Croitoru Gabriela, Jipa Florin, Greculeasa Madalin, Broasca Alin, Voicu Flavius, Gheorghe Lucian, Pavel Nicolaie
Laboratory of Solid-State Quantum Electronics, National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Ilfov, Romania.
Photonic Investigations Laboratory-PhIL, Center for Advanced Laser Technology, National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Ilfov, Romania.
Materials (Basel). 2024 Apr 11;17(8):1758. doi: 10.3390/ma17081758.
Buried depressed-cladding waveguides were fabricated in 0.7-at.% Nd:CaLiNbGaO (Nd:CLNGG) and 7.28-at.% Yb:CLNGG disordered laser crystals grown by Czochralski method. Circular waveguides with 100 μm diameters were inscribed in both crystals with picosecond (ps) laser pulses at 532 nm of 0.15 μJ energy at 500 kHz repetition rate. A line-by-line writing technique at 1 mm/s scanning speed was used. Laser emission at 1.06 μm (with 0.35 mJ pulse energy) and at 1.03 μm (with 0.16 mJ pulse energy) was obtained from the waveguide inscribed in Nd:CLNGG and Yb:CLNGG, respectively, employing quasi-continuous wave pumping with fiber-coupled diode lasers. The waveguide realized in RE-doped CLNGG crystals using ps-laser pulses at high repetition rates could provide Q-switched or mode-locked miniaturized lasers for a large number of photonic applications.
通过提拉法生长的0.7原子百分比的Nd:CaLiNbGaO（Nd:CLNGG）和7.28原子百分比的Yb:CLNGG无序激光晶体中制备了掩埋式凹陷包层波导。在这两种晶体中，使用波长为532 nm、能量为0.15 μJ、重复频率为500 kHz的皮秒（ps）激光脉冲刻写直径为100 μm的圆形波导。采用1 mm/s扫描速度的逐行写入技术。分别从Nd:CLNGG和Yb:CLNGG中刻写的波导中获得了1.06 μm（脉冲能量为0.35 mJ）和1.03 μm（脉冲能量为0.16 mJ）的激光发射，采用光纤耦合二极管激光器进行准连续波泵浦。利用高重复率的ps激光脉冲在稀土掺杂的CLNGG晶体中实现的波导可为大量光子应用提供调Q或锁模小型激光器。
