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Coexistence of noise-like pulse and dark pulse in an Er/Yb co-doped fiber laser

第十三届全国青年通信学术会议

作者： Wang Jingqing~1 Zhang Jinghui~2 Wang Dong~1 Zou Nianyu~2 ~1 Graduate School,Dalian Polytechnic University,No.1,QingGongYuan,GanJing Zi Dist,DaLian 116034,China DaLian 116034,China ~2 Research Institute of Photonics,Dalian Polytechnic University,No.1,QingGongYuan,GanJingZi Dist,DaLian 116034,China DaLian 116034,China

＜正＞With adopted optical fiber working as amplifying medium,fiber laser has advantages of high beam quality,high gain,and board spectral range and thus has attracted great attention in many *** fixed wavelength and polarization fluctua- tion lay some obstacle for the development and practical *** this work,we investigate the polarization of the fiber laser,and design a fiber laser which can tune the output wavelength and maintain polarization stability by means of a novel cavity.

关键词： fiber laser tunable wavelength stable polarization ring cavity sigma cavity

来源： cnki会议评论

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Chinese Optics Letters 2024年第5期22卷 68-74页

作者：李婧王春灿王鹏 Key Laboratory of All Optical Network and Advanced Telecommunication Network Ministry of EducationInstitute of Lightwave TechnologyBeijing Jiaotong UniversityBeijing 100044China

The coexistence of a noise-like pulse(NLP)and a dark pulse was experimentally demonstrated in a net-anomalous dispersion Er/Yb co-doped fiber(EYDF)laser,for the first time,to our *** cavity was mode-locked by nonlinear polarization rotation(NPR)***,a Sagnac loop with a section of polarization-maintaining fiber(PMF)was used as a comb filter to enable multiwavelength pulse *** the PMF length was 0.3 m,an asymmetric two-peak spectrum with central wavelengths of 1565.3 and 1594.2 nm was obtained by adjusting polarization controllers(PCs).It is a composite state of NLP and dark pulse due to the cross-phase modulation between the two different wavelength components along orthogonal polarization *** two pulses are synchronized with a repetition rate of 7.53 *** adjusting the PC in the Sagnac loop,the spectral ranges of NLPs and dark pulses can be tuned from 1560 to 1577.8 nm and from 1581.8 to 1605.4 nm,*** addition,the pulse characteristics were investigated by incorporating the PMF with different lengths,where the coexistence patterns can be generated when the PMF lengths were 0.2 and 0.3 m.A longer PMF can lead to a narrowband comb filtering,which causes a larger loss and is not favorable for stable operation of the coexistence *** fiber laser demonstrates an interesting operation regime and has significant potential for numerous practical applications.

关键词： coexistence state mode-locked fiber laser Sagnac loop tunable wavelength

Mid-infrared SESAM mode-locked Er:CaF_(2)-SrF_(2)bulk laser at 2.73µm

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Chinese Optics Letters 2024年第5期22卷 85-88页

作者：刘晶晶唐琳萱冯潇玥宗梦雨仝鲁阳张振赵丽娜刘杰苏良碧 Shandong Provincial Engineering and Technical Center of Light Manipulations and Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China CAS Key Laboratory of Transparent and Opto-Functional Inorganic Materials Synthetic Single Crystal Research CenterShanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China

To the best of our knowledge,this is the first time that a mid-infrared Er^(3+):CaF_(2)-SrF_(2) laser has achieved continuous-wave mode-locked operation by a semiconductor saturable absorber *** laser emits a maximum output power of 93 mW at 2.73μm with a repetition rate of approximately 69 MHz and demonstrates a high signal-to-noise ratio of around 71 *** addition,a MgF_(2) birefringent plate was utilized to enable wavelength tuning of the Er^(3+):CaF_(2)-SrF_(2) laser,resulting in operation at approximately 2.73μm,2.75μm,2.79μm,and 2.81μ*** results demonstrate that Er^(3+):CaF_(2)-SrF_(2) is a promising alternative for the generation of efficient diode-pumped mode-locked lasers around 2.8μm.

关键词： mid-infrared laser mode-locked laser tunable wavelength

wavelength-tunable mode-locked Yb-doped fiber laser based on nonlinear Kerr beam clean-up effect

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Chinese Optics Letters 2022年第4期20卷 38-43页

作者：马善超张宝夫何秋润郭靖焦中兴 School of Physics Sun Yat-sen UniversityGuangzhou 510275China School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China School of Opto-Electronics Beijing Institute of TechnologyBeijing 100081China

We demonstrate a novel approach to achieve wavelength-tunable ultrashort pulses from an all-fiber mode-locked laser with a saturable absorber based on the nonlinear Kerr beam clean-up *** saturable absorber was formed by a single-mode fiber spliced to a graded-index multimode fiber,and its tunable band-pass filter effect is described by a numerical *** adjusting the bending condition of the graded-index multimode fiber,the laser could produce dissipative soliton pulses with their central wavelength tunable from 1040 nm to 1063 *** pulse duration of the output laser could be compressed externally to 791 fs,and the signal to noise ratio of its radio frequency spectrum was measured to be 75.5 dB.

关键词： nonlinear Kerr beam clean-up effect tunable wavelength mode-locking numerical simulation

Growth of Yb∶YAB Crystal and Its Laser Performance

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Journal of Rare Earths 2002年第2期20卷 104-107页

作者：李静王继扬胡晓波刘耀岗 JamesPiper PeterDekker StateKeyLaboratoryofCrystalMaterial ShandongUniversityJinan250100China CenterforLasersandApplications MacquarieUniversityNSW2109Australia

Single crystal of Yb x Y 1- x Al 3(BO 3) 4 (Yb∶YAB) was grown by using flux method based on the potassium trimolybdate. 160 mW efficient continuous wave green output was obtained from a fibre coupled 976 nm laser diode. The conversion efficiency is larger than 11 3%, and the electrical input green conversion efficiency is 3 9%. tunable green output from 513 0 to 545 8 nm is also demonstrated with a quartz birefringent filter. By enhancing the incident pump power, 1 1 W cw green output can be reached.

关键词： rare earths laser crystal self frequency doubling crystal tunable wavelength

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