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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 14420–14425

Nanosecond vortex laser pulses with millijoule pulse energies from a Yb-doped double-clad fiber power amplifier

Mio Koyama, Tetsuya Hirose, Masahito Okida, Katsuhiko Miyamoto, and Takashige Omatsu  »View Author Affiliations

Optics Express, Vol. 19, Issue 15, pp. 14420-14425 (2011)

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Nanosecond vortex pulses were generated using a stressed, large-mode-area, Yb-doped, fiber amplifier with an off-axis coupling technique for the first time. A pulse energy of 0.83 mJ (corresponding to a peak power of 59 kW) was achieved at a pump power of 25.7 W. The optical-optical efficiency was measured to be 31%. The millijoule nanosecond vortex pulses will be potentially applied to novel material processing, such as metal microneedle fabrication.

© 2011 OSA

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(320.4240) Ultrafast optics : Nanosecond phenomena
(080.4865) Geometric optics : Optical vortices

ToC Category:
Ultrafast Optics

Original Manuscript: May 19, 2011
Revised Manuscript: June 23, 2011
Manuscript Accepted: June 26, 2011
Published: July 12, 2011

Mio Koyama, Tetsuya Hirose, Masahito Okida, Katsuhiko Miyamoto, and Takashige Omatsu, "Nanosecond vortex laser pulses with millijoule pulse energies from a Yb-doped double-clad fiber power amplifier," Opt. Express 19, 14420-14425 (2011)

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