Swiderski, J., Michalska, M., Pichola, W., Kwiatkowski, J., & Galecki, L. (2013). A 2 ?m, gain-switched Tm-doped fiber laser and amplifier system with output average power of 9 W at 50 kHz. Photonics Letters of Poland, 5(3), pp. 103–105. https://doi.org/10.4302/photon. lett. pl.v5i3.428