Article
Materials Science, Multidisciplinary
Longqi Xiao, Hanyu Xiao, Yidong Huang, Yanfu Lin, Jianhua Huang, Xinghong Gong, Zundu Luo, Yujin Chen
Summary: In this study, a Nd:GdPO4 single crystal was grown by the top-seeded solution method, and its polarized absorption and fluorescence spectra were analyzed based on the Judd-Ofelt theory. The effects of energy transfer and energy migration on the fluorescence lifetime of Nd3+ were discussed, along with an investigation into the concentration-dependent fluorescence quenching effect. The Nd:GdPO4 crystal exhibited a 1060 nm laser output with peak power of 1.12 W and a slope efficiency of 21.9% when end-pumped by a quasi-continuous-wave 790 nm laser diode with an absorbed pump peak power of 5.39 W.
Article
Optics
Yuxia Zhang, Liang Dong, Wenjuan Han, Honghao Xu, Degao Zhong, Junhai Liu
Summary: We present the performance of a Yb:YPO4 microchip laser with a 2D WS2 saturable absorber, which shows high efficiency operation in both continuous-wave (CW) and passive Q-switching mode. The laser generated a CW output power of 3.81 W with an optical conversion efficiency of 60.5% and a slope efficiency of 71% when absorbing 6.30 W of pump power. In the passive Q-switching mode, a pulsed output power of 1.67 W was achieved at a repetition frequency of 660 kHz, with a slope efficiency of 52%. By using different output mirrors, pulse energy, pulse width, and peak power of 2.52 μJ, 67 ns, and 31.7 W, respectively, were obtained. These results represent a significant improvement in the CW and passive Q-switching performance of Yb:YPO4 microchip lasers.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Baikun Han, Hanyu Xiao, Yujin Chen, Jianhua Huang, Xinghong Gong, Yanfu Lin, Zundu Luo, Yidong Huang
Summary: A Yb3+:Ca3TaGa3Si2O14 single crystal was grown and its spectral properties were measured at room temperature. The crystal shows potential as a gain medium for tunable and ultrashort pulse lasers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Lincong Rao, Yujin Chen, Jianhua Huang, Xinghong Gong, Yanfu Lin, Zundu Luo, Yidong Huang
Summary: An Er:Yb:YSr3(PO4)(3) single crystal grown by the Czochralski method exhibited strong absorption at 975 nm and a broad emission band. Efficient energy transfer allowed for high power laser output at 1565 nm with good slope efficiency.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Haifeng Lin, Zhanglang Lin, Yujin Chen, Yidong Huang, Ge Zhang, Weidong Chen
Summary: This study demonstrates a comprehensive characterization of the diode-pumped Yb:Bi4Si3O12 laser in continuous-wave and soliton mode-locked regimes, achieving high output powers and efficiencies in both modes of operation. The use of SESAM as a mode locker enabled the generation of nearly transform-limited pulses with short durations.
Article
Optics
Jingyao Lu, Fei Zheng, Shuxuan Cao, Yang Che, Jianhong Li, Shijia Sun, Jia Gao, Chen Hu, Bing Teng, Jiaqi Zhao, Ruyi Sun, Degao Zhong
Summary: A new mixed orthophosphate crystal was grown by high temperature solution method, and its crystal structure, optical properties, and laser performance were investigated. The results showed that the crystal had high continuous wave output power and efficiency, and its wide emission spectrum indicated potential applications in generating mode-locked femtosecond pulsed lasers.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Applied
Wenxiang Huang, Shiyu Hu, Junjie Tu, Lifang Zhang, Kekai Tao, Peng Wang
Summary: In this work, a continuous-wave InAs-based interband cascade laser emitting at a wavelength of 4.58 μm is reported. The laser operates at high temperatures, with a maximum temperature of 64 degrees C achieved, which is 29 degrees C higher than previously reported values for similar lasers. At 20 degrees C, an output power of 20 mW was obtained using a 10-μm x 2-mm ridge waveguide device with one facet coated for high reflection and epilayer-down mounting.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Yuxin Pan, Bei Liu, Jian Liu, Qingsong Song, Jie Xu, Dongzhen Li, Peng Liu, Jie Ma, Xiaodong Xu, Hui Lin, Jun Xu, Kheirreddine Lebbou
Summary: Nd:SrAl11O19 (Nd:SRA) crystal was grown by Czochralski method for its optical properties and laser output performance study. The results showed that the crystal exhibited good absorption and emission properties at specific wavelengths, making it a promising material for laser applications. It was also found that the c-cut sample of the crystal had high output power and slope efficiency.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Huangjun Zeng, Wenze Xue, Robert T. Murray, Weidong Chen, Zhongben Pan, Li Wang, Chen Cui, Pavel Loiko, Xavier Mateos, Uwe Griebner, Valentin Petrov
Summary: In this study, we investigated the in-band pumping of a Tm,Ho,Lu:CaGdAlO4 laser using a Raman-shifted Er-fiber laser. We achieved high output power and wide wavelength tuning range in the continuous-wave regime and high repetition rate pulse output in the mode-locked regime.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Shumpei Katsuno, Takuya Inoue, Masahiro Yoshida, Menaka De Zoysa, Kenji Ishizaki, Susumu Noda
Summary: The research developed a self-consistent theoretical model for simulating the lasing characteristics of PCSELs under CW operation, showing that the spatial distribution of the band-edge frequency affects the lasing band-edge selectivity and beam quality. It was also demonstrated that single-mode lasing with narrow beam divergence can be achieved by introducing a photonic-crystal structure with an artificially formed lattice constant distribution.
Article
Materials Science, Multidisciplinary
G. D'Arrigo, M. Scuderi, A. Mio, G. Favaro, M. Conte, A. Sciuto, M. Buscema, G. Li-Destri, E. Carria, D. Mello, M. Calabretta, A. Sitta, J. Pries, E. Rimini
Summary: Crystalline micrometer size stripes were produced in Ge2Sb2Te5 phase-change material films by irradiation with a 405 nm Continuous Wave Laser, and their mechanical properties were characterized using nanoindentation technique.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Guangda Wu, Mengdi Fan, Linyu Bai, Zhengping Wang, Fapeng Yu, Xiufeng Cheng, Xian Zhao
Summary: A high crystalline quality YSr3(PO4)3 (Er:YSP) single crystal with a heavy concentration (30 mol%) of Er3+ ion was grown using the Czochralski pulling method. The crystal structure was determined to be a cubic system with the point group 43m. The absorption and fluorescence spectra were analyzed, showing intense absorption at 974 nm and an emission band centered at about 3090 nm with a broad full width half-maximum of 140 nm. The crystal demonstrated potential as a laser medium for the - 3μm region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Peifu Wang, Kuan Li, Yicheng Jin, Ke Zhang, Ning Zhang, Bo Chen, Lulu Dong, Yongguang Zhao, Shande Liu, Xiaodong Xu
Summary: We report on the spectral properties and high-efficiency broadband laser operation of a Tm:CaY0.9Gd0.1AlO4 (Tm:CYGA) crystal. The crystal exhibits broad absorption and emission spectra, offering a smooth gain band. A maximum continuous-wave laser output power of 1.43 W at 1967.8 nm, corresponding to a slope efficiency of 42.2%, is achieved with an absorbed pump power of 4.35 W. A tunable Tm:CYGA laser with a tuning range of 284.7 nm from 1837.5 to 2122.2 nm is realized using a birefringent filter (BF). The results demonstrate the potential of the Tm:CYGA crystal for generating high-efficiency broadband CW laser and ultrashort pulses in the 2-μm spectral range.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Dongzhen Li, Jian Liu, Xiaodong Xu, Peng Liu, Changwen Xu, Jian Zhang, Jun Xu
Summary: Spectral and fluorescence measurements were conducted on a mixed sesquioxide Nd:LuYO3 ceramic, revealing its absorption and emission characteristics. Laser operation was successfully demonstrated with potential applications in various fields.
JOURNAL OF LUMINESCENCE
(2021)
Article
Crystallography
Yang Li, Jinteng Zhang, Zhitai Jia, Yue Liu, Hongkun Nie, Baitao Zhang, Xutang Tao
Summary: Crystal growth, thermal properties, spectroscopic characterization, energy-transfer schemes, and continuous wave laser operation of Tm, Ho: GGAG crystal were systematically studied. The crystal showed potential for broadly tunable lasers at around 2 μm.
JOURNAL OF CRYSTAL GROWTH
(2023)
