We present a widely adjustable high energy square pulse laser operating in DSR in a passively mode-locked F8L using dual Er:Yb co-doped double clad amplifiers. By manually controlling the power of each amplifier, the pulse width can be varied in a range of 360 ns without generating multi-pulsing instabilities. To ensure that DSR would dominate the modelocking mechanism, we use a 1.5 km standard single-mode fiber in the cavity. At a maximum pumping power, the laser generated square pulses with 416 ns duration and an average output power of about 1.33 W with a repetition frequency of 133 KHz corresponding to a record pulse energy of 10 μJ.
M. Salhi, G. Semaan, F. Ben Braham, J. Fourmont, F. Bahloul, and F. Sanchez, "Route to high-energy dissipative soliton resonance pulse in a dual amplifier figure-of-eight fiber laser," Proc. SPIE 10228, Nonlinear Optics and Applications X, 102280O (Presented at SPIE Optics + Optoelectronics: April 25, 2017; Published: 16 May 2017); https://doi.org/10.1117/12.2264987.
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