Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7127637 | Optics & Laser Technology | 2019 | 6 Pages |
Abstract
Laser emission between about 1850 and 1880â¯nm is of great interest for neural stimulation applications. We report here on the diode-pumped, continuous-wave and passively Q-switched laser operation of Tm:CaYAlO4 in this specific wavelength domain, for the first time to our knowledge. In the continuous-wave regime, the maximum output power reaches 5.35â¯W at 1864â¯nm with a laser slope efficiency of about 40.5%. Using a Cr:ZnSe saturable absorber, passive Q-switching is achieved with a maximum average output power of 2.37â¯W at 1857â¯nm. The narrowest laser pulse width is found to be about 59â¯ns for a repetition rate of 35.3â¯kHz and the corresponding laser pulse peak power and pulse energy are about 1.145â¯kW and 67.5â¯Î¼J, respectively. By introducing an undoped YAG crystal as intracavity etalon, tunable and passively Q-switched laser operation is obtained between 1848 and 1876â¯nm while keeping high pulse energies and peak powers.
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Authors
Jinglong Lan, Bin Xu, Yuzhao Zhang, Huiying Xu, Zhiping Cai, Xiaodong Xu, Dongzhen Li, Rémi Soulard, Richard Moncorgé, Jun Xu,