We report a continuous wave (CW) all-solid-state Cr:LiSAF laser with a prism-controlled coupled-cavity. Broad-band tuning of 198 nm from 784 nm to 982 nm is demonstrated. The output power is always above 14 mW tuned from 825 nm to 975 nm and reaches the maximum value of 21.4 mW at 900 nm. Dual-wavelength operation is observed at the edge of the tuning range. The coupled-cavity passive loss is discussed and calculated to be 18%.
We report on the recent progress on high power pulsed 2.8 μm Er3+-doped ZBLAN fiber laser through techniques of passively and actively Q-switching in our research group. In passively Q-switched operation, a diode-cladding-pumped mid-infrared passively Q-switched Er3+-doped ZBLAN fiber laser with an average output power of watt-level based on a semiconductor saturable absorber mirror (SESAM) was demonstrated. Stable pulse train was produced at a slope efficient of 17.8% with respect to launched pump power. The maximum average power of 1.01 W at a repetition rate of 146.3 kHz was achieved with a corresponding pulse energy of 6.9 μJ. The maximum peak power was calculated to be 21.9 W. In actively Q-switched operation, a diode-pumped actively Q-switched Er3+-doped ZBLAN fiber laser at 2.8 μm with an optical chopper was reported. The maximum laser pulse energy of up to 130 μJ and a pulse width of 127.3 ns at a repetition rate of 10 kHz with an operating wavelength of 2.78 μm was obtained, yielding the maximum peak power of exceeding 1.1 kW.
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