[5a-C14-1~8] 3.5 Laser system and materials

[5a-C14-3] Ultrafast Pulse Amplification Using Nonlinear Effects Within a Thuium-Doped Fiber

〇Yutaka Nomura^1,2, Takao Fuji¹ (1.Inst. Molecular Sci., 2.JST PRESTO)

Keywords:fiber laser, thulium, ultrashort pulses

We have developed a broadband amplifier system based on Tm-doped ZBLAN fibers. In contrast to ordinary chirped-pulse amplifiers, where gain-narrowing limits the bandwidth of the amplified spectra, broad spectra are obtained by utilizing nonlinear effects within the amplifier fiber. Output pulses with a duration of 50 fs is achieved at an average output power of 2.5 W.