An all-fiber ultrafast dissipative soliton laser at 1.3 microns based on phoshosilicate fiber doped with bismuth is presented. A nonlinear optical loop mirror containing high-germanium fiber with high nonlinearity and large positive dispersion was used. The scheme yields 11.3 ps pulses with energy of 1.7 nJ at repetition rate of 3.5 MHz. By means of bismuth-doped fiber amplifier and diffraction gratings compressor, the pulses were amplified up to 8.5nJ and compressed down to 530 fs. To achieve best results the optimal bismuth active fiber was chosen according to the investigated dependence of the gain coefficient on bismuth active centers concentration in phosphosilicate fibers.
A. M. Khegai, M. A. Melkumov, K. E. Riumkin, V. F. Khopin, F. V. Afanasiev, D. V. Myasnikov, and E. M. Dianov, "Figure-of-eight bismuth doped fiber laser operating at 1.3 microns in dissipative soliton regime," Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100830A (Presented at SPIE LASE: January 30, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2250269.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon