Article
Nanoscience & Nanotechnology
Yingtian Xu, Hanfei Hu, Hongda Wu, Chongyang Xu, He Zhang, Liang Jin, Yonggang Zou, Xiaohui Ma, Jingzhi Yin
Summary: The study demonstrated the use of CuCrO2 nanoparticle-polyimide composite film as a saturable absorber to regulate the output characteristics of a passively Q-switched fiber laser at 1.55 micrometers. By utilizing reverse saturable and saturable absorptions, the laser showed significant performance enhancement with two stages of output. This approach resulted in pulse duration and repetition rate compression simultaneously, highlighting the importance of proper cavity loss design in optimizing Q-switched pulse laser output characteristics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Shurong Jiang, Chen Wei, Le Zheng, H. Zhou, W. Liu, J. Zhang, H. Zhang, Yong Liu
Summary: We report a transition metal dichalcogenides-PtSe2 Q-switched single-mode fiber laser operating at 2783.2 nm with a nearly watt-level average output power. By incorporating a PtSe2 coated mirror as a saturable absorber, stable Q-switched laser pulses were obtained with high average power and pulse energy. The operating wavelength range of the PtSe2-coated mirror was also investigated using a plane ruled grating.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Chemistry, Physical
Sofiya Karankova, Oleksiy Kovalchuk, Sungjae Lee, Bowon Ryu, Siam Uddin, Hyowon Moon, Yong-Won Song
Summary: We investigate the optical nonlinearities of transfer-free graphene synthesized by the atomic carbon spraying (ACS) method, and compare it with graphene prepared by chemical vapor deposition (CVD) and reduced graphene oxides (rGOs) by electro-spraying (ES). The three nanocrystal structures are characterized by transmission electron microscopy and Raman analysis. The nonlinear properties of ACS graphene are found to be comparable to CVD graphene and significantly higher than ES rGOs, demonstrating the unimpaired nonlinear properties of graphene prepared by the ACS method. The saturation intensity of ACS graphene is measured to be 32.14 MW cm(-2), an order of magnitude lower than conventional ES rGOs.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jinho Lee, Ju Han Lee
Summary: This study demonstrates the successful development of a 2058-nm holmium fiber laser utilizing a saturable absorber (SA) based on graphene oxide (GO), capable of producing Q-switched pulses with adjustable pulse width and repetition rate.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Lijun Yu, Benhai Wang, Haobin Han, Chaoqing Dai, Wei Liu, Yueyue Wang
Summary: In this study, Antimony selenide (Sb2Se3) nanorods were successfully prepared by the hot solvent method, demonstrating excellent photoelectric properties and nonlinear optical performance. Integration of Sb2Se3 into fiber lasers enabled Q-switching with high single pulse energy and low self-starting threshold.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Xiameng Li, Jian Liu, Feifei Qin, Da Chen, Xu Wang
Summary: Van der Waals (vdW) heterostructures are a promising platform for optimizing and controlling physical properties of materials and devices in ultrafast photonic applications. In this study, a hybrid vdW saturable absorber (SA) based on ZnO sphere heterostructures has been fabricated. Compared to the ZnO sphere SA, the vdW SA exhibits stronger emission intensity in the ultraviolet-visible range and higher optical absorption in the near-infrared range. By using balanced twin-detector technology, a modulation depth of 6.6% has been obtained from the vdW SA, which is 2.8 times greater than that of the solo ZnO SA. Based on the hybrid vdW SA, stable Q-switched laser and mode-locked laser operation have been achieved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Haroon Asghar, Rizwan Ahmed, Muhammad Sohail, Zeshan A. Umar, M. Aslam Baig
Summary: In this work, the performance of a Q-switched erbium-doped fiber laser (EDFL) using a cadmium-sulfide (CdS) nanoparticle-based saturable absorber (SA) is demonstrated. By depositing CdS nanoparticles on the fiber ferrule, self-starting and stable Q-switched operation is achieved. The emission wavelength, pulse repetition rates, and pulse duration vary with the pump power, leading to changes in the maximum average output power, pulse energy, and peak power. Furthermore, the stability of the laser system is investigated.
Article
Physics, Applied
Shang Gao, Wei Wang
Summary: In this study, few-layered MoSe2 nanosheets were fabricated using the ultrasonic-assisted liquid phase exfoliation method, with typical characterizations confirming their nonlinear absorption properties. A passively Q-switched Nd:YVO4 laser emitting 1 micron wavelength was successfully demonstrated with the MoSe2 saturable absorber, generating stable pulses with a maximum output power of 215 mW and a shortest pulse width of 192 ns. The experimental data provides a solid foundation for the photonics applications of MoSe2 nanomaterials.
MODERN PHYSICS LETTERS B
(2021)
Article
Instruments & Instrumentation
Song Yang, Qian-Yun Zhang, Li Li, Lei Jin, Shih-Chi Chen
Summary: This paper presents the first experimental demonstration of self-mode-locked dark solitons in a Tm-Ho doped fiber laser at 1.93 μm. The dark solitons are generated by exploiting the reverse saturable excited-state absorption of a gain fiber, achieving higher power and damage threshold compared to conventional methods. Simulation results confirm the generation of stable dark solitons with high average power using this approach.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Optics
Xiaofei Ma, Tao Wang, Jian Zhang, Zhitai Jia, Baitao Zhang, Jingliang He, Xutang Tao
Summary: In this study, graphene oxide (GO) samples with different oxidation degrees were drop-coated onto sapphire substrates as the saturable absorber (SA). Based on this, GO, an excellent SA, is innovatively combined with single crystal fiber (SCF), an outstanding laser gain medium, to achieve 1.03 μm passively Q-switched pulsed laser output with a maximum average power of 2.183 W and a repetition frequency of 317.42 kHz. This is, to our knowledge, the largest average power of passively Q-switched SCF pulsed laser output reported so far.
OPTICS COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Chongyang Xu, Yingtian Xu, Yuanyuan Jing, Hongda Wu, Hanfei Hu, He Zhang, Liang Jin, Yonggang Zou, Xiaohui Ma
Summary: Fe3O4 (FO) nanoparticles (NPs) - polyimide (PI) film was used as saturable absorber (SA), achieving passive Q-switched output at 1.5 μm. By adjusting the ratio of FO NPs to PI, the laser output characteristics can be further optimized, resulting in simultaneous compression of repetition rate and pulse duration for the first time.
Article
Optics
SuhYoung Kwon, Jinho Lee, Ju Han Lee
Summary: In this experiment, a polarization-insensitive Ti2AlN-based fiberized saturable absorber was fabricated for Q-switching of a fiber laser. The resulting SA showed a modulation depth of around 3.2% and a saturation intensity of approximately 3.4 MW cm(-2). It was successfully used to generate Q-switched pulses in an erbium-doped fiber ring cavity, with a temporal width of approximately 2.52 μs at a wavelength of around 1557 nm and a repetition rate of 41.55 kHz.
Article
Materials Science, Multidisciplinary
A. W. Al-Alimi, N. A. Cholan, M. T. Alresheedi, A. F. Abas, Z. A. Talib, N. Mohd Yusoff, M. A. Mahdi
Summary: This study investigates the use of polarization-maintaining thulium-doped fiber as a saturable absorber in an erbium-ytterbium-doped fiber laser. The experimental results show that stable pulse laser output can be achieved with the proposed fiber laser architecture.
RESULTS IN PHYSICS
(2022)
Article
Optics
Gang Wang, Yuxuan Ma, Ce Shang, Haojing Huang, Zherui Lu, Shuaixin Wang, Jingxuan Sun, Chenghong Zhang, Bo Fu
Summary: The study shows that the reverse saturable absorption effect has different impacts on the properties of conventional and dissipative solitons, affecting their loss, peak power, and pulse energy. It is found that the effect restricts the maximum pulse energy and facilitates the formation of multiple solitons in the conventional solitons state, while increasing the maximum pulse energy and playing a key role in transforming the pulse states in the dissipative solitons state. This highlights the importance of rational use of the reverse saturable absorption effect in different mode-locked regimes.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Jinho Lee, Suh-Young Kwon, Ju Han Lee
Summary: The study demonstrated the use of a V2AlC saturable absorber in a harmonically mode-locked erbium-doped fiber laser, successfully adjusting the repetition rate to generate high-frequency mode-locked pulses.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Teng Zhang, Wanxin Zheng, Kai Feng, Dong Wang, Bin Xu, Zhengqian Luo, Zhenfang Yu, Xudong Cui, Mauro Luciano Baesso, Tomaz Catunda
Summary: This study demonstrates high-power continuous-wave ultraviolet laser generation through intracavity frequency doubling, and replaces the use of He-Cd vapor laser with solid-state 320 nm ultraviolet laser in various applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Jinhai Zou, Jin Li, Tianran Li, Yizhong Huang, Qiujun Ruan, Yanbo Dou, Zhengqian Luo
Summary: This study demonstrates for the first time a compact tunable continuous-wave (CW) deep ultraviolet (DUV) laser source. By directly intracavity frequency doubling visible fiber lasers, efficient DUV laser emission with a wide wavelength tuning range and narrow linewidth is achieved. The developed DUV laser source has high power and efficiency, providing new possibilities for DUV laser applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Honggang Sun, Lixin Wang, Jinhai Zou, Qiujun Ruan, Yu Ding, Chuchu Dong, Zhipeng Dong, Zhengqian Luo
Summary: We report the first visible-wavelength all-fiber passively mode-locked vortex laser, capable of delivering picosecond optical vortex pulses with adjustable pulse duration and narrow linewidth. This study also demonstrates the potential applications of this technology in particle trapping, optical tweezers, and high-resolution microscopy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Qiujun Ruan, Xiaosheng Xiao, Jinhai Zou, Hang Wang, Shuzheng Fan, Tianran Li, Jin Li, Zhipeng Dong, Zhiping Cai, Zhengqian Luo
Summary: This paper reports a fiber laser capable of spatiotemporal mode-locking (STML) at visible wavelengths, demonstrating its stability and narrow pulse duration through theoretical prediction and experimental realization. The locking of transverse and longitudinal modes is also illustrated, and the power is further boosted by establishing an ultrafast fiber amplifier.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Zhao Li, Fengbo Han, Zhipeng Dong, Qingyang Du, Zhengqian Luo
Summary: In this article, we theoretically investigate the propagation dynamics of mid-IR Raman soliton in a Ge28Sb12Se60 chalcogenide glass waveguide. By carefully engineering the waveguide dispersion and nonlinear interaction, we propose a suspended chalcogenide glass waveguide device that allows an octave-tuning, from 1.96 μm to 3.98 μm, Raman soliton source. Our result provides a solution to continuously tunable on-chip mid-IR ultrafast laser sources.
Article
Engineering, Electrical & Electronic
Yingying Wang, Lingling Yang, Fan Yang, Lulu Xu, Zhongchao Wu, Teng Liu, Duanduan Wu, Lei Zhang, Shixun Dai
Summary: This article demonstrates a low-threshold and narrow linewidth Brillouin fiber laser (BFL) at 2 μm using a chalcogenide As2S3 fiber as the Brillouin gain fiber. The BFL achieves excellent performance in terms of laser power threshold and linewidth, with the lowest laser power threshold and narrowest laser linewidth ever achieved at 2 μm. These results are attributed to the high Brillouin gain coefficient and small effective mode field area of the As2S3 fiber, as well as the optimized fiber length and low cavity loss of the BFL.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Lulu Xu, Yingying Wang, Shixun Dai, Lei Zhang, Duanduan Wu, Haotuo Shen, Fan Yang, Zenghua Xu
Summary: A single-longitudinal-mode Brillouin random fiber laser with high linewidth-compression ratio and laser efficiency was achieved in this study. The theoretical analysis and experimental results showed the potential of the proposed distributed intrinsic feedback mechanism structure and Brillouin amplification in suppressing longitudinal modes and compressing the linewidth of the laser.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Zeqiu Hu, Duanduan Wu, Wei Lin, Zhe LI, Shixun Dai
Summary: The generation conditions and influence parameters of self-mode-locked pulses in fiber lasers were studied using a simulation model. It was found that a low laser coupling output ratio can help the formation of a self-mode-locked pulse. The anomalous dispersion self-mode-locked EDFL has a relative high tolerance for dispersion value change, while the normal dispersion one possesses a low mode-locked pulse formation threshold but is relative polarization sensitive.
Article
Optics
J. I. N. F. E. N. Hong, J. I. N. H. A. I. Zou, Y. U. S. H. U. Wang, Q. I. U. J. U. N. Ruan, T. I. N. G. T. I. N. G. Chen, Y. A. N. G. Cheng, Y. I. K. U. N. Bu, Z. H. E. N. G. Q. I. A. N. Luo
Summary: We present a compact continuous-wave all-fiber cyan laser, which achieves downconversion cyan lasing at 491.5 nm with a maximum output power of 97.5 mW, a slope efficiency of 23.7%, and a power fluctuation of less than 0.41%. This all-fiber cyan laser has great significance in expanding the color reproduction range of laser displays and has potential applications in fluorescence imaging, underwater communication, and detection.
Article
Optics
Hang Wang, Yadi Yang, Jinfen Hong, Xin Zhou, Qiujun Ruan, Zhipeng Dong, Mikhail Melkumov, Sergey Firstov, Alexey Lobanov, Zhengqian Luo
Summary: In this study, we demonstrate a dissipative soliton resonance (DSR) in a bismuth-doped phosphosilicate fiber (Bi-PSF) laser operating at dual-wave bands of 1.3/1.4 μm. By utilizing a homemade Raman fiber laser at 1239 nm as the pump source and a non-linear amplifying loop mirror for initiating mode-locking, stable DSR operation is achieved at the wavelengths of 1343 nm and 1406 nm with large spectral bandwidths. This work opens up opportunities for various applications, including all-spectral-band communications, bio-medical imaging, and terahertz difference frequency generation.
Article
Optics
Tianran Li, Ziyu Wang, Jinhai Zou, Jinfen Hong, Qiujun Ruan, Hang Wang, Zhipeng Dong, Zhengqian Luo
Summary: This study demonstrates, for the first time, the direct generation of millijoule-level green pulses from a fiber laser, overcoming the limitations of near-IR laser frequency conversion and providing a model for compact, high-efficiency, and high-energy visible fiber pulsed lasers.
PHOTONICS RESEARCH
(2023)
Article
Optics
Liquan Zhu, Zhipeng Dong, Jinhai Zou, Linxiao Deng, Ting Li, Yuantong Chen, Chun Gu, Lixin Xu, Zhengqian Luo
Summary: This study investigates the use of optical fiber lasers in display systems by integrating a Pr3+-doped green all-fiber laser into a laser projection display system. A 520 nm semiconductor green laser diode module was integrated as a control group for comparison. The color gamut and speckle performances were studied and compared. The experimental group showed slightly better performance in color gamut volume, and the speckle contrast rapidly decreased with increasing power. This study is the first to apply a fiber laser to a laser display system, providing insights for developing speckle-free or speckle-reduced laser display systems.
Article
Engineering, Electrical & Electronic
Zhipeng Dong, Hang Wang, Wencheng Jia, Jinhai Zou, Zhengqian Luo
Summary: In this study, a 488 nm blue picosecond pulse was generated by frequency doubling a homemade 977 nm picosecond fiber laser. The original laser had a 977.84 nm central wavelength, 0.13 nm spectral width, 12.94 ps pulse duration, 76.09 MHz repetition rate, and 5.12 mW average power. After scaling up the power to 2.06 W, the pulse duration and spectral width slightly increased to 16.84 ps and 0.24 nm, respectively. The blue picosecond laser achieved a central wavelength of 488.92 nm and a linewidth of 0.17 nm. This compact and high-power laser has potential applications in high-resolution imaging, underwater detection, and material processing.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hang Wang, Ziyu Wang, Wencheng Jia, Luming Song, Tingting Chen, Jinhai Zou, Zhipeng Dong, Zhengqian Luo
Summary: A 978 nm ultrafast fiber laser was demonstrated with a robust all-polarization-maintaining mode-locking using a phase-biased nonlinear amplifying loop mirror. It achieved a stable self-starting mode-locking with an average output power of 2.12 W. The laser was further amplified and used for second harmonic generation, producing a 489 nm ultrashort laser.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Hang Wang, Wencheng Jia, Yongjia Yao, Xinyun Yang, Mikhail Melkumov, Sergey Firstov, Alexey Lobanov, Zhipeng Dong, Zhengqian Luo
Summary: In this study, a 1.3/1.4μm random fiber laser (RFL) was successfully generated using bismuth-doped phosphosilicate fiber. The RFL showed excellent long-term operational stability and a wide emission spectrum. Compared to traditional laser sources, the RFL reduced the speckle contrast of images.
CHINESE OPTICS LETTERS
(2023)