The singular point of the dissipative soliton mode-locked fiber laser is demonstrated experimentally. Mode-locked pulses are severely disturbed under certain pump power. The peak-valley (P-V) of the output power reaches up to 26.5% under the pump power of 918mW. However, mode-locked fiber laser can operate stably under higher or lower pump power. A numerical model based on nonlinear Schrödinger equation (NLSE) is established. And the singular point of the mode-locked state is theoretically proved.
A high average-power all-fiber supercontinuum laser source is constructed. By integrating series techniques together, the output average power achieves 65W with the spectrum range covering two octaves from 540nm to 2200nm. To our knowledge, there has been never reported similar supercontinuum source with such high average power, broadband spectrum and picosecond pulse width.
The thermal problems of CPS and YDF were studied. And the thermal management technologies are developed separately to the problems. Experimental results showed that the thermal management technologies worked well.
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