Distributed Model for Actively Q-Switched Erbium-Doped Fiber Lasers

作者：Kolpakov Stanislav A^*; Barmenkov Yuri O; Dinora Guzman Chavez Ana; Kir'yanov Alexander V; Luis Cruz Jose; Diez Antonio; Andres Miguel V

来源：IEEE Journal of Quantum Electronics, 2011, 47(7): 928-934.

DOI：10.1109/JQE.2011.2143695

• Active Q-switch
• distributed model
• erbium-doped fiber laser
• excited state absorption
• self-mode-lock

A distributed laser model is applied to explain the multi-peak shape of the pulses generated by the actively Q-switched erbium-doped fiber laser. In the model, all kinds of intra-cavity losses are taken into account, including the point losses produced by fiber splices and intra-cavity elements, and the distributed loss, such as the active fiber background loss and the loss caused by excited state absorption inherent in erbium-doped fibers. The model also takes into account the exact function that describes the switching dynamics of the Q-switch modulator. We show that the distributed model allows an accurate simulation of the laser pulse shape and energy, providing therefore a good agreement with the experimental results. The origin of a multi-peak pulse shape frequently observed in QS-EDFL and some other features that result from the model are discussed.

• 出版日期2011-7