These lasers are watercooled and can be supplied with a builtin or standalone chiller. Zervas and others published high power fiber lasers. Since this demonstration of the potential of power scaling of fiber lasers and amplifiers. The laser light can have very good beam quality even. The lasers are available with a wide variety of fiber terminations, collimation. Hajim school of engineering and applied sciences university of rochester rochester,new york 2009. Pdf on dec 1, 2015, ranjan sen and others published high power fiber lasers. Tapered fused bundle tfb couplers are used in laser combine for higher power. Highpower fiber lasers and amplifiers rp photonics. A fiber pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mw. Fibercoupling technique for highpower diode laser arrays article pdf available in proceedings of spie the international society for optical engineering 3267. Laser cleaning of metal, cement etc high power single mode. The rise in output power from rareearthdoped fiber sources over the past decade, via the use of claddingpumped fiber architectures, has been dramatic, leading to a range of fiber based devices with outstanding performance in terms of output power, beam quality, overall efficiency, and flexibility with regard to operating wavelength and radiation format.
Jul 10, 2009 research on fiber laser combination is discussed briefly in this paper. Berdine hardback textbook 436 pages 20, directed energy professional society. Using a long fiber length, which forced a large threshold for the i75i85 transition, a wavelength of 3. Depending on the power level and wavelength, either the airsilica interface damage threshold, the connector, or the mode stripper will be the limiting factor. Abstract highpower fiber laser has been emerged great potential in a wide range of applications and becomes a robust candidate for high. Hence, high power fiber lasers have been developed significantly and presented in many excellent articles 1, 2, 4, 39 48. Highpower fiber lasers and fiber amplifiers are nearly always realized with rareearthdoped doubleclad fibers, which are pumped with fibercoupled highpower diode bars or other kinds of laser diodes. High power fiber lasers can also have applications in the area of power beaming, e. Highpeakpower fiberlaser technology for laserproduced. The broadening of highpower fiber lasers deviate from the model. The ffc allows easy exchange of process fibers on site. Introduction high power cw laser sources with hundreds of watts up to several kilowatts are required for different industrial application such as. Blairb anasa goddard space flight center, greenbelt, md, usa 20771. Highpower fiber laser architectures and components singlemode fiber optic components in low power fiber lasers will naturally optimize the transmission in the fundamental mode.
These fiber coupled laser systems have an integrated laser diode, fiber coupled optics, power supply, ld current control power output, and temperature control all in one box. Highpower fiber laser combination technology springerlink. Larger image back cover introduction to high power fiber lasers second edition r. The first rareearthdoped fiber lasers were operated in the early sixties, and produced a few milliwatts at a wavelength around one micron. Rp photonics encyclopedia highpower fiber lasers and. Their compact dimensions and convenient functions such as power adjustment, temperature control, led display, etc. Tailored for high performances, our infrared ir lasers and visible vis lasers all feature high power, ultralow noise, single frequency, single mode, excellent power and pointing stability. High power fiber lasers emitting at 1030 nm and 976 nm. The laser cavity is formed by the high reflector and output coupler mirrors. Doctor of philosophy electrical engineering in the university of michigan. Innovation in high power fiber laser applications article pdf available in proceedings of spie the international society for optical engineering 8237. High power fiber lasers and amplifiers swissphotonics.
The laser diode is optically coupled to an smf fiber pigtail that includes a bragg grating to stabilize wavelength over a variety of operating conditions. The fc series cover the lower power ranges and have a choice of fiber core diameters. Pdf fibercoupling technique for highpower diode laser arrays. Lockheed martin shows off highpower fiber laser weapon. H igh power fiber lasers can be incoherently combined to form the basis of a high energy laser system for directed. High power, narrow linewdith fibre lasers with very low phase noise and rin. It integrated water cooler, modulation, protection electronics in a compact package. The broadening of high power fiber lasers deviate from the model.
The highpower fiber laser is superior to other highpower lasers with a gain medium of solid crystal or gas in all aspects such as beam quality, energy efficiency. This model has been previously validated with a low power erdoped fiber laser 1 and with raman fiber lasers 2. Characterization of a highpower erbiumdoped fiber laser. The laser performance demonstrates a high laser slope efficiency of 81. These 1550nm fiber lasers are offered with either 5 watts or 10 watts of cw ex fiber output power. Nowadays, fiber lasers have emitted kilowatt power, and generally high power fiber lasers and. High power laser assemblies fiber optics solutions. Highpower double cladfiber laser beam combination technology is introduced and different kinds of fiber laser beam combination and coherent combination technologies are evaluated. Highpower fibre lasers are in demand for industrial, defence and scientific applications.
The construction of a high power fiber laser josias j. It is therefore possible to use a highly controlled, lowpower laser perhaps a semiconhighpower fiber lasers physics johan nilsson and david n. H ighpower fiber lasers can be incoherently combined to form the basis of a highenergy laser system for directed. Each coupled laser can be controlled independently and whole light source can be operated in cw mode or internalexternal modulated mode. Fiber lasers possibly defy the common wisdom in the past by realizing excellent quality welding. Experimentally, we have realized an ytterbiumdoped fiber laser with 272 w of output power at 1080 nm, with an m 2value of 3. The pump light is launched into an inner cladding rather than into the much smaller fiber core, in which the laser light is generated. Highlight flseries separate process fibers, thus allowing time or energy sharing amongst four workstations with a single laser. Le roux, johan meyer department of electrical and electronic engineering university of johannesburg, p. In cw regime, the ytterbiumdoped fiber laser current power performances are above 10 kw with excellent spatial beam quality 1. The scw 1732bgr laser diode module is a high power 1650 nm rwg fp laser diode packaged in a 14 pin butterfly package. Always exercise great caution when using any highpower. The additional power and better beam quality decrease gap of target materials and provide cleaner welding lines and faster speeds.
Flat tip scope must be straightened to avoid scope damage tractip fiber can be advanced in. Modelock systems 9blue light 9high brightness pumping of ybdoped materials outline 22. At an overall launched pump power of 700 w we reached an output power of 485 w without any degradation and a nearly diffractionlimited beam quality out of a 25 m core. Addressing the need for detailed, organized high power fiber laser technology in single work for use in education, research and industry, the authors present a collection of information from hundreds of research publications arranged it in a logical format. The outstanding performance of fiber lasers and their attractive advantages, including excellent beam quality, compactness, high transmission efficiency, and low maintenance, have facilitated extensive applications of fiber lasers in industry, biology, medicine, and other areas. Development status of high power fiber lasers and their coherent. A fiber laser or fibre laser in british english is a laser in which the active gain medium is an optical fiber doped with rareearth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, thulium and holmium. Pdf innovation in high power fiber laser applications. In this system, the pump power was combined using a 19. Here you will find readyto use diode laser systems. Fiber lasers have thus been the fastestgrowing segment of the laser market for the past decade. High power laser assemblies continuous wave cw lasers the following chart shows the maximum power that can be used for various fiber core sizes at common cw laser wavelengths.
Azurlight systems is a supplier of high power fiber lasers and amplifiers. Highpeakpower fiberlaser technology for laserproducedplasma extremeultraviolet lithography by kaichung hou a dissertation submitted in partial ful. A y mmdiameter and x mmlong quartz rod is fused to the fiber facet for beam expansion while preserving minimal beam distortion. High power double clad fiber laser beam combination technology is introduced and different kinds of fiber laser beam combination and coherent combination technologies are evaluated. A full front panel with lcd menu driven display and a remote interface make this unit is highly flexible for many research and testing applications.
Yls high power fiber lasers power levels from 1kilowatt to 100 kilowatts single mode to 3 kilowatts available low order mode to 50kw water cooled industrial interface. In this paper, the theory and progress in tfb coupling are. This experimental research highlights the applicability of laser cutting to cementbased materials using multimode fiber lasers. Fiber optic cables for transmission of highpower laser pulses. The rise in output power from rareearthdoped fiber sources over the past decade, via the use of claddingpumped fiber architectures, has been dramatic, leading to a range of fiberbased devices with outstanding performance in terms of output power, beam quality, overall efficiency, and flexibility with regard to operating wavelength and radiation format. Highpower passive fiber components for allfiber lasers. Schematic diagram showing the key components of a highpower laser system.
Basics and features of highpower fiber laser semantic scholar. Ipg photonics is the worlds leading provider of high power fiber lasers and fiber amplifiers that are revolutionizing performance and utility in a remarkable array of materials processing, micromachining, telecommunications, medical and other advanced applications. Highpower singlefrequency fiber lasers by weihua guan submitted in partial ful. The mo a combination of ge fanuc optional heavy duty industrial motion systems and revolutionary fiber laser technology offer an easytouse. Subsequently, nddoped fiber lasers were developed following the progress in bulk glasses. The modules include a thermoelectric cooler and an electrically. Osa highpower diodepumped fiber laser operating at 3. Considering the significant practical advantages of optical fibers, this development is likely to profoundly affect laser technology and stimulate the use of lasers in a range of practical applications.
Alignment of the fiber to the optical injection system will play a large role in how the light travels down the fiber. They are related to doped fiber amplifiers, which provide light amplification without lasing. Research on fiber laser combination is discussed briefly in this paper. A fiberpigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mw. However, high power fiber devices are very often built as laser amplifier combinations, i.
Lasercuttingtoolincreasesthroughputatadvancedlaserwaterjetcutting. So most highpower systems, including lockheed martins, combine beams from multiple fiber laser beam modules into a single high. Hafizi2 1plasma physics division 2icarus research, inc. Oct 20, 20 high power fibre lasers are in demand for industrial, defence and scientific applications. There is intrinsically a new level of complexity in designing and handling a fewmode core, where even a splice can create higher order modes. High power fiber coupled diode laser systems information. The first fiber laser was demonstrated by snitzer in 1961 2. Highpower fiber sources operating in the near and midinfrared. In this paper, we compare the measurements taken with ybdoped fiber lasers at power levels ranging from a few watts to hundreds of watts with the model. The conceptually simplest option for generating high power laser light is to build a fiber laser directly with some kind of mirrors on both ends. Introduction the field of lasers has a relatively short history starting from 1960 with maimans first demonstration of laser action in ruby 1.
Ipgs high power cw fiber lasers cover output power range from 1 kw to over 100 kw and feature a wide range of operating wavelengths, singlemode and multimode options, high stability and extremely long pump diode lifetime. The high power fiber laser is a water cooling stabilized semiconductor laser integrated several multimode fibers. High power fiber lasers and high power fiber amplifiers with exceptional build quality and reliability. Compact highpower single or multimode fiber lasers singlemode compact lasers offer output powers from 1 to 2. Gragg also notes that when considering the purchase of another laser cutter, he preferred the meta 10c, based on a 1 kw co2 laser, over a fiber laserbased machine. Schematic diagram showing the key components of a high power laser system. Fiber nonlinearities, such as stimulated raman scattering or fourwave. Introduction to high power fiber lasers second edition.
A full front panel with lcd menu driven display and a remote interface make this unit is highly flexible for. Fiber endcap is designed for output termination of high power fiber laser and fiber amplifier to reduce the power density at output fiber facet. High power fiber laser architectures and components singlemode fiber optic components in low power fiber lasers will naturally optimize the transmission in the fundamental mode. Highpower fiber lasers for directedenergy applications. Laser net, profibus, device net, ethernet, digital, analog nema 12 construction switching up to 6 way wide spread use on welding, cutting, cladding, and. Developments in new high power fiber lasers and ultrafast. Singlefiber lasers cant achieve high power and beam quality.
Highenergy femtosecond ybdoped dispersion compensation free fiber laser, optics express, vol. Pdf longterm operation of highpower 3 m fiber lasers. The increase of output power has allowed the achievement of fiber lasers operating either in high power continuous wave cw regime, or in qswitch or modelocked regimes with even increasing pulse energies. In such systems, peak power and average power levels are. High power cw fiber laser, multimode fiber, single mode operation, splicing, mode matching, high numerical aperture fiber, fiber bragg grating 1. Recent advances in fiber and laser diode technologies have led to kilowattpower fiber lasers with output beams of single transverse mode quality. The most promising technology for high power continuous wave laser systems is the fiber laser technology, which offers better size, weight, and power compared with bulk crystalline or chemical lasers. The number of amplification stages varies among laser designs typically between 0 and 2. The i65i75 and i75i85 laser transitions produced 0. This model has been previously validated with a lowpower erdoped fiber laser 1 and with raman fiber lasers 2.
All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use. Special attention is placed on pump combination techniques and the parameters that affect the brightness enhancement observed in. While the fiber laser generally delivers a thinner cut width, we can generally achieve the. The fcw series cover the higher power ranges and are only available with a 400m fiber core diameter.
Simple design for singlemode high power cw fiber laser. Pdf recent progress in highpower fiber lasers for high. Details of high power laser injection into fibers is beyond the scope of this paper but has been covered in several other sources. The many types of fiber lasers include low power continuouswave cw and low and highenergy pulsed, including. A cladding light stripper is built inside in order to remove the reflection power in the fiber inner cladding. Recent advances in fiber and laser diode technologies have led to kilowatt power fiber lasers with output beams of single transverse mode quality. The lasers stand out due to low operating current, precise optical power control, simple driver design, and high lifetime. These 1550nm fiber lasers are offered with either 5 watts or 10 watts of cw exfiber output power. High power pulsed lasers are commonly deployed in harsh environments, like. Highpower fiber laser cutting for 50mmthick cement. We believe these are the highestpower ytterbium and erbiumytterbium fiber lasers ever reported. Single fiber laser welder is able to cover various processing needs so as to decrease the number of operation processes.
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