Passively Q-Switched Tm:CaGdAlO_4 laser using a Cr^2+:ZnSe saturable absorber

Diode-pumped Tm:CGA lasers at 1938 and 1854 nm are reported in continuous-wave and Q-switched regimes. For continuous-wave laser operation, the maximum output powers for the two lasers are 3.05 and 2.41 W with slope efficiencies of 33.7% and 28.5%, respectively. For Q-switching, using a Cr:ZnSe saturable absorber, the maximum average output powers reach 0.64 and 0.37 W with corresponding shortest pulse widths, maximum pulse repetition rates, maximum pulse energies and maximum pulse peak powers of (44ns, 13.9 kHz, 46 μJ, 1.04 kW) and (47 ns, 9.9 kHz, 37.4 μJ, 0.79 kW), respectively.

[1]  D. Shen,et al.  Highly efficient continuous-wave and Q-switched Tm:CaGdAlO 4 laser at 2 µm , 2017 .

[2]  Xiaodong Xu,et al.  Passively Q-Switched Tm:CaYAlO4 Laser Using a MoS2 Saturable Absorber , 2017, IEEE Photonics Technology Letters.

[3]  Xavier Mateos,et al.  SESAM mode-locked Tm:CALGO laser at 2 µm , 2015 .

[4]  Xiaodong Xu,et al.  Growth and spectra properties of Tm, Ho doped and Tm, Ho co-doped CaGdAlO4 crystals , 2014 .

[5]  P. Georges,et al.  32-fs Kerr-lens mode-locked Yb:CaGdAlO₄ oscillator optically pumped by a bright fiber laser. , 2014, Optics letters.

[6]  Chao Zhang,et al.  Wavelength switchable high-power diode-side-pumped rod Tm:YAG Laser around 2µm. , 2013, Optics express.

[7]  Patrice Camy,et al.  Tm:LiYF4 planar waveguide laser at 1.9 μm. , 2012, Optics letters.

[8]  Zhengping Wang,et al.  Efficient Tm:LuVO₄ laser at 1.9 μm. , 2011, Optics letters.

[9]  Petr Koranda,et al.  Tunable lasers based on diode pumped Tm-doped vanadates Tm:YVO4, Tm:GdVO4, and Tm:LuVO4 , 2008, SPIE LASE.

[10]  Gianluca Galzerano,et al.  Room-temperature Q-switched Tm:BaY(2)F(8) laser pumped by CW diode laser. , 2006, Optics express.

[11]  Satoshi Wada,et al.  808-nm diode-pumped continuous-wave Tm:GdVO4 laser at room temperature. , 2005, Applied optics.

[12]  Rüdiger Paschotta,et al.  Experimentally confirmed design guidelines for passively Q-switched microchip lasers using semiconductor saturable absorbers , 2001 .

[13]  D. Shen,et al.  Diode-pumped high-efficiency Tm:YAG lasers. , 1999, Optics express.

[14]  J. Didierjean,et al.  47-fs diode-pumped Yb3+:CaGdAlO4 laser. , 2006, Optics letters.