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Optics Letters

Optics Letters


  • Vol. 22, Iss. 14 — Jul. 15, 1997
  • pp: 1092–1094

Yb3+-ring-doped fiber for high-energy pulse amplification

J. Nilsson, R. Paschotta, J. E. Caplen, and D. C. Hanna  »View Author Affiliations

Optics Letters, Vol. 22, Issue 14, pp. 1092-1094 (1997)

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We report what is to our knowledge the first demonstration of pulse amplification in a cw-pumped fiber in which the doped gain medium has a ring shape surrounding a single-mode core. For a given pump power, ring doping reduces the gain and hence the power lost to amplified spontaneous emission. Thereby, a significantly larger amount of energy can be stored in the amplifier. Using an Yb3+-doped fiber pumped by 540 mW of power at 1000 nm, we measured 69 µJ of extracted pulse energy at 1047 nm, the highest value reported to date from a single-mode Yb3+-doped fiber. We predict that a fiber cladding pumped by a diode bar can produce pulse energies in excess of 1 mJ.

© 1997 Optical Society of America

J. Nilsson, R. Paschotta, J. E. Caplen, and D. C. Hanna, "Yb3+-ring-doped fiber for high-energy pulse amplification," Opt. Lett. 22, 1092-1094 (1997)

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