Diode lasers, laser mounts, laser stacks and laser bar arrays. Highpower singlefrequency fiber lasers by weihua guan submitted in partial ful. Use whichever laser architecture is best suited for your application. Whereas co2 and fiber lasers have long been used for welding metal parts together, there are many cases. Highpower 1018 nm ytterbiumdoped fiber laser with output of 805 w. Among fiber lasers, the demand for high output power several kw class fiber lasers is steadily increasing and is expected to grow steadily in the future. Recent development and applications of high power fiber. Since this demonstration of the potential of power scaling of fiber lasers and amplifiers with diffractionlimited beam quality using lownumerical aperture largemodearea fibers, numerous high power singletransverse mode fiber lasers have been realized by several research groups. The laser cavity is formed by the high reflector and output coupler mirrors. Ipgs ylseco lasers mark another first for the company, in providing the highest efficiency, most reliable industrial lasers available. Cw ytterbium fiber lasers are in widest use for cutting and welding. Recent development and applications of high power fiber lasers ipg photonics corporation grzegorz chrobak vilnius, 16 june 2014. Keopsys pulsed lasers are made with proven optical passive and active components to provide robust devices.
The mode instability, on the other hand, arises from quantum. Pdf dualgrating spectral beam combination of highpower. Whereas co2 and fiber lasers have long been used for welding metal parts together, there are many cases where highpower diode lasers make much more sense. 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. Fiber optic components for high power fiber laser applications. Advanced specialty fiber designs for high power fiber. Development of high powerenergy ultrafast fiber lasers for scientific research and industrial applications is one of the most exciting fields in ultrafast optics. In this paper, the theory and progress in tfb coupling are. Since this demonstration of the potential of power scaling of fiber lasers and amplifiers with diffractionlimited beam quality using lownumerical aperture largemodearea fibers, numerous high power singletransverse mode fiber lasers have been realized by several. The many types of fiber lasers include lowpower continuouswave cw and low and highenergy pulsed, including. Basics and features of highpower fiber laser semantic scholar. 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. State of the art highpower fiber laser technologies using rodtype amplifiers have reached 1 kw with 260fs pulses and made outstanding progress and delivered practical solutions for the most of these problems. High power fiber lasers and amplifiers swissphotonics.
With a wavelength of 1080 nm, these high power fiber lasers. State of the art high power fiber laser technologies using rodtype amplifiers have reached 1 kw with 260fs pulses and made outstanding progress and delivered practical solutions for the most of these problems. The average power of our fiber lasers can be continuously adjusted. All lasers in this model series deliver 1 mj of pulse energy with high power output levels across a wide frequency range. Pumping active fibers with highbrightness fiber lasers instead of laser diodes is a promising solution for the brightness limitation and modal instability. The output power of fiber lasers has increased rapidly over the last decade. 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.
It is therefore possible to use a highly controlled, lowpower laser perhaps a semiconhighpower fiber lasers physics johan nilsson and david n. However, despite of the attractive characteristics of fiber lasers, several problems arise when power scaling. However, despite of the attractive characteristics of fiber. Toward highpower nonlinear fiber amplifier high power.
Dualwavelength bidirectional pumped highpower raman fiber. Highpower double cladfiber laser beam combination technology is introduced and different kinds of fiber laser beam combination and coherent combination technologies are evaluated. Ytterbium doped allfiber integrated high power laser systems and their applications saniye sinem yilmaz m. Research on fiber laser combination is discussed briefly in this paper. Dualwavelength bidirectional pumped highpower raman. These lasers are watercooled and can be supplied with a builtin or standalone chiller. The pump light is launched into an inner cladding rather than into the much smaller fiber core, in which the laser light is generated. The raman fiber laser adopted the dualwavelength bidirectional pumping configuration, utilizing 976 nm laser diodes and 1018 nm fiber lasers as the pump sources. Power scaling of fiber lasers is challenged by several factors, such as the brightness of the pump source, the nonlinear effect, modal instability, and so on. Schematic diagram showing the key components of a high power laser system. The scienti c interest in ber lasers stems from the rich nonlinear.
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. Keopsys is the first company to introduce a mature and industrial pulsed fiber laser to industry, defense and environmental monitoring applications. Subsequently, nddoped fiber lasers were developed following the progress in bulk glasses. Tapered fused bundle tfb couplers are used in laser combine for higher power. In cw regime, the ytterbiumdoped fiber laser current power performances are above 10 kw with excellent spatial beam quality 1. Experimental data show that the linewidth broadens as a power function between 0.
Thus, there is a need for highpower handling, fewmode allfiber components with good fundamental mode transmission to transform these laboratory demonstrations into commercial products. There are two major limiting factors, namely nonlinear effects and transverse mode instability, prohibiting the power scaling capability of fiber lasers. Many high power lasers for material processing are qswitched lasers, generating intense nanosecond pulses. Introduction to high power fiber lasers second edition r. The fiber power revolution the remarkably rapid rise in continuous wave cw fiber laser output powers that. Due to their geometrically easytocool shape, both disk and fiber lasers combine highest beam quality with very high power. Rlw applications with high power fiber lasers have been introduced in 6,8. Oct 20, 20 high power fibre lasers are in demand for industrial, defence and scientific applications. Lasers with disk amplifier or fiber amplifier youre free to choose at trumpf.
Pdf high power ytterbiumdoped fiber lasers fundamentals and. 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. Advanced ultrafast fiber laser sources enabled by fiber. The high average power pulsed fibre lasers were applied for noncontact machining of aluminium alloy aa5182 in air. Different from previous techniques that aim at suppressing srs, nonlinear fiber amplifier nfa, which manipulates and employs the srs for power scaling in rareearthdoped fiber, is under intensive research in recent years. Microscope image of the rodtype photonic crystal fiber and closeup to the inner cladding and core region. This model has been previously validated with a low power erdoped fiber laser 1 and with raman fiber lasers 2. Never worry about misplacing the manual to your nkt photonics laser.
Powerline f series lasers are innovative fiber lasers with different power levels. The pulse energy is much larger than that of the 2 m singlemode fiber lasers 19, 20. Dualgrating spectral beam combination of high power fiber lasers. Pulsed fiber laser dedicated to onboard applications keopsys.
Fiber lasers have thus been the fastestgrowing segment of the laser market for the past decade. High power diode laser, including laser bar arrays, for medical, dermatology and aesthetics, material processing, printing applications, conduction and water cooling system for the laser diodes in a wide wavelength range. Introduction to high power fiber lasers second edition. There are basically two approaches to generate high power femtosecond pulses in rareearth doped fibers. The broadening of high power fiber lasers deviate from the model. Advanced specialty fiber designs for high power fiber lasers. High power clearcut grating key features unit hpcg series nm value the high power clearcut grating products are low insertion loss fiber bragg gratings for high power fiber lasers. Recently, however, fiber lasers are entering the realm of kilowatt continuous wave powers with diffractionlimited beam quality, delivering 100 w average power. Basics and features of highpower fiber laser kuniharu himeno1 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, space efficiency, stability and reliability, and is getting the major position in laser processing field. In this paper, we conduct a study of thermal effects in high power cw fiber lasers. Highpower fiber sources operating in the near and midinfrared. Basics and features of high power fiber laser kuniharu himeno1 the high power fiber laser is superior to other high power lasers with a gain medium of solid crystal or gas in all aspects such as beam quality, energy efficiency, space efficiency, stability and reliability, and is getting the major position in laser processing field. Highpower fiber laser architectures and components singlemode fiber optic components in low power fiber lasers will naturally optimize the.
The many types of fiber lasers include low power continuouswave cw and low and highenergy pulsed, including. Application of high power pulsed nanosecond fibre lasers. A simple modification of the model is proposed which fits all the experimental data. Here you can download all the recent product manuals in pdf. Application of high power pulsed nanosecond fibre lasers in. With a wavelength of 1080 nm, these highpower fiber lasers.
We discuss fundamental aspects of high power fiber lasers and describe their recent dramatic advances and prospects including our uptodate experimental results with particular attention to. The nonlinear effects, originating from high optical intensity, primarily limit the peak power scaling. The laser light can have very good beam quality even. We discuss fundamental aspects of highpower fiber lasers and describe their recent dramatic advances and prospects including our uptodate experimental results with particular attention to. In this regime, fiber devices are limited mainly in terms of peak power.
The advent of high power fiber laser has been a revolutionary force in many applications and quickly replaced other types of bulk lasers. Highpower fibre lasers are in demand for industrial, defence and scientific applications. Hajim school of engineering and applied sciences university of rochester rochester,new york 2009. 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. With afrs clearcut designing and packaging, the devices can handle more than 1. In recent years, fiber lasers have received significant attention due to their outstanding heat dissipation performance, high conversion efficiency, low pumping threshold, wide tunable range, and good beam quality, and have been rapidly developed. Laser net, profibus, device net, ethernet, digital, analog nema 12 construction switching up to 6 way wide spread use on welding, cutting, cladding, and. The broadening of highpower fiber lasers deviate from the model. Introduction the field of lasers has a relatively short history starting from 1960 with maimans first demonstration of laser action in ruby 1. Recently, however, fiber lasers are entering the realm of kilowatt continuouswave powers with diffractionlimited beam quality, delivering 100 w average power. Characterization of a highpower erbiumdoped fiber laser. 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. Highpower passive fiber components for allfiber lasers and. The purpose of this conference is to provide a technical forum for the exchange of information related to aspects of high power laser research and development, and for the discussion of latest demonstrations of laser systems in militarily relevant scenarios.
A theoretical model and experimental measurements taken with a high resolution ir camera on. The first fiber laser was demonstrated by snitzer in 1961 2. Depending on the power level and wavelength, either the airsilica interface damage threshold, the connector, or the mode stripper will be the limiting factor. The ylseco can be used in all high power application areas, including cutting, welding, brazing, cladding and surface treatment. Considering the significant practical advantages of optical fibers, this. Berdine hardback textbook 436 pages 20, directed energy professional society product details table of contents foreword.
A particular focus is put on heating at the splice points and in the doped fiber due to the quantum defect in 100w class cw fiber lasers. One is to use nonlinearity, the other is to avoid nonlinearity. In recent years, fiber lasers have received significant attention due to their outstanding heat dissipation performance, high conversion efficiency, low pumping threshold, wide tunable range, and good beam quality, and. Highpower fiber lasers and amplifiers rp photonics. High power fiber lasers have found a multitude of applications in industry thanks to their superior properties, such as exceptional high beam quality and stability, extreme power scalability.
Ytterbium doped all fiber integrated high power laser systems and their applications saniye sinem yilmaz m. Pdf on dec 1, 2015, ranjan sen and others published high power. This thus opens a potential way to achieve high powerenergy laser pulses directly from fiber lasers. The advantages of fiber lasers compactness, workers in 19874 while the later one was demonstrated by high average power, excellent beam quality, longer. In this paper, we reported both the experimental demonstration and theoretical analysis of a raman fiber laser based on a master oscillatorpower amplifier configuration.
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. Highpower fiber laser combination technology springerlink. To realize high output power fiber lasers, new technologies for rare earthdoped optical fibers, pump lasers for excitation, and transmission cables for high power laser delivery are required. In this paper, the authors will present an allround study on this new kind of high power fiber amplifier. Osa highpower fiber lasers based on tandem pumping. 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. The number of amplification stages varies among laser designs typically between 0 and 2.
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