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 single. The first fiber laser was demonstrated by snitzer in 1961 2. High b rightness laser d iode m odule over 300 w with 100. In this regime, fiber devices are limited mainly in terms of peak power. Subsequently, nddoped fiber lasers were developed following the progress in bulk glasses. The many types of fiber lasers include low power continuouswave cw and low and highenergy pulsed, including. Depending on the power level and wavelength, either the airsilica interface damage threshold, the connector, or the mode stripper will be the limiting factor.
Berdine hardback textbook 436 pages 20, directed energy professional society product details. Both continuouswave cw and pulsed high power fiber laser systems constantly require technological advances. Highpower fiber laser cutting for 50mmthick cement. Briefly, we take a look at laser diode arrays for use in high power applications and finally we introduce vcsels vertical cavity surface emitting lasers. Highpower fibre lasers are in demand for industrial, defence and scientific applications. Pumping active fibers with high brightness fiber lasers instead of laser diodes is a promising solution for the brightness limitation and modal instability. On the other hand, it is wellknown that the power scaling of highpower fiber lasers based on the use of rareearth doped fibers as gain medium is limited by the presence of nonlinear effects. Ipg single mode fibre lasers have a mode field diameter of 15. Laser net, profibus, device net, ethernet, digital, analog nema 12 construction switching up to 6 way wide spread use on welding, cutting, cladding, and. Addressing the need for detailed, organized high power fiber laser technology.
Experimentally, we have realized an ytterbiumdoped fiber laser with 272 w of output power at 1080 nm, with an m 2value of 3. A particular focus is put on heating at the splice points and in the doped fiber due to the. The fiber laser s with over kilowatt are widely used for the metal cutting or welding. High power ytterbiumdoped fiber lasers fundamentals and applications article pdf available in international journal of modern physics b 2812 april 2014 with 5,592 reads how we measure. Fiber lasers have thus been the fastestgrowing segment of the laser market for the past decade. Recent development and applications of high power fiber lasers. 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. Fiber lasers can also operate over a range of wavelengths. So most highpower systems, including lockheed martins, combine beams from multiple fiber laser beam modules into a single high. It is therefore possible to use a highly controlled, lowpower laser perhaps a semiconhighpower fiber lasers physics johan nilsson and david n. Fibercoupled high power laser diodes high power laser. Amplifiers can reach comparable powers, even with singlefrequency beams. Recent development and applications of high power fiber.
Highpower fiber lasers and amplifiers are fiber lasers and fiber amplifiers with high output powers. Smart fiber lasers for high power processing swissphotonics. These lasers are watercooled and can be supplied with a builtin or standalone chiller. Highpower singlefrequency fiber lasers by weihua guan submitted in partial ful. Introducing a new generation of industrial high power fiber. 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.
A theoretical model and experimental measurements taken with a high resolution ir camera on. We consider ways to introduce a waveguide in the laser diode and concepts to make the laser diode wavelength selective. Applications include lidar, telecommunications, scientific, defence, medical and industrial. In cw regime, the ytterbiumdoped fiber laser current power performances are above 10 kw with excellent spatial beam quality 1. Symposium on high power fiber lasers and their applications 2006. High power fiber lasers and amplifiers swissphotonics. Experimental results based on rareearthdoped fibers have impressively shown that fiber lasers and amplifiers are an attractive and power scalable solidstate laser concept. 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.
Thus, there is a need for highpower handling, fewmode allfiber components with good fundamental mode transmission to transform these laboratory demonstrations into commercial products. 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. Index termsmodelocked lasers, optical frequency comb, stabilization, metrology. Schematic diagram showing the key components of a highpower laser system. Oct 20, 20 high power fibre lasers are in demand for industrial, defence and scientific applications. Hafizi2 1plasma physics division 2icarus research, inc. 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. Highpower fiber lasers for directedenergy applications.
In contrast, spectral beam combining sbc is a technique in which several individual beams with nonoverlapping optical spectra are combined to produce one highpower beam. Optical nonlinearities in high power fiber lasers and. Coherentbeamcombining forhighpowerlaserapplications. H igh power fiber lasers can be incoherently combined to form the basis of a highenergy laser system for directedenergy applications. Hajim school of engineering and applied sciences university of rochester rochester,new york 2009. High power fiber lasers emitting at 1030 nm and 976 nm e. Considering the significant practical advantages of optical fibers, this. High power fiber lasers emitting at 1030 nm and 976 nm. The main technology for high power fiber lasers, including laser diode beam shaping, fiber laser pumping techniques, and amplification systems, are discussed in detail. Fomin et al, 3 kw yb fibre lasers with a singlemode output, international. Most lasers built into consumer products are small diode lasers, while lasers for industrial applications are typically highpower gas or bulk solidstate lasers ssls. This experimental research highlights the applicability of laser cutting to cementbased materials using multimode fiber lasers.
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. Highpower fiber lasers and amplifiers rp photonics. Pdf introduction to the issue on highpower fiber lasers. High power, narrow linewdith fibre lasers with very low phase noise and rin. An optimum in optical and electronic performance is achieved. In this paper, we compare the measurements taken with ybdoped fiber lasers at power. However, despite of the attractive characteristics of fiber lasers, several problems arise when power scaling. On the other hand, fiber lasersa relatively new technology that is a subclass of solidstate lasersare growing in popularity for communications and industrial applications. Berdine hardback textbook 436 pages 20, directed energy professional society product details table of contents foreword. Introduction the field of lasers has a relatively short history starting from 1960 with maimans first demonstration of laser action in ruby 1. In this paper, we conduct a study of thermal effects in high power cw fiber lasers. In contrast, spectral beam combining sbc is a technique in which several individual beams with nonoverlapping optical spectra are combined to produce one high power beam.
An optimum in optical and electronic performance is achieved using a unique alignment of fibers from 4 m to 400 m. 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. High power fiber lasers operating near 980 nm have drawn much attention due to their potential usage as high brightness pump source for erdoped and ybdoped fiber devices 1. The laser cavity is formed by the high reflector and output coupler mirrors.
Specialty fibers for high power fiber lasers eprints soton. The number of amplification stages varies among laser designs typically between 0 and 2. Advantages of laser diodes when compared with other types of lasers. Developments in new high power fiber lasers and ultrafast.
Nov 15, 20 high power fiber lasers occupy probably the most challenging and demanding place in the whole field of fiber laser technology. 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 lasers for directedenergy applications p. Introduction to high power fiber lasers second edition. Over 1 kw of output power has now been reached with nearly diffractionlimited ytterbiumdoped fiber lasers. Singlefiber lasers cant achieve high power and beam quality. 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.
Spi lasers spi or the company we are pleased to announce that we have now commenced the manufacture of a new generation of high brightness kilowatt class cw industrial fiber. Introduction to the issue on highpower fiber lasers article pdf available in ieee journal of selected topics in quantum electronics 151. This model has been previously validated with a low power erdoped fiber laser 1 and with raman fiber lasers 2. 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. Characterization of a highpower erbiumdoped fiber laser. Schematic diagram showing the key components of a high power laser system. 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.
Many high power lasers for material processing are qswitched lasers, generating intense nanosecond pulses. 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. 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. Developments in new high power fiber lasers and ultrafast lasers. Lockheed martin shows off highpower fiber laser weapon. Introducing a new generation of industrial high power.
In the range from 405 nm to 1550 nm, these high power laser diodes deliver an optical output power from a few mw to 55 w out of the fiber. Highpower fiber lasers occupy probably the most challenging and demanding place in the whole field of fiber laser technology. Osa highpower fiber lasers based on tandem pumping. 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. Can occur when processing reflective materials like al, cu. This model has been previously validated with a lowpower erdoped fiber laser 1 and with raman fiber lasers 2. Spi lasers spi or the company we are pleased to announce that we have now commenced the manufacture of a new generation of high brightness kilowatt class cw industrial fiber lasers, with initial launch products ranging in power levels from 500w to 6kw.
Introduction to high power fiber lasers second edition r. Frequency comb stabilization of ultrafast lasers by optooptical. This highpower, highbrightness fiber laser can be used as a pump source in tandem pumping configurations for several kilowatts of power scaling. An ultralowna fiber and singletrench fiber have been proposed for mode area scaling. Recent development and applications of high power fiber lasers ipg photonics corporation grzegorz chrobak vilnius, 16 june 2014. High power fibre lasers fibre lasers laser components. The broadening of high power fiber lasers deviate from the model.
Sbc systems generally use fiber lasers as the beam source because they are robust, efficient, and compact. 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. 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. An ultralowna fiber and singletrench fiber have been proposed for mode area scaling of the fundamental mode. Jun 16, 2014 recent development and applications of high power fiber lasers ipg photonics corporation grzegorz chrobak vilnius, 16 june 2014.1118 280 1339 241 138 1378 550 250 1427 240 1568 429 945 966 594 700 907 1239 304 781 747 1509 1321 981 710 1022 426 408 1198 436 43 851 1173 582 1263 1209 1306 111 705 589 1161 610 103 394 1396