Ayevi Berke, Morova Yagız, Morova Berna, Damiano Eugenio, Tonelli Mauro, Sennaroglu Alphan
Opt Lett. 2024 Dec 15;49(24):6968-6971. doi: 10.1364/OL.544317.
We report on the operation of an efficient Tm,Ho:YLF depressed cladding, channeled waveguide laser in both continuous-wave (CW) and passively Q-switched (PQS) regimes, producing laser emission at the wavelength of 2.05 µm. The 70-µm diameter depressed cladding waveguide, fabricated using femtosecond laser inscription, had a low propagation loss value of 0.14 dB/cm and a refractive index contrast of 8.3 × 10. In the CW regime, the waveguide laser was excited at 780 nm, and an output power of up to 2 W was generated at the incident pump power of 4.14 W with a power slope efficiency of 50.0%. PQS operation was further realized by utilizing a Cr:ZnSe saturable absorber (SA), whereby the waveguide laser generated as short as 19.6-ns pulses with a power slope efficiency of 18.9%.
我们报道了一种高效的Tm,Ho:YLF凹陷包层沟道波导激光器在连续波（CW）和被动调Q（PQS）模式下的运行情况，其在2.05 µm波长处产生激光发射。采用飞秒激光写入法制造的直径为70 µm的凹陷包层波导，具有0.14 dB/cm的低传播损耗值和8.3×10的折射率对比度。在连续波模式下，波导激光器在780 nm处被泵浦，在4.14 W的入射泵浦功率下产生高达2 W的输出功率，功率斜率效率为50.0%。通过使用Cr:ZnSe可饱和吸收体（SA）进一步实现了被动调Q运行，由此波导激光器产生了短至19.6 ns的脉冲，功率斜率效率为18.9%。
