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Comparative investigation on amplifying performance between 980 nm and 1480 nm pumped bismuth-based EDFA

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中国激光 2009年第3期36卷 558-563页

作者：周亚训盖娜陈芬杨高波 College of Information Science and Engineering Ningbo University Ningbo 315211 China

The population rate and power propagation equations are presented and solved to compare the amplification performances of bismuth-based Er3+-doped fiber amplifier (EDFA) pumped by 980-and 1480-nm lasers,*** both single signal and coarse wavelength-division-multiplexing(CWDM)signals inputs,the 1480-nm pumped bismuth-based EDFA provides a larger signal gain than the 980-nm pumped one does,whereas the latter provides a relatively lower noise figure (NF).Comparative results indicate that the 1480-nm pumping scheme is more advantageous for bismuth-based EDFA regarding the band width and gain property.

关键词： optical communications amplification performances rate equations power propagation equations bismuth-based EDFA

Crossover from Two-to Three-dimensional Superconducting States in bismuth-based Cuprate Superconductor

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Bulletin of the Chinese Academy of Sciences 2019年第4期33卷 239-240页

作者： SUN Liling Institute of Physics CAS

To decipher the mechanism of high temperature superconductivity(SC),it is important to know how the superconducting pairing emerges from the unusual normal states of cuprate superconductors,including pseudogap,anomalous Fermi liquid and strange metal(SM).A long-standing issue under debate is how the superconducting pairing is formed and condensed in the SM phase because the superconducting transition temperature is the highest in this phase.

关键词： Superconducting States bismuth-based Cuprate Superconductor Crossover from Two

Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection

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Chinese Chemical Letters 2024年第6期35卷 185-188页

作者： Xin Dong Jing Liang Zhijin Xu Huajie Wu Lei Wang Shihai You Junhua Luo Lina Li College of Chemistry Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Lead-halide perovskites exhibit outstanding performance in X-ray detection due to their intrinsic features such as high charge carrier mobility,large atomic number,and long carrier lifetime,but the toxicity of lead is regarded as the major factor hindering their ***,we introduce organic molecule(R)-(-)-2-methylpiperazine(R-MPz)into the bismuth-based structure to synthesize lead-free(R)-(H_(2)MPz)BiI_(5)(R-MBI).The high-quality centimeter-sized single crystals have been obtained,which show a low dark current and superior environmental ***,the single-crystal device of R-MBI exhibits a highμτproduct up to 1.88×10^(-4)cm^(2)/V and a low trap density of 1.21×10^(10)cm^(-3).Further,the detector displays excellent detection sensitivity of 263.58μC Gy_(air)^(-1)cm^(-2)and a favorable low detection limit of 4.35μGyair/s,both of which meet the requirement for medical *** findings shed light on the exploration of innovative bismuth-based hybrid perovskites for high-performance X-ray detection.

关键词： Perovskite Lead-free bismuth-based X-ray detection Sensitivity