Article
Optics
Shanshan Ye, Yiqi Chu, Song Huang, Qiaoxia Luo, Shihao Tang, Zhiyu Xu, Hao Liu, Chuchen Li, Chenyun Jiang, Xian Wang, Kai Chen, Wei Zhang, Ronghua Yu, Weiqing Gao
Summary: A passively Q-switched mode-locked (QSML) Er3+-doped fluoride fiber laser with a low laser threshold and high slope efficiency around a 2.8 mu m waveband is reported. The improvement is achieved by depositing bismuth sulfide (Bi2S3) particles onto the cavity mirror directly as a saturable absorber and using the cleaved end of the fluoride fiber as output directly.
Article
Optics
Mustafa Fetih Mekteplioglu, Yusuf Ozturk, Franz X. Kartner, Umit Demirbas
Summary: Stable passively Q-switched mode-locked operation was achieved in a Cr:LiSAF laser using an AlGaAs SBR. The system produced sub-5-ps long mode-locked pulses inside 2-2.5 mu s long Q-switched envelopes with 30-70 kHz repetition rate. Further work will focus on reducing the mode-locked pulsewidths to sub-1-ps level and increasing the modulation depth of mode-locking for peak power scaling.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Wentao Hou, Yanyan Xue, Zhipeng Qin, Huili Tang, Guoqiang Xie, Qingguo Wang, Xiaodong Xu, Jun Xu
Summary: We present the diode-pumped continuous wave and passively Q switched Er:GdScO3 crystal lasers operating at around 2.8 μm. With continuous wave operation, an output power of 579 mW and a slope efficiency of 16.6% were achieved. By employing Fe:ZnSe as a saturable absorber, a passively Q switched laser operation was realized, with a maximum output power of 32 mW, the shortest pulse duration of 286 ns at a repetition rate of 157.3 kHz, resulting in a pulse energy of 204 nJ and a pulse peak power of 0.7 W.
Article
Optics
X. I. N. G. Luo, Y. A. T. I. N. G. Tang, F. A. N. L. O. N. G. Dong, J. I. A. C. H. E. N. Wang, L. I. N. P. E. N. G. Yu, P. E. I. G. U. A. N. G. Yan, J. I. N. Z. H. A. N. G. Wang, Q. I. T. A. O. Lue, C. H. U. N. Y. U. Guo, S. H. U. A. N. G. C. H. E. N. Ruan
Summary: We present a 2.8-μm ultra-short pulse master oscillator power amplifier (MOPA) system based on a soliton self-frequency shift from a mode-locked thulium-doped fiber laser. The system achieves an average power of 3.42 W, a pulse width of 115 fs, and a pulse energy of 45.4 nJ. This is the first femtosecond watt-level all-fiber 2.8-μm laser system reported to date. The 2.8-μm pulse seed is generated through the soliton self-frequency shift of 2-μm ultra-short pulses in a cascaded silica and passive fluoride fiber. A high-efficiency and compact home-made end-pump silica-fluoride fiber combiner is used in the MOPA system, enabling nonlinear amplification of the 2.8-μm pulse and observation of soliton self-compression accompanied by spectral broadening.
Article
Optics
Ying'an Chen, Yicheng Zhou, Zhipeng Qin, Guoqiang Xie, Peng Yuan, Jingui Ma, Liejia Qian
Summary: This paper demonstrates the first experimental realization of a spatiotemporally mode-locked soliton laser in mid-infrared fluoride fiber, achieving a record pulse energy of 16.1 nJ and peak power of 74.6 kW at 2.8 mu m wavelength. This work extends the spatiotemporal mode-locking to soliton fiber lasers and should be of wide interest for the laser community.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2023)
Article
Optics
Guorui Lv, Lei Guo, Haiping Xu, Xian-An Dou, Qing Ye, Hui Kong, Yaling Yang, Jiaqi Wen, Jintian Bian, Kejian Yang
Summary: This paper reports a high-power acoustic-optical (AO) Q-switched Tm:YLF laser operating at around 1.83 μm by controlling the transmittance of the output coupler. The maximum output power under continuous-wave (CW) operation is 13 W with a slope efficiency of 32.7%. By inserting a YAG etalon into the cavity, the linewidth is compressed below 0.5 nm with a maximum output power of 12.2 W. In the Q-switched state, a maximum pulsed output power of 10.32 W with a pulse duration of 150 ns is achieved at a repetition rate of 15 kHz, and a maximum pulsed energy of 1.13 mJ with a duration of 131 ns is generated at 5 kHz. The relationship between the output wavelength and crystal length is theoretically analyzed, indicating that increasing the loss at 1880 nm is the key to achieving high-power output at 1.83 μm.
Article
Chemistry, Multidisciplinary
Qing Wu, Yanyu Wang, Gang Zhao, Haibin Wu, Yi Hu, Mengke Wang
Summary: In this work, an all-solid-state Tm:YAP laser Q-switched by a graphdiyne (GDY) saturable absorber is demonstrated, achieving the shortest pulse duration and highest repetition frequency from GDY in a solid-state Tm laser to date. The study shows the remarkable nonlinear optical properties of GDY, indicating its promising potential in the field of optoelectronics.
Article
Optics
Wenxin Liu, Yuqian Zu, Jia Guo, Shengjun Huang, Dongkai Li, Jie Liu, Danhua Liu, Yanqi Ge
Summary: In this study, a watt-level Tm:YAP pulsed laser at 1936.6 nm was achieved using graphdiyne (GDY) as a passive modulator. Efficient diode pumping led to a pulsed laser output of 1.37 W with a absorbed pump power of 4.44 W, demonstrating the potential of GDY as a modulator for generating pulsed lasers in the 2 μm band range.
Article
Physics, Multidisciplinary
Lingling Jiang, Zhongchao Wu, Shengjie Ma, Yongbin Zhu, Tingqing Cheng, Haihe Jiang
Summary: A new type of lithium niobate (LiNbO3) acousto-optic Q-switched Er,Cr:YSGG laser with high peak power was designed. The thermal lensing effect compensation was studied and the values of thermal focal length in the gain medium were calculated and measured. The output performance of the laser was improved and the pulse energy and peak power were increased compared to the traditional resonator.
FRONTIERS IN PHYSICS
(2023)
Article
Optics
Yifan Cui, Mingshu Chen, Weizhi Du, Yu Bai, Almantas Galvanauskas
Summary: This paper presents a high power and compact mid-IR ultrafast laser system, which achieved the highest average power sub-100fs duration pulses to date. The output pulses have similar to 85 fs pulse durations at similar to 2.85 mu m, with an average power of up to 2.4W, and pulse energies of >40 nJ.
Article
Optics
Gang Zhang, Kang Cheng, Zhiyong Jiao, Dailin Li, Xiaoyan Zhou, Xianfeng Xu, Tao Wang, Peng Liu
Summary: The study introduces a doubly Q-switched and mode-locked laser at 1.3 μm using an acousto-optic modulator and molybdenum selenide saturable absorber, which achieves stable QML pulses with a repetition rate of 1 kHz. It demonstrates a pulse energy of 550 μJ and a Q-switched envelope width of 155 ns at 12 W, showing a 92% reduction in envelope width and a 33-fold increase in pulse energy compared to the singly QML state.
OPTICS AND LASER TECHNOLOGY
(2022)
Review
Instruments & Instrumentation
Yue Qi, Zhenxu Bai, Yulei Wang, Xuanpu Zhang, Yaoyao Qi, Jie Ding, Zhenao Bai, Zhiwei Lu
Summary: Lasers with 1.5 μm emission wavelengths are suitable for eye-safe applications and transparency in the atmosphere. They are extensively used in remote sensing, ranging, and imaging, with stronger penetration in bad weather conditions compared to traditional 1 μm and visible bands. Er:Yb: glass is commonly used to generate 1.5 μm lasers, particularly for passively Q-switched pulses.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Manas Srivastava, Syed Tajammul Ahmad, Ankit Sharma, Prajwal Doddaballapura Lakshmijayasimha, M. Deseada Gutierrez Pascual, Frank Smyth, Prince M. Anandarajah, Aleksandra Kaszubowska-Anandarajah
Summary: The authors demonstrate a monolithically integrated optical frequency comb source based on mutually injection-locked gain-switched lasers. The photonic integrated circuit consists of two single mode slave lasers and a wavelength tunable single mode master laser. The PIC-based implementation offers the advantages of lower complexity, small footprint, and reduced energy consumption.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Yanxia Liu, Gang Zhang, Fengtian Gao, Zhiyong Jiao, Dailin Li
Summary: Stable output of Q-switched mode-locked laser at 1.06 μm was achieved using MoS2/MoSe2 hetero-structure saturable absorber. The heterojunction demonstrated competitive saturable absorption characteristics for all-solid-state lasers, producing higher envelope repetition rate and shorter envelope duration compared to previous results with two-dimensional materials.
Article
Optics
Richard Svejkar, Jan Sulc, Michal Nemec, Helena Jelinkova
Summary: This paper presents a compact diode-pumped continuous-wave Er:YLF laser emitting radiation at 2.8 mu M with output power 2.9 W and slope efficiency 26.2%. Additionally, passive Q-switching was successfully demonstrated with Fe:ZnSe polycrystal as a modulator, resulting in a pulse duration of 21 ns with peak power 252 W.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Optics
Jing Luo, Bo Li, Xiudong Zhou, Zhipeng Qin, Guoqiang Xie
Summary: Ice disaster poses a threat to electrical power systems. This study presents a safe and efficient method using mid-infrared laser to melt ice on high-voltage composite insulator. Experimental results show that ice can be quickly removed, and the residual water film protects the insulator.
OPTICAL ENGINEERING
(2022)
Article
Optics
Zhipeng Qin, Xuliang Chai, Guoqiang Xie, Zhicheng Xu, Yi Zhou, Qi Wu, Jie Li, Zhuan Wang, Yuxiang Weng, Ting Hai, Peng Yuan, Jingui Ma, Jianxin Chen, Liejia Qian
Summary: In this study, a 3-5 μm mid-infrared (MIR) SESAM is created by engineering an InAs/GaSb type-II superlattice. Using this SESAM, a SESAM mode-locked Er:ZBLAN fiber laser at 3.5 μm is realized, delivering MIR ultrashort pulses with high long-term stability.
Review
Materials Science, Multidisciplinary
Yuzhou Wang, Jinsheng Liu, Chen Cui, Fei Liang, Dazhi Lu, Jiyang Wang, Jingui Ma, Huaijin Zhang, Guoqiang Xie, Haohai Yu
Summary: This study focuses on the application of the La3Nb0.5Ga5.5O14 (LGN) crystal in mid-IR nonlinear frequency converters. By optimizing the starting polycrystalline component and temperature field, large-size LGN crystals with a diameter of 60 mm were successfully grown and their optical properties were characterized in detail. The findings suggest that LGN crystals have promising potential for generating few-cycle pulses and terawatt-class OPCPA systems.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Optics
Zhipeng Qin, Yicheng Zhou, Guoqiang Xie, Peng Yuan, Jingui Ma, Liejia Qian
Summary: This study reports on a red-diode-clad-pumped continuous-wave (CW) and mode-locked Er:ZBLAN fiber laser at 3.5 μm for the first time. Experimental and numerical simulation results show that a heavily-doped Er:ZBLAN fiber can effectively generate 3.5 μm laser through 658 nm laser diode pumping. By incorporating a homemade semiconductor saturable absorber mirror, a diode-pumped CW mode-locked 3.5 μm Er:ZBLAN fiber laser was demonstrated with high performance.
Article
Chemistry, Multidisciplinary
Zhixuan Hu, Jingui Ma
Summary: Due to the lack of suitable mid-IR laser gain medium, optical parametric amplifiers (OPAs) are used to generate ultrafast mid-IR lasers. However, the efficiency of OPA is limited by phase mismatches induced by wavelength and temperature deviations. In this study, we achieved wavelength- and temperature-insensitive mid-IR OPA with a LiGaS2 crystal using a noncollinear phase-matching configuration.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Yirui Wang, Jing Wang, Jingui Ma, Peng Yuan, Liejia Qian
Summary: This paper reveals that spatial chirp distortion can be significantly mitigated in quasi-parametric chirped-pulse amplification (QPCPA) with idler absorption, leading to improved quality of focused intensity.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Yirui Wang, Wenhao Wang, Yudong Tao, Jing Wang, Jingui Ma, Peng Yuan, Liejia Qian
Summary: This paper introduces a nonlinear technique to produce wavelength-dependent wavefront curvature, which can break Rayleigh's curse for a femtosecond laser. By utilizing optical parametric chirped-pulse amplification, the mechanism of wavelength-dependent wavefront is induced, enabling the change of focal spot size and increased Rayleigh range.
IEEE PHOTONICS JOURNAL
(2022)
Article
Physics, Multidisciplinary
Lu Wang, Uwe Niedermayer, Jingui Ma, Weihao Liu, Dongfang Zhang, Liejia Qian
Summary: Limited by acceleration synchronization difficulty, bridging the gap between non-relativistic and relativistic regimes has been a long-term challenge for on-chip dielectric laser-based accelerators. In this study, a laser-based accelerator scheme controlled by spatio-temporal coupling controlled laser pulses is proposed, allowing for acceleration of non-relativistic electrons to sub-MeV levels in a single acceleration structure. The scheme provides high precision temporal and spatial tuning of the driving laser and can potentially be extended to other wavelengths.
COMMUNICATIONS PHYSICS
(2022)
Article
Optics
Xingbin Gu, Jinsheng Liu, Peng Yuan, Xiaoniu Tu, Dongfang Zhang, Jing Wang, Guoqiang Xie, Jingui Ma
Summary: YCOB crystals oriented in both the XZ and XY principal planes possess broadband phase-matching property of intrapulse difference-frequency generation and can generate few-cycle pulses tunable from 2 to 4 μm.
Article
Optics
Yufang Ding, Jinsheng Liu, Xingbin Gu, Peng Yuan, Jingui Ma
Summary: We demonstrate highly efficient mid-infrared quasi-parametric chirped-pulse amplification (QPCPA) using a Sm3+-doped La3Ga5.5Nb0.5O14 (Sm:LGN) crystal. With pump wavelength at 1 μm, Sm3+ broadband absorption enables QPCPA for femtosecond signal pulses at 3.5 or 5 μm with near quantum-limited conversion efficiency. The mid-infrared QPCPA based on Sm:LGN exhibits robustness against phase-mismatch and pump-intensity variation due to back conversion suppression. This approach efficiently converts intense laser pulses at 1 μm into mid-infrared ultrashort pulses.
Article
Optics
Wenhao Wang, Yanfang Zhang, Ben Li, Jing Wang, Jingui Ma, Peng Yuan, Dongfang Zhang, Hao Zhang, Liejia Qian
Summary: We propose a scheme based on nonlinearity of parity-time (PT) symmetric optical systems to directly generate an ultrashort pulse train and further compress pulsed lasers. By using optical parametric amplification in a directional coupler of & chi;(2) waveguides, ultrafast gain switching can be achieved through pump-controlled breaking of PT symmetry. Theoretical demonstrations show that periodically amplitude-modulated laser pumping of such a PT symmetric optical system enables periodic gain switching, converting a continuous-wave signal laser into an ultrashort pulse train. By engineering the PT symmetry threshold, apodized gain switching can produce ultrashort pulses without side lobes. This work suggests a new approach to explore the nonlinearity inherent to various PT symmetric optical structures and extend optical manipulation capabilities.
Article
Optics
Wenhao Wang, Yudong Tao, Jingui Ma, Jing Wang, Peng Yuan, Dongfang Zhang, Liejia Qian
Summary: Parametric interaction enables energy transfers in both forward and backward directions among three waves. The back-conversion effect, though usually undesirable, is shown in this theoretical work to be the key to directly generating picosecond pulse trains without the need for a laser resonator. By using an optical parametric amplification setup with a second-order nonlinear medium, a quasi-continuous pump laser, and a sinusoidal amplitude-modulated seed signal, the modulation peaks (valleys) of the input signal can be transformed into output valleys (peaks) through the back-conversion process, resulting in the production of spectral sidebands and a picosecond pulse train. This picosecond pulse train can have an ultrahigh repetition rate of 40 GHz or higher, making it suitable for ultrafast applications.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2023)
Article
Optics
Jingui Ma, Xiaoping Ouyang, Liangze Pan, Peng Yuan, Dongfang Zhang, Jing Wang, Guoqiang Xie, Jianqiang Zhu, Liejia Qian
Summary: This paper proposes and demonstrates a novel single-shot cross-correlator (SSCC) device with two separate measurement channels for large-window pedestal measurement and ultrashort pulse measurement, achieving accurate characterization of pulse contrast in a single shot.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2022)
Article
Optics
Hui Tong, Fuyong Wang, Zhipeng Qin, Guoqiang Xie, Liejia Qian
Summary: By implementing temporal-filtering in an optical parametric oscillator, combined with strong cascading nonlinearity and dispersion, dissipative solitons can be generated to substantially improve the performance of the oscillator.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2022)
