Passively Q-switched diode-pumped Tm, Ho:LuVO₄ laser with a black phosphorus saturable absorber*

Abstract

We presented a passively Q-switched (PQS) diode-pumped c-cut Tm, Ho:LuVO4 laser with a black phosphorus saturable absorber for the first time. Under PQS mode, an average output power of 0.86 W and a peak power of 2.32 W were acquired from the Tm, Ho:LuVO4 laser with the pump power of 14.55 W, corresponding to a pulse width of 2.89 μ s , a pulse repetition rate of 71.84 kHz, and a pulse energy of about 6.70 μ J .

Direct Kerr-lens mode-locked Tm:LuYO3 ceramic laser

“…With rising research interest in 2 µm lasers, various types of Tm 3+ -doped laser materials have also been developed in the past years, such as lutetium aluminum garnet (LuAG), [14,15] cadmium germanium arsenide, [16] lithium lutetium fluoride, [17] calcium lithium niobium gallium garnet, [18] etc. [19] Among these, Tm 3+ -doped sesquioxides (Tm 3+ :Re 2 O 3 , Re = Lu, Y or Sc) are the most attractive gain media due to their low phonon energy and broad gain bandwidth. [20] In particular, Tm 3+ :Re 2 O 3 sesquioxides have a higher nonlinear refractive index that can enhance the self-phase modulation effect (SPM) to realize KLM.…”

Experimental Investigation of Double-End Pumped Tm, Ho: GdVO4 Laser at Cryogenic Temperature

“…Rare earth ions such as Tm 3+ and Ho 3+ doped into vanadate hosts exhibit a broadly spectral band at a pump wavelength of~800 nm and great absorption/emission cross sections [8] which facilitate the laser crystal to efficiently absorb pump light, thus improving laser performances. Tm-doped vanadate laser [9] pumped by laser diodes with~800 nm wavelength, Ho-doped vanadate laser [10] in-band pumped by Tm-lasers or laser diodes, and Tm, Ho-codoped vanadate lasers [11,12] pumped by laser diodes have been extensively investigated under continuous wave or pulse operating modes. Tm, Ho-codoped lasers with sensitization ions Tm 3+ and activation ions Ho 3+ can be pumped by laser diodes with 800 nm wavelengths and simultaneously exhibit excellent Q-switching performance due to the strong stored energy capability of Ho 3+ ions.…”