Very long fiber laser is doped double-clad fiber, and high reliability, multi-mode, single emitter laser diode component, the outsourcing of semiconductor lasers for the fiber layer to provide pump light. These single light-emitting diode structure of the life of the structure above the clause rows 10 to 100 times the semiconductor diode, is reliability and maintenance-free operation of the key. At present, the reliability of the design based on the same communications products used in semiconductor pump laser in 5W, 25 degrees room temperature test shows MTBF exceeds 200,000 hours. In addition, the same power with other types of single mode (TEM00) laser, fiber laser has unique advantages, especially in industrial applications. Include: wall plug (power) efficiency, compact design, easy to light transmission and cooling systems integration and provide up to 10,000 hours continuously without any artificial light out of custody, maintenance-free operation.
Fiber consumption is equivalent to only 1% of light energy required to pump laser, while the efficiency of the semiconductor pump solid state lasers (Nd laser system), more than double. Higher efficiency, longer life, less maintenance make fiber lasers combine the cost of the owners are very attractive to the rich. Fiber lasers that require high beam quality near-infrared laser applications come in handy. They will focus on a small spot, high power density has a special interest, such as desktop production. A bunch of 100W laser output beam can be focused to 5um so small, which is equivalent to the brightness is 109W/cm2. Now the application of fiber laser positioning include: selective soldering, marking, various art imaging, annealing, micro-mechanical devices bending, 1 ~ 2mil stainless steel parts cutting applications.
Marking Applications
Fiber laser marking system footprint is small, and completely maintenance-free. Remarkable quality mode fiber laser suitable for applications in high precision marking. Collimated beam device with single-mode fiber and integrated optical focusing system provides easy to integrate up to 7m away from the beam transmission system.
A fiber laser marking system can be one or two 25W power fiber lasers, one or two used to guide light to the workpiece on the scanning head and a computer controlled scanning head of the industrial component. This design than a 50W laser beam to scan the head of two ways up to 4 times higher than the efficiency. The system has a maximum marking area is 175x295mm, spot size is 35um, marking the full range of absolute positioning accuracy is + /-100um. 100mm working distance of the focusing spot can be as small as 15um. Retraction of the manual zoom optical system needs the focused spot can be extended to move the head without 150um.
Material handling applications
Fiber laser materials processing is based on the site of laser energy absorbing material is heated in the heat treatment process. 1um wavelength of laser light so easily be metal, plastic and ceramic material absorption.
With a 25W fiber laser to 150mm/Sec stainless steel sculpture at the speed of characters and trademarks. Thin stainless steel foil can be used to 750mm/sec 15W fiber laser engraving pace. Treated anodized aluminum carved by the 25W laser power after the show a very high contrast. Here, the laser energy deposition in the above only the colored thin coating "blow" away the exposed metal blank below. Another sophisticated application layer is used to remove high-energy density laser marking car launch board or electronic keyboard in the handle and backlit buttons. Here, the high focus on performance for this type of high-precision coating layer of material removal applications.
Compared to the typical Q-lamp pumped solid state laser systems or semiconductor pump "non-compliance" marking, made of continuous fiber laser marking system, widely used in the "invasion" of marking the. This film on the semiconductor package marking is very important. Q-solid-state laser will likely produce "inconsistent" and marking the depth and width; And, because the traditional Q-switched lasers and short pulse high-energy defects, marked effect may be deformed, such deformation may lead to micro-fracture, thereby endangering parts of the life and performance. To do with the continuous fiber laser tag simply does not have distortion.
Application of bending
Fiber laser forming or bending is used to change the curvature of sheet metal or hard ceramic technology.
Centralized heating and cooling rapidly from the cut resulted in laser heating region, plastic deformation, permanent change in the curvature of the workpiece target. Study found that treatment with laser micro-bending than the other way with higher precision, at the same time, which in microelectronics manufacturing is a very good way.
Continuous fiber laser for the hard disk drive industry in the 24 / 7 production environment provides a high-performance and highly reliable tool to accurately bend the semiconductor, ceramic and metal components. Fine control of the fiber laser beam to meet the needs of disk drive manufacturers, for a series of smaller devices provide more accurate and repetitive performance of bending methods. Other benefits include in the production process does not require protection or supplies, making production investment of the smallest.
The application of laser cutting
In the medical equipment industry, laser microdissection is huge. Currently this area is mainly used for low-light pump solid-state lasers. However, in order to meet the growing demand for higher yields, laser reliability and fewer maintenance requirements manual, on whether to retain this traditional laser systems to suit the production environment of modern industrial applications has posed a severe challenge. Fiber laser, turned and given to a number of advantages to maintain high growth and high yield. Single-mode fiber laser without focusing mirror, no longer need to flash the replacement, completely maintenance-free, compact air-cooled design but also save the expensive ultra-clean factory space.
With the rising power of fiber lasers, fiber laser cutting aspects of industrial scale to be applied. For example: quick chopper with a continuous stainless steel fiber laser microdissection artery tube it clear this is an excellent micro-cutting tools. In the cutting experiment, the simple pump diode excitation chopping frequency allows up to 3000HZ. Because of its high beam quality, fiber laser can get a very small focus diameters and the resulting small kerf width is to refresh the medical device industry standard today.
Summary:
Fiber laser, a compact, air-cooled, "embedded" devices, suitable for nearly all of the production line, and has lasted for many years without replacement parts and maintenance design features. Beam focused to provide high performance ultra-high power density makes the effective working distance of where to enjoy a wider range of applications.
However, these lasers the most exciting prospect is his inherent light, and modular concept of the modern fiber laser brings considerable cost savings. As the market demand growth and streamlined production process, semiconductor pump laser and optical components will greatly reduce production costs, will make the cost of fiber laser with equivalent lower cost compared to traditional laser systems.