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Published on: November 22, 2019
Passively cascade-pulsed erbium ZBLAN all-fiber laser
Tzong-Yow Tsai1, Yen-Cheng Fang, Hong-Xi Tsao
1Lasers and Photonics Laboratory, Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, No. 1 University Rd., Tainan City 70101, Taiwan. tzongyow@mail.ncku.edu.tw
Abstract:
We propose and numerically demonstrate a cascade pulsing mechanism in a CW-pumped Er³⁺:ZBLAN all-fiber laser system. In the design, the laser was pumped at 980 nm and passively Q-switched at 1.6 μm. The Q-switched resonance reduced the population on ⁴/13/2 of the erbium gain fiber, thereby creating a population inversion between the levels of 4/11/2 and ⁴/13/2, and instantly inducing an intense gain-switched pulse at 2.7 μm. Sequential 2.7-μm single-mode pulsing with a pulse energy of 170 μJ and a peak power of 6 kW was achieved with an absorbed pump power of 0.65 W.
