Alternated Q-switched and gain-switched dual-pulse Yb fiber laser with Tm-Ho co-doped fiber as saturable absorber

Generation of Q-switched and mode-locked pulses based on PbS/CdS saturable absorbers in an Er-doped fiber laser

“…When the pump power increases from 80 mW to 200 mW, the repetition rate increases from 17.3 kHz to 42.2 kHz and simultaneously the pulse duration decreases from 5.7 μs to 3.3 μs, which demonstrates a typical characteristic of a Q-switched fiber laser. 35 A maximum average output power of 6.0 mW can be achieved when the pump power is 200 mW, corresponding to a single pulse energy of 142 nJ and an optical-to-optical conversion efficiency of 3%. Notably, this is the highest pulse energy generated in a Q-switched fiber laser that uses a PbS/CdS SA.…”

Research on temperature stability of multi-segmented Nd:YAG/Nd:GdVO4 crystals laser

“…The first approach involves maintaining a constant LD operating temperature. Typically, precise control of the LD operating temperature is achieved using a large-scale chiller, effectively integrating the chiller as a substantial component of the laser system and significantly increasing the overall volume of the laser [7][8] . For LD powers not exceeding 50W, thermoelectric coolers (TECs) can be used to precisely control the LD temperature.…”