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Single transverse mode Yb-doped fiber laser exceeding 800 watts of output power

: Ehlers, B.; Heinemann, S.; Doerfel, F.; Liu, C.H.; Galvanauskas, A.

Patel, R.:
Laser Materials Processing Conference, Laser Microfabrication Conference, ICALEO 2004, 23rd International Congress on Applications of Lasers & Electro-Optics. Congress proceedings. CD-ROM : October 4 - 7, 2004, San Francisco Airport Marriott, San Francisco, California, USA
Orlando, Fla.: LIA, 2004 (LIA publication 597 = 97)
ISBN: 0-912035-77-3
ISBN: 978-0-912035-77-2
Laser Materials Processing Conference <2004, San Francisco/Calif.>
Laser Microfabrication Conference <2004, San Francisco/Calif.>
International Congress on Applications of Lasers and Electro Optics (ICALEO) <23, 2004, San Francisco/Calif.>
Conference Paper
Fraunhofer ILT ()

High power fiber-coupled diode laser modules have been developed for pumping of fiber lasers and fiber amplifiers. Each of the laser modules provides up to 500 Watts of output power operating at one wavelength. Spectral beam combining of these pumps scales the power into the kilowatts out of one multimode fiber. Several of these fiber-coupled pumps are spectrally combined and used for two-sided pumping of Yb-doped fiber lasers. A large mode area double clad fiber is used with a core diameter of 20 micrometer core. This set-up produces a near diffraction limited fiber laser output of more than 800 watts. Mode discrimination is achieved by coiling of the active fiber.