Article
Optics
Jingcheng Feng, Yanling Cheng, Heng Tu, Feidi Fan, Haihai Yu, Huaijin Zhang, Guochun Zhang, Jiyang Wang, Yicheng Wu
Summary: In this study, we demonstrated the improvement in output power of a self-frequency-doubling (SFD) green laser in Nd:LCB crystal. The spectra were measured and calculated using the Judd-Ofelt theory, providing design guidelines for SFD lasers. By taking advantage of energy level splitting of Nd3+ ions, we achieved an output power of 1.7W for a SFD green laser at a wavelength of 540nm, which represents the highest output power in the Nd:LCB crystal and avoids intrinsic absorption of Nd3+ ions. This work not only develops a promising SFD laser crystal, but also provides an effective approach for enhancing SFD laser output power.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Yunshan Zhang, Jingyu Zou, Wanxin Zheng, Kai Feng, Bin Xu, Zhenfang Yu
Summary: This study focuses on diode-pumped continuous-wave Pr-doped YLF laser and its frequency doubling to 320 nm, achieving a maximum output power of 3.44 W for the 640 nm fundamental wave and 1.01 W for the 320 nm ultraviolet radiation using an LBO crystal. The use of a type-I phase-matched LBO crystal as a frequency doubler is crucial in achieving high-power ultraviolet radiation.
CHINESE OPTICS LETTERS
(2021)
Article
Optics
Xiaoxu Yu, Hongwei Chu, Fangyuan Zha, Han Pan, Shengzhi Zhao, Dechun LI, Zhongben Pan
Summary: This letter reports a watt-level laser diode (LD)-pumped -2.3-micron Tm3+-doped laser, achieving a continuous wave output power of 1.89 watts, setting a new highest record.
Article
Optics
Yi-Huai Zhu, Peng-Sheng Shen, Shu-Kai Zhen, Lin-Peng Yu, Xing Luo, Jin-Zhang Wang, Pei-Guang Yan, Fan-Long Dong, Wen-Jun Liu, Qi-Tao Lue, Chun-Yu Guo, Shuang-Chen Ruan
Summary: This work proposes and experimentally demonstrates for the first time a synchronously pumped fiber Raman laser (SPFRL) operating at 1.7 μm. The Stokes pulses are generated through third harmonic pumping by a 1563 nm picosecond pulsed fiber laser, with high average power, short pulse duration, and high repetition frequency. This work provides a pathway to a power scalable ultrafast laser at 1.7 μm via a compact and elegant all-fiber solution.
Article
Engineering, Electrical & Electronic
Shuaihao Ji, Shuhua Huang, Zhongyu Wang, Xiuji Lin, Bo Xiao, Huiying Xu, Zhiping Cai
Summary: In this study, we successfully developed a deep-red laser with a high pumping rate using a home-made 640 nm pump source. The maximum output power of the deep-red fiber laser was 1.46 W at 752.6 nm, and its slope efficiency was 53%. Additionally, we demonstrated a tunable deep-red fiber laser with a tuning range of 13.7 nm, from 746.5 nm to 760.2 nm, which is the widest tuning range for a Ho3+-doped fiber laser at deep-red wavelengths.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
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
Optics
Yongjing Wu, Chuanfei Yao, Xuan Wang, Linjing Yang, Chao Wang, Guochuan Ren, Pingxue Li
Summary: In this Letter, we demonstrated the generation of a watt-level 2.8 μm ultrashort pulse laser from an all-fiber Er:ZBLAN amplifier using red-shifted Raman soliton pulse as the seed source. The results showed that the pulse duration of amplified pulses was limited by intracavity dispersion accumulation in the Er:ZBLAN fiber amplifier.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Tingting Chen, Jin Li, Jinliang Yuan, Xin Zhou, Yu Ding, Lixin Wang, Jinhai Zou, Qingyuan Li, Qiujun Ruan, Hang Wang, Jinfen Hong, Yikun Bu, Zhengqian Luo
Summary: This report presents the use of highly resistant dielectric-coated fiber mirrors in watt-level mid-IR Dy3+- and Er3+-doped all-fiber lasers. The specially designed fiber pigtail mirror allows for efficient dichroic operation and exhibits high damage density, making it suitable for high-power mid-IR laser operation. A Ta2O5 monolayer protective film is used to mitigate fiber tip photodegradation. The compact all-fiber mid-IR cavities are formed by connecting the Dy3+- and Er3+-doped ZBLAN gain fibers with dielectric-coated fiber mirrors. The achieved maximum output powers and slope efficiencies are reported for both Dy3+ and Er3+ lasers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Jingchong Wang, Chen Guan, Yang Liu, Zhenhua Cong, Shiwu Wang, Yi Nie, Zhigang Zhao, Zhaojun Liu
Summary: In this study, a red laser diode-pumped Alexandrite laser with a semiconductor saturable absorber mirror for passive Q-switching was presented. By using customized SESAMs, a pulsed Alexandrite laser at 749.6 nm with an average power of 0.904 W, a repetition rate of 20.27 kHz, and a pulse energy of 44.59 μJ was achieved.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Shuaihao Ji, Shaoqun Liu, Xiuji Lin, Yingyi Song, Bo Xiao, Qichen Feng, Wensong Li, Huiying Xu, Zhiping Cai
Summary: The development of visible fiber lasers has expanded their applications in various fields. Green laser oscillation in Ho3+ active fibers has helped bridge the green gap, allowing for continuous tunable laser operation at the true-green wavelength. The achieved output power of up to 0.98 W at a center wavelength of 543.1 nm represents the highest power level demonstrated from a visible Ho3+-doped fiber laser to date.
Article
Optics
Weihang Cao, Zhengdong Dai, Run Fang, Zhongyu Wang, Yuchen Xue, Bo Xiao, Huiying Xu, Zhiping Cai
Summary: Continuous-wave deep red lasers at 696.6 and 698.6 nm were achieved in a Pr3+:YLF crystal pumped by an InGaN laser diode. A Lyot filter was used as a birefringent filter in the cavity to select the wavelengths, and the lasers achieved maximum output powers of 1.36 and 3.11 W, respectively. The output powers of these lasers are the highest reported so far, and this is the first demonstration of scaling the output power of the Pr3+:YLF laser to the watt level at around 696 nm. The experimental phenomena were also explained through theoretical analysis and simulation.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Xudong Li, Yiping Zhou, Haobo Xu, Wang Lu, Rongwei Fan, Deying Chen, Yugang Jiang, Renpeng Yan
Summary: This paper presents a high-stability, high-pulse-energy laser source based on an electrooptically Q-switched Nd:YAG master oscillator power amplifier (MOPA) system with a repetition rate of 2 kHz. The use of a multi-segment composite Nd:YAG crystal as the gain medium enables the system to achieve a pulse energy of 8.6 mJ and pulse width of 7.8 ns. By employing two laser diode end-pumped Nd:YAG amplifiers, the pulse energy is amplified to 28.6 mJ, corresponding to a peak power of 3.7 MW. Further frequency doubling with LiB3O5 (LBO) generates laser pulses with an energy of 13.2 mJ and pulse width of 6.4 ns at 532 nm. The laser system exhibits high stability with a coefficient of variation (CV) of the pulse energy of 2.6% over a temperature range of -40 degrees C to 55 degrees C, and is suitable for airborne remote sensing.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Li Zheng, Wenlong Tian, Han Liu, Geyang Wang, Chuan Bai, Rui Xu, Dacheng Zhang, Hainian Han, Jiangfeng Zhu, Zhiyi Wei
Summary: A 2-GHz high-power Kerr-lens mode-locked Yb:KGW laser pumped by a single-mode fiber laser was reported. Stable bidirectional and unidirectional mode-locking operations were achieved with different output coupling rates, resulting in high average output powers and short pulse durations. This represents the highest average power from Kerr-lens mode-locked GHz femtosecond oscillators to date.
Article
Optics
Zhiqiang Wang, Aurelien Coillet, Said Hamdi, Zuxing Zhang, Philippe Grelu
Summary: Period doubling is a universal bifurcation phenomenon that indicates the existence of chaotic dynamics in the vicinity of system parameters. This article presents a variety of bifurcation sequences related to spectral pulsations in dissipative solitons, using real-time spectral characterization techniques and numerical simulations. The experiments show that self-phase modulation triggers period-2 bifurcations, and ramping up the pump power leads to more complex bifurcations and entrainment phenomena. These findings provide a general understanding of period-doubling bifurcations in ultrafast laser systems and their combinations with complex bifurcations observable from the spectral domain.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Jonathan N. Tinsley, Satvika Bandarupally, Jussi-Pekka Penttinen, Shamaila Manzoor, Sanna Ranta, Leonardo Salvi, Mircea Guina, Nicola Poli
Summary: This study achieved the generation of high-power, narrow-linewidth laser radiation for laser cooling and spectroscopy of cadmium and strontium atoms. Utilizing VECSEL frequency doubling, laser outputs at 457.75nm and 460.86nm were successfully produced.
