Fiber Laser Systems Home Fiber Laser Systems is your best source for standard and automated fiber laser systems. We can also integrate CO2 lasers and other laser sources into our laser systems. If you looking for the latest, most reliable, and most productive laser system available, you are at the right web site and in contact with the company that can satisfy your needs.
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Fiber Laser Systems' management and engineering teams have several decades of expertise and
experience in the laser systems business. We have provided manually loaded laser marking systems, automated laser
marking systems, 2-3-and 5 axis laser welding and cutting systems, as well as "on the fly" systems. Please send
your evaluations samples and we will process them at no charge to
you. Provide us with your production requirements and other pertinent application information and we will be most
happy to submit a laser system proposal to meet your specifications. Laser Processing Lasers are ideal for cutting materials that are difficult to process on conventional metal cutting machine tools. They also provide higher process speeds for cutting holes of different sizes. Intricate cuts on wavy surfaces can be accommodated by this process. These attributes also apply to laser welding and laser marking. For most metalworking applications, there are two types of lasers used. One is fiber lasers (Ytterbium doped fiber), and the other is CO2 (carbon dioxide). Fiber lasers react better on metals and CO2 laser react better on woods, fabrics and plastics. In laser cutting the material is vaporized by the high power density of the laser beam and the debris carried away by a high pressure coaxial gas assist nozzle. Very narrow kerf widths are typical of laser cuts and are in the neighborhood of 0.010 of an inch. For welding, the laser beam is projected through a low pressure inert gas nozzle and the vaporized metal from the intensity of the laser beam is allowed to re-solidify behind the keyhole produced by the laser beam, and thus forms the weld. The depth of the weld is controlled by the power setting of the laser, the travel speed, and the beam focus setting. Laser marking on metals is best accomplished by a 20 watt pulsed fiber laser. Although the power level is fairly low the peak power of the laser pulses can be in the multi-kilowatt range. The fiber laser marking systems can engrave to depths of .005” (or deeper with multiple passes) or be adjusted to make a smooth anneal mark that just darkens the material being marked. CO2 Lasers are used for marking, engraving, and cutting wood, plastic and other organic materials. Laser cutting, welding and marking are the three big metalworking applications. There are alternate methods to do many of these applications with processes other than with lasers. So why consider lasers? Not even the most ardent supporter of laser processing would suggest that lasers can replace most other metalworking techniques. However, there are things that lasers can do better, faster and cheaper than other production methods. In the final analysis it comes down to product quality and cost effectiveness of the process. Laser Choices-Zero in on Your Laser Specifications before
Buying It will save a lot of time and effort if you determine the type of laser you need for your application before shopping around. This article will lead you through the “mysteries” of lasers to your final selection. We will not go through the technical theories of how a laser works, but what lasers are used for what applications. We will determine the proper choices for Marking, Engraving, Cutting, Welding, and Scribing. There are many types of lasers, each having different characteristics and differing interactions with various materials. We need to know the lasers output wavelength, average power, peak power, pulse rate, beam quality, and beam size. It will also help us to understand the conversion efficiency and consumable requirements of a particular laser to evaluate the operating cost. The following are the various types of lasers we will be considering for the applications I mentioned above: The CO2 Laser, with a wavelength of 10,600 nm (nanometers), reacts best with organic materials, wood, plastic, paper, glass and fabrics but can be used for metal applications at the higher power levels. With output power levels from 10-Watts to 25-Kilowatts, these lasers can be used for marking, engraving, cutting, welding and scribing. Metals are very reflective to the wavelength of CO2 Lasers and they do not work well for marking metals due to the lower power levels required for marking. CO2 Lasers can operate in the continuous wave (CW) mode or a pulsed mode. However, the peak power in the pulse mode generally never exceeds twice the CW power. The latest CO2 lasers, 10-watts to 500-watts are generally RF excited diffusion cooled and sealed units. 10-100-watt CO2 lasers are air cooled and water cooled at power levels above 100-watts. With the water cooling requirement, a refrigerated water chiller is generally necessary. A CO2 laser is approximately 10% efficient, so 90% of the input power is dissipated in heat that needs to be removed from the laser by either air or water cooling, thus further decreasing the wall plug efficiency. At power levels over 500-watts, CO2 lasers need to be provided with a laser make-up gas (the lasing medium) to maintain the output power level of the laser. This make-up gas is a consumable and adds to the operating cost. The sealed lower power CO2 lasers generally can last 3 to 5 years before needing to be recharged with gas. The “Q” Switched Nd:YAG or Vanadate Laser with a wavelength of 1,060 nm is best used for marking and scribing applications. These lasers react well with metals, ceramics, and plastics for marking applications. The average output power levels of these lasers generally range from 5-watts to 100-watts, and the newer units are diode pumped (excited) rather than flash lamp pumped. The unique feature of this Nd:YAG laser is the “Q” Switch which turns the laser beam on and off at frequencies from 1 kHz to 50 kHz. On the off cycle, the diodes continue to pump energy into the laser crystal so that when the beam is turned on again it releases a very high peak power pulse in the multi-kilowatt range. This high peak power pulse quickly breaks down the surface of the material being marked and virtually vaporizes it. These higher power pulses also help in producing a contrasting color when marking plastics. The Diode Pumped Nd:YAG lasers are generally water cooled via small refrigerated chillers to maintain laser output power stability and cool the diodes and laser rod. The solid state Nd:YAG or Vanadate laser rod (crystal) is the lasing medium and will last indefinitely if cared for properly. The laser pumping diodes will generally last from 10,000 to 20,000 hours before replacement is required. The most frequent maintenance required is a change of water, water filter, and anti-algae compound in the closed loop refrigerated chiller’s water circuit every 3 months. Laser optics will also have to be cleaned periodically. The “Q” Switched Nd:YAG and Vanadate lasers can also be frequency doubled to 532 nm (green), frequency tripled to 355 nm (ultraviolet), and frequency quadrupled to 266 nm (deep ultraviolet). The shorter the wavelength the smaller the spot size that the laser beam can be focused to. However, for each conversion to a shorter wavelength, the laser power is significantly decreased and the laser price tag is significantly increased. These shorter wavelengths are generally needed when processing micro-electronic devices that require the finest detail or resolution that can be achieved. The Pulsed Nd:YAG Laser with a wavelength of 1,060 nm is suited to intricate metal welding, cutting, and drilling applications. The average power level of these lasers range from 15-watts to 600-watts and are flash lamp pumped. The pulse rates are generally 1 to 25 pulses per second for lasers with power levels up to 50-watts and 1 to 1000 pulses per second for the highest power lasers. The main feature of the Pulsed Nd:YAG laser is its high energy per pulse which can be up to 80 joules for the highest power laser. This laser functions by using overlapping precisely controlled laser pulses to control the progression of the cut or weld, and in the case of drilling several pulses can be delivered in the same location. For cutting and drilling applications, a high pressure small orifice coaxial gas assist nozzle is used to help remove the molten material from the cut path or drill hole. In the case of welding, a larger orifice lower pressure coaxial nozzle is used to deliver a blanket of inert gas cover to the molten weld area to prevent oxidation. Because the Pulsed Nd:YAG laser uses a broad spectrum flash lamp for laser pumping (excitation), it is fairly inefficient at converting the electrical input power to laser power. It has an efficiency of approximately 3%. These lasers are water cooled at the low end via air/water heat exchangers and at the higher power levels by refrigerated chillers. The flash lamps require changing every 500 to 1000 hours of operation. Higher maintenance costs are associated with changing flash lamps, aligning and cleaning optics, and maintaining the water purity in the closed loop chiller systems. All of this said, it is still the only laser that can be used for certain applications. The Fiber Laser, with a wavelength of 1,060 nm, is the newest laser on the block. It is diode pumped and has power output levels from 5-watts to 10 plus kilowatts. From 5 to 20-watts, it can be “Q” switched for marking and scribing applications including plastics. At the higher power CW mode of operation, it can be used very effectively for metal cutting and welding applications. The beam quality of the Fiber laser is generally better than other 1,060 nm lasers so it will process parts faster for any given power level. The laser beam is delivered to the work piece via small diameter fiber cable with a focusing head so it is very flexible when trying to fit it into tight quarters or moving the laser beam at high speeds on an X-Y-Z Axis Gantry System. One laser can also share its laser beam with several workstations by switching the beam from one fiber optic cable to another. The Fiber laser has a wall plug efficiency of nearly 30%. This means it will take the least amount of electrical power to operate for any given power level. Pump diode lifetimes in excess of 100,000 hours are projected. This is truly a maintenance free laser. Fiber lasers from 5-watts to 100-watts are air cooled and over 100-watts are water cooled. Because of the higher efficiency of the fiber laser, the refrigerated chiller size can be smaller than other types of lasers operating at similar power levels. Cutting, Welding and Marking capabilities of the several laser types mentioned above:
There are many other applications that these lasers can be used for other than the ones listed above. You should now be prepared to approach either a laser manufacturer or laser systems manufacturer that produces the laser type you feel would be required for your application. Most all manufacturers will process evaluation samples at no charge to verify the results you are looking for. Other information that they will need is your desired production rate, your part handling preferences, and automation required. If you have any of the applications below please contact us for further information: Laser Engraving, Laser Marking, Laser Cutting Wood, Laser Cutting Fabric, Laser Cutting Cloth, Laser Cutting Leather, Laser Cutting Acrylic, Laser Cutting Acrylic Mirror, Laser Cutting Plastic, Laser Cutting Metal
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