Abstract
In the last decade, laser development based on Tm and Ho doped materials in the mid-IR has made a significant progress, especially in fiber technology [1–2]. Current work focusses on Tm doped fiber broadband amplifiers at the central wavelength toward 1.95 μm with high average power and pulse duration of 141 fs [3]. Whereas purely Tm doped fibers are well suited for a center wavelength in the 1.9–2 μm range, the co-doping with Ho ions shifts the gain region to 2–2.15 μm in the water transparency window. Up to our knowledge, no broadband fiber based amplifier has been demonstrated using the advantage of Tm/Ho co-doping.
© 2013 IEEE
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