- Fiber disk laser
A fiber disk laser is a
fiber laserwith transverse delivery of the pump light. They are characterized by the pump beam not being parallel to the active core of the optical fiber(as in a double-clad fiber), but directed to the coil of the fiber at an angle (usually, between 10 and 40 degrees). This allows use of the specific shape of the pump beam emitted by the laser diode, providing the efficient use of the pump.
Fiber disk lasers should not be confused with the
laser disks (disk-shaped devices for storage and reading of information with laser beam) nor the disk laseror "active mirror", which is a laser with a thin active layer where the heat sink is realized in a direction opposite to that of propagation of the output beam.
Realizations of fiber disk lasers
First disk lasers were developed in the
Institute for Laser Science, Japan.Several realizations of fiber disk lasers were reported.cite journal| url=http://www.maik.ru/cgi-bin/search.pl?type=abstract&name=lasphys&number=3&year=98&page=774
author=K. Ueda| coauthors=A. Liu
title=Future of High-Power Fiber Lasers
journal=Laser Physics| volume=8| pages=774–781| year=1998] cite journal
title=Scaling physics of disk-type fiber lasers for kW output
journal=Lasers and Electro-Optics Society
year=1999] cite journal
journal= Lasers and Electro-Optics Society 1999 12th Annual Meeting. LEOS '99. IEEE
coauthors= Sekiguchi H., Matsuoka Y., Miyajima H. , H.Kan
title=Conceptual design of kW-class fiber-embedded disk and tube lasers
pages=217-218] cite journal
journal=Nature Photonics sample
title=The Fiber Disk Laser explained
volume=sample] The fiber disk laser is so named because the fiber is tightly coiled. Typically, no special feedback for the laser frequency is required, as the small reflection at end of the fiber is sufficient to provide efficient operation. In this case, both ends of the coiled fiber can be used as output.
Application and power scaling
Fiber disk lasers are used for cutting of metal (up to few mm thick),
weldingand folding. The disk-shaped configuration allows efficient heat dissipation (usually, the disks are cooled with flowing water)); allowing power scaling. When the increase of the length of the fiber becomes limited by stimulated scattering, additional power scaling can be achieved by combining several fiber disk lasers into a stack.
The spiral-coiled configuration is not the only possible arrangement; any other scheme of stacking of optical fibers with lateral delivery of pump can also be called a fiber disk laser, even if the resulting shape of the device is not circular. The term "fiber disk laser" applies to the concept of lateral delivery of pump to the active optical fiber rather than specifically to a disk-shaped device. The optimal shape of the fiber disk laser may depend on the properties of the beam of pump available, as well as on the specific application.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Disk laser — Not to be confused with Laserdisc. Fig.1. An optically pumped disk laser (active mirror). A disk laser or active mirror (Fig.1.) is a type of solid state laser characterized by a heat sink and laser output that are realized on opposite sides of a … Wikipedia
Fiber laser — A fiber laser or fibre laser is a laser in which the active gain medium is an optical fiber doped with rare earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, and thulium. They are related to doped fiber amplifiers,… … Wikipedia
Laser — For other uses, see Laser (disambiguation). United States Air Force laser experiment … Wikipedia
Laser beam welding — (LBW) is a welding technique used to join multiple pieces of metal through the use of a laser. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. The process is frequently used in high volume… … Wikipedia
Laser beam profiler — A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers ultraviolet, visible, infrared, continuous… … Wikipedia
Laser Doppler Vibrometer — A Laser Doppler Vibrometer (LDV) is a scientific instrument that is used to make non contact vibration measurements of a surface. The laser beam from the LDV is directed at the surface of interest, and the vibration amplitude and frequency are… … Wikipedia
Institute for Laser Science — The Institute for Laser Science is a department of the University of Electro Communications, located near Tokyo, Japan.LocationThe Institute for Laser Science is located at 1 5 1 Chofugaoka, Chofu, Tokyo, 182 8585, Japan. The coordinates are (+35 … Wikipedia
Vertical-cavity surface-emitting laser — The vertical cavity surface emitting laser (VCSEL; [v ɪxl] ) is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge emitting semiconductor lasers (also in plane lasers)… … Wikipedia
Solid-state laser — A solid state laser is a laser that uses a gain medium that is a solid, rather than a liquid such as in dye lasers or a gas as in gas lasers. Semiconductor based lasers are also in the solid state, but are generally considered as a separate class … Wikipedia
Power scaling — of a laser is increasing its output power without changing the geometry, shape, or principle of operation. Power scalability is considered an important advantage in a laser design.Usually, power scaling requires a more powerful pump source,… … Wikipedia