Diode end-pumped passively Q-switched Tm:YAP laser with 1.85-mJ pulse energy.

Passive Q switching of a Tm:YAP solid-state laser at 1935 nm with Cr:ZnSe and Cr:ZnS polycrystalline saturable absorbers is demonstrated for the first time, to the best of our knowledge. With Cr:ZnS, a maximum pulse energy of 1.85 mJ is obtained for a pulse duration of 35.8 ns, resulting in a peak power of 51.7 kW. With Cr:ZnSe, the achieved pulse energy of 1.55 mJ with a pulse duration of 42.2 ns leads to 36.7-kW peak power. These high pulse energies, together with the unique lasing wavelength at 1935 nm, make this laser a promising tool for biomedical and microsurgery applications.

[1]  Baoquan Yao,et al.  InGaAs/GaAs saturable absorber for diode-pumped passively Q-switched dual-wavelength Tm:YAP lasers. , 2010, Optics express.

[2]  Xavier Mateos,et al.  Passively Q-switched Tm:YLF laser. , 2012, Optics letters.

[3]  Y. Leng,et al.  Compact passively Q-switched Tm:YLF laser with a polycrystalline Cr:ZnS saturable absorber , 2014 .

[4]  Jun Xu,et al.  Performance of 2 μm Tm:YAP pulse laser based on a carbon nanotube absorber , 2012 .

[5]  L. Su,et al.  Study on characteristics of diode-pumped continuous-wave tunable and passively Q-switched Tm:SSO laser , 2014 .

[6]  Jingliang He,et al.  Passively Q-switched 2 μm Tm:YAP laser based on graphene saturable absorber mirror. , 2014, Applied optics.

[7]  F. Zhou,et al.  High efficient continuous wave operation of diode-double-passing-pumped Tm:YAP laser , 2011 .

[8]  Yonggang Wang,et al.  2 μm passive Q-switched mode-locked Tm3+:YAP laser with single-walled carbon nanotube absorber , 2012 .

[9]  Mauro Tonelli,et al.  Compact passively Q-switched diode-pumped Tm:LiLuF4 laser with 1.26 mJ output energy. , 2012, Optics letters.

[10]  Alexander M. Malyarevich,et al.  Compact passively Q-switched diode-pumped Tm:KY(WO4)2 laser with 8 ns/30 μJ pulses , 2012 .

[11]  M. Birnbaum,et al.  Q-switched 2-µm lasers by use of a Cr 2+ :ZnSe saturable absorber , 2001 .

[12]  Alexander M. Malyarevich,et al.  Diode-pumped Tm:KY(WO4)2 laser passively Q-switched with PbS-doped glass , 2008 .

[13]  Igor Moskalev,et al.  Progress in Cr2+ and Fe2+ doped mid‐IR laser materials , 2010 .

[14]  Jun Xu,et al.  Performance of diode-pumped Tm3+ :Sc2SiO5 crystal passively Q-switched 2 mu m laser , 2014 .

[15]  N. Nishioka,et al.  Comparison of tissue ablation with pulsed holmium and thulium lasers , 1990 .

[16]  Baoquan Yao,et al.  Comparison of Tm:YLF and Tm:YAP in thermal analysis and laser performance , 2011 .

[17]  Zhiyi Wei,et al.  Graphene on SiC as a Q-switcher for a 2 μm laser. , 2012, Optics letters.

[18]  Valeriy Badikov,et al.  Efficient diode-pumped passively Q-switched laser operation around 1.9 μm and self-frequency Raman conversion of Tm-doped KY(WO4)2 , 2002 .

[19]  Zach DeVito,et al.  Opt , 2017 .

[20]  B. Yao,et al.  Efficient continuous wave and Q-switched operation of a dual-end-pumped c-cut Tm:YAP laser , 2010 .

[21]  S. Henderson,et al.  1-mJ/pulse Tm:YAG laser pumped by a 3-W diode laser. , 1991, Optics letters.

[22]  Xavier Mateos,et al.  Passive Q-switching of the diode pumped Tm3+:KLu(WO4)2 laser near 2-μm with Cr2+:ZnS saturable absorbers. , 2012, Optics express.

[23]  Y. Yang,et al.  Diode-pumped continuous wave tunable and graphene Q-switched Tm:LSO lasers. , 2013, Optics express.

[24]  Hongjie Liu,et al.  Analysis on preferential free running laser wavelength and performance modeling of Tm³⁺-doped YAP and YLF. , 2014, Applied optics.

[25]  Antoine Godard,et al.  Infrared (2–12 μm) solid-state laser sources: a review , 2007 .

[26]  T. King,et al.  Passive Q-switching of the Tm-silica fibre laser near 2 μm by a Cr2+:ZnSe saturable absorber crystal , 2005 .

[27]  Jun Xu,et al.  Room-temperature cw and pulsed operation of a diode-end-pumped Tm:YAP laser , 2008 .