is less than 6kW. When the application of high power laser cutting 50mm thick stainless steel, the test results prove that the La Farge nozzle is high pressure plate structure of fast cutting optimum technology, the ultra high speed, high steady flow, and internal entrance slits cut in the cut, cut to form a stable and high quality.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 26-12-2017 à 13h00

 Marking Bathroom Products with Laser Marking Machine Alerter l'administrateur Recommander à un ami Lien de l'article 

Bathroom products, including bathroom cabinets, faucets, toilet, bathroom equipment, basin, flush valve / spool, bathroom accessories, bath and other daily health activities of space and supplies, and daily life everywhere, and people's daily life is closely related.

green laser

With the development of the national economy and people's living standards, people on the bathroom product quality requirements are getting higher and higher, sanitary products function is not just the traditional sense of the above bath function, the quality of sanitary products and appearance directly affect people's living environment Comfort. In order to product differentiation and branding, the appearance of sanitary products need to draw the pattern and LOGO and other information, and the logo and LOGO mark the accuracy will directly affect the product appearance and quality. In order to be able to give sanitary products better quality and appearance, and in order to give people a better visual enjoyment, and now a large number of bathroom products manufacturers, have chosen to use laser pointer marking machine on the appearance of sanitary products marked beautiful and exquisite designs and LOGO information.

Laser marking machine in the bathroom products processing advantages: the laser marking and the traditional standard is different from the laser marking the use of high-energy density of laser on the bathroom parts of the local irradiation, so that the surface material vaporization or color changes in the chemical reaction, leaving A method of marking a permanent mark. Is an effective means of anti-counterfeiting; laser marking machine does not produce any harmful to the human body and the environment of chemical substances, is environmentally friendly high-tech products.

Laser can be marked with a very fine light in the product material itself, high precision printing, control accuracy, clear and perfect interpretation of the print content, with strong market competitiveness, and environmental safety, without any corrosive, completely isolated The chemical pollution, for the operator is also a kind of intimate protection to ensure that the production site clean and tidy, reducing the late input, reducing the noise pollution. At the same time the current blue laser pointer equipment using computer software system to control, you can play in the bathroom products above the various text, symbols and patterns, not only easy to operate, while feature-rich, can greatly meet the rich and diverse sanitary products need to mark.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 18-09-2017 à 11h15

 Analysis on Investment Strategy of Laser Processing Alerter l'administrateur Recommander à un ami Lien de l'article 

Laser processing advantages and alternative trends are obvious, the emerging application needs to support high performance growth.

blue laser pointer

The new three-board laser business as a whole net profit nearly three years year-on-year growth of more than 40% in the new three board involved in the field of laser companies were sorted out, we found that the new three board red laser pointer business as a whole operating income and net profit to maintain high growth, Net profit since 2014 have maintained a growth rate of more than 40% in 2015 and even up to 91%, far more than the new three board mechanical plate overall growth rate. The two core drivers of future laser processing equipment are driven by the replacement of traditional processes and the emerging demand for downstream applications.

Laser processing market space is broad, the proportion of emerging applications accounted for significantly improved laser cutting equipment sales in 2015 about 6.6 billion, sales growth mainly from OLED panel cutting, 3D glass cutting and sapphire cutting and other fields; laser welding equipment sales The amount of about 2.27 billion yuan, metal frame welding, power battery welding and automotive lightweight areas such as pulling the equipment demand is a strong increase; laser marking and other laser equipment sales of about 11.9 billion yuan, the current downstream main The driving force is 3C equipment marking, OLED panel production annealing and 3D printing and other fields to stimulate the emerging application of green laser pointer equipment needs.

In 2016 the domestic laser processing equipment sales reached 25 billion yuan, according to research projections, in 2020 the laser processing market space will reach 50 billion yuan. In the domestic market, in 2015 the laser marking, cutting, welding of the three main applications accounted for 68% of sales, compared to 2005, the proportion of laser marking equipment sales there has been a significant decline from 65% to 24%, the application of new applications of laser cutting and welding equipment sales increased significantly from 28% to 44%, because the transformation and upgrading of manufacturing to increase the demand for emerging laser processing equipment.

With the "emerging applications + alternative" attributes or emerging applications leading enterprises from the industry trend to determine the demand for technology to replace the laser and laser equipment to the high intelligence, high power, reliability, low cost direction, high power fiber laser pointer, UV lasers, ultrafast lasers, etc. will become the mainstream of the development of lasers; at the same time laser processing will be the first in some emerging applications to bring the first increase in the performance of strong support for the emerging applications in the OLED panel production, smart phone parts processing, power battery production and 3D printing and laser radar and other representative areas.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 01-09-2017 à 09h24


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  Blog créé le 14-07-2016 à 11h28 | Mis à jour le 25-01-2018 à 08h48 | Note : Pas de note