Dynamic behaviour of an Ytterbium-doped rodlike PCF laser

F. Poli; D. Passaro; A. Cucinotta; S. Selleri

doi:10.1117/12.820654

19 May 2009 Dynamic behaviour of an Ytterbium-doped rodlike PCF laser

F. Poli, D. Passaro, A. Cucinotta, S. Selleri

Proceedings Volume 7357, Photonic Crystal Fibers III; 73570D (2009) https://doi.org/10.1117/12.820654
Event: SPIE Optics + Optoelectronics, 2009, Prague, Czech Republic

Abstract

The paper presents a theoretical analysis of the dynamic characteristics of an ytterbium-doped high power fiber laser. The proposed analysis focuses on the last stage of amplification, characterized by a photonic crystal fiber. For the intrinsic characteristics of this stage, an ytterbium-doped large mode area fiber is necessary to obtain great efficiency. Photonic crystal fibers present one of the most useful option due to the good thermal properties, large mode area, high damage threshold and a high threshold for the nonlinear effect such as Raman and Brillouin scattering. The dynamic behaviour of an Ytterbium-doped rodlike photonic crystal fiber for pulsed laser is numerically investigated through a "Reservoir" model. Theoretical results demonstrate the effect of the pulse duration and the frequency repetition rate on the amplifier characteristics. Through the numerical model, the optimum length and pump power have been obtained in order to achieve high output peak power. Moreover, an analysis on the temporal evolution and shape of the signal pulses at the amplifier output is carried out by exploiting the dynamic model.

Citation Download Citation

F. Poli, D. Passaro, A. Cucinotta, and S. Selleri "Dynamic behaviour of an Ytterbium-doped rodlike PCF laser", Proc. SPIE 7357, Photonic Crystal Fibers III, 73570D (19 May 2009); https://doi.org/10.1117/12.820654

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