Author Affiliations
Abstract
1 Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
2 Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
3 State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China
In this paper, the high-repetition-rate passively Q-switched (PQS) and the femtosecond continuous-wave mode-locked (CWML) lasers are successfully obtained with 2D black arsenic-phosphorus (b-AsP) nanosheets as saturable absorber (SA) at 1 μm for the first time, to the best of our knowledge. The saturable absorption properties and ultrafast carrier dynamics of the 2D b-AsP SA are explored by Z-scan and pump-probe techniques. Moreover, according to the measurement of desired nonlinear optical characteristics of the relaxation time of 27 ps and the modulation depth of 7.14%, the PQS and CWML lasers are demonstrated with the highest repetition rate of 2.26 MHz in the PQS laser and the pulse width of 470 fs in the CWML laser. The results show 2D b-AsP SA has enormous potential for pulse modulation in solid-state bulk lasers.
ultrafast lasers mode-locked lasers passively Q-switched lasers nonlinearity Chinese Optics Letters
2022, 20(2): 021408
Author Affiliations
Abstract
1 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
2 School of Physics, Nanjing University, Nanjing 210093, China
3 School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
We demonstrated the efficient plasmon-induced nonlinear absorption of liquid metal GaInSn nanospheres prepared by a facile liquid-phase method. With GaInSn as saturable absorbers, a passively Q-switching operation was obtained at both 1.3 and 2 μm. The pulse width of 32 ns was achieved at 1.3 μm with repetition rate of 44 kHz, single pulse energy of 51.9 μJ, and output power of 425 mW. Meanwhile, 510 ns and 92 kHz pulses with energy of 36.1 μJ and output power of 2.48 W were obtained at 2 μm. This work provides the potential of liquid metal for improving metal functions and flexible optical devices.
GaInSn nanosphere passively Q-switched lasers saturable absorber Chinese Optics Letters
2020, 18(11): 111901
Author Affiliations
Abstract
1 Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
2 Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
3 Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Electronic Science and Technology and College of Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, China
A new disordered crystal Nd:SrAl12O19 (Nd:SRA) with an Nd3+ doping concentration of 5% was successfully grown using the Czochralski method. A diode-pumped Nd:SRA Q-switched laser operating at 1049 nm was demonstrated for the first time, to the best of our knowledge. Based on an MXene Ti3C2Tx sheet, a high repetition rate of 201 kHz and a Q-switched pulse width of 346 ns were obtained when the absorbed pump power was 2.8 W. The peak power and single pulse energy were 1.87 W and 0.65 μJ, respectively.
Nd:SrAl12O19 crystal MXene Ti3C2Tx disordered crystal passively Q-switched lasers Chinese Optics Letters
2020, 18(4): 041401
1 天水师范学院激光技术研究所, 甘肃 天水 741001
2 宝鸡文理学院物理与光电技术学院, 陕西 宝鸡 721016
3 陕西科技大学文理学院, 陕西 西安 710021
采用双壁碳纳米管可饱和吸收体为锁模启动元件,在Tm∶LuAG激光器中实现了输出波长分别为2017 nm和2029 nm的双波长被动调Q锁模运转。该实验装置以可调谐掺钛蓝宝石激光器为抽运源,选用透过率为3%的输出耦合镜,当吸收功率大于2292 mW时,激光运转进入稳定调Q锁模状态。最大吸收抽运功率达到6.7 W时,调Q锁模输出功率为1.28 W,斜效率为22.39%,锁模脉冲的重复频率为102 MHz,对应的单脉冲能量为12.55 nJ。
激光器 Tm∶LuAG激光器; 可饱和吸收体 被动调Q激光器 双波长 光学学报
2019, 39(12): 1214004
1 天水师范学院激光技术研究所, 甘肃 天水 741000
2 陕西师范大学物理学与信息技术学院, 陕西 西安 710062
利用二维过渡金属材料WS2作为2 μm波段可饱和吸收体, 采用典型的X型四镜腔结构, 实现了Tm,Ho∶LuLiF4激光器低阈值被动调Q运转。实验结果表明, 吸收功率为260 mW时开始启动调Q运转, 吸收抽运功率大于650 mW时, 调Q激光脉冲进入稳定运转。抽运功率为2000 mW时, 在中心波长1895 nm波段输出功率为88 mW, 典型脉冲宽度为4 μs, 重复频率为16.89 kHz, 对应最大单脉冲能量为5.21 μJ。结果表明, WS2材料可以作为2 μm固体激光器的可饱和吸收体。
激光技术 WS2可饱和吸收体 被动调Q激光器 Ho∶LuLiF4激光器 低阈值激光器
