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Optica Publishing Group
  • CLEO/Europe and EQEC 2009 Conference Digest
  • (Optica Publishing Group, 2009),
  • paper CJ9_2

Chirped-pulse amplification of an erbium-doped fiber laser at 1.6 μm

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Abstract

Corneal surgery, among other medical applications, requires femtosecond lasers with energies at the μJ level and emitting in the water transmission window between 1.6 and 1.8 urn. We have recently investigated the chirped-pulse amplification (CPA) of an erbium-doped femtosecond fiber laser at 1.6 μm, which constitutes one of the most straightforward and efficient ways to produce energetic short pulses in this band. Recent studies demonstrated the potential of erbium-doped fiber based systems to achieve sub-picosecond pulses with tens of μJ at 1.55 urn [1]. Yet, transposing those systems to 1.6 urn is very challenging since the erbium-doped fiber small signal gain is about 5 times higher at 1.55 urn than at 1.6 urn. High gain at 1.55 μm allows the use of short fibers, leading to low nonlinear phase accumulation. On the contrary, low gain at 1.6 urn implies the use of much longer fibers [2], which decreases the maximum peak power achievable. In this work, we demonstrate for the first time to the best of our knowledge, CPA operation at 1.6 urn in erbium-doped fibers.

© 2009 IEEE

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