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Journal of Advanced Ceramics 2020年第5期9卷 588-594页

作者： Cuijin PEI Jingjing TAN Yang LI Guoguang YAO Yanmin JIA zhaoyu ren Peng LIU Huaiwu ZHANG School of Science Xi’an University of Posts and TelecommunicationsXi’an 710121China School of Physics Northwest UniversityXi’an 710069China College of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China

The non-stoichiometric Li_(3)Mg_(2)Sb_(1-x)O_(6)(0.05≤x≤0.125)compounds have been prepared via the mixed oxide *** influences of Sb nonstoichiometry on the sintering behavior,microstructure,phase composition along with microwave dielectric performances for Li_(3)Mg_(2)Sb_(1-x)O_(6) ceramics were *** with X-ray diffraction(XRD)and Raman spectra,it was confirmed that phase composition could not be affected by the Sb nonstoichiometry and almost pure phase Li_(3)Mg_(2)SbO_(6) was formed in all *** Sb-deficiency in Li_(3)Mg_(2)SbO_(6) not only lowered its sintering temperature but also remarkably improved its Q×f *** particular,non-stoichiometric Li_(3)Mg_(2)Sb_(0.9)O_(6) ceramics sintered at 1250℃/5 h owned seldom low dielectric constant ε_(r)=10.8,near-zero resonant frequency temperature coefficient τ_(f)=-8.0 ppm/℃,and high quality factor Q×f=86,300 GHz(at 10.4 GHz).This study provides an alternative approach to ameliorate its dielectric performances for Li_(3)Mg_(2)SbO_(6)-based compounds through defect-engineering.

关键词： microwave dielectric properties ceramics sintering antimony compounds

Tricolor white emitting phosphor co-doped with Eu,Dy in SiO_2 matrix

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Chinese Science Bulletin 2008年第22期53卷 3491-3496页

作者： HU XiaoYun FAN Jun ZHANG DeKai MA YiPing BAI JinTao ren zhaoyu HOU Xun Department of Physics Northwest University Xi'an 710069 China School of Chemical Engineering Northwest University Xi'an 710069 China Institute of Photonics & Photon-Technology Provincial Key Laboratory of Photo Electronic Technology Northwest University Xi'an 710069 China State Key Laboratory of Transient Optics and Technology Xi'an Institute of Optics & Precision Mechanics Chinese Academy of Sciences Xi'an 710068 China

A Eu, Dy co-doped SiO2 matrix, white emitting phosphor was prepared by the sol-gel technique. Strong red, green and blue emissions located at 618 nm, 573 nm and 400-550 nm were observed under UV laser excitation at room temperature. Such techniques as FT-IR and TGA-DSC were used to measure the microstructure of the luminescent material. The influence of the preparation techniques on the luminescence property of the Eu, Dy co-doped SiO2 matrix, such as anneal temperature, anneal time, dried atmosphere and the components of the matrix, was systematically studied, and the luminescence mechanism was interpreted. The red emission is the strongest when annealed at 750 ℃ . However, blue emission appears when annealed at 700 ℃ and is the intensest at 900℃ . For the samples dried in vacuum, Eu3+ is more easily deoxidized to Eu2+ at lower temperatures, because the samples dried in the air compared with that dried in vacuum need higher temperature to form network structures. Only the SA and SAB matrix annealed at 850 ℃ had blue emission in the four matrices (SA, SAB, SB, S) xerogel and the emission in the SAB matrix was stronger than that in the SA matrix. This may be due to the eutectic phase formed by the oxide boron, alkaline oxide and alumina in the SAB matrix, which constructs network structures and stabilizes the emission center and enhances the blue emission.

关键词：白光水解溶胶无机发光材料稀土二氧化硅

Novel trichromatic phosphor Co-doped with Eu, Tb in SiO_2 gel matrix

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Chinese Science Bulletin 2007年第4期52卷 444-449页

作者： HU XiaoYun FAN Jun LI Ting ZHANG DeKai BAI Jinmao ren zhaoyu HOU Xun Department of Physics Northwest University Xi'an 710069 China Chemical Engineering College Northwest University Xi'an 710069 China Institute of Photonics & Photon-Technology and Provincial Key Laboratory of Photo Electronic Technology Northwest University Xi'an 710069 China State Key Laboratory of Transient Optics and Technology Xi'an Institute of Optics & Precision Mechanics Chinese Academy of Sciences Xi'an 710068 China

The Eu, Tb co-doped SiO2 matrix tricolor fluorescence system was prepared by sol-gel technique. Red emission at 618 nm, green emission at 543 nm and blue emission at 350―500 nm were observed in the PL spectra of the sample, indicating that Eu3+, Eu2+ and Tb3+ ions coexisted in the matrix. In the co-doped sample, the blue emission of Eu2+ was much stronger than that of the sample single doped with Eu, which implied that the electron transfer between Eu3+ and Tb3+ maybe happened in the SiO2 matrix. The influences of the annealing temperature and Tb concentration on the PL spectra of the samples were investigated. The optimal doped concentration of Tb was determined to be 0.2% and the optimal annealing temperature 850℃. Annealed at 600℃, Tb3+ had a sensitizing effect on Eu3+ in the SiO2 matrix, and the emission intensity of Eu3+ in the Eu, Tb co-doped sample was more than four times that of the single doped sample, which could be attributed to the energy transfer from Tb3+ to Eu3+.

关键词：二氧化硅凝胶基质三原色荧光系统稀土铕铽磷光粉共掺杂电子传递能量传递

Bovine Serum Albumin Detection by Graphene Oxide Coated Long-Period Fiber Grating

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Photonic Sensors 2022年第3期12卷 48-57页

作者： Ruiduo WANG Hao WU Mei QI Jing HAN zhaoyu ren The State Key Laboratory of Photoelectric Technology and Functional Materials International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics&Photon TechnologyNorthwest UniversityXi’an 710127China The State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China The School of Information Science and Technology Northwest UniversityXi’an 710127China

A biosensor for bovine serum albumin(BSA)detection by graphene oxide(GO)functionalized micro-taped long-period fiber grating(GMLPG)was *** amide bond connected between the GO and BSA enabled the BSA to attach onto the fiber surface,which changed the effective refractive index of the cladding mode and characterized the concentration of the *** real-time monitoring system demonstrated a sensing sensitivity of 1.263 nm/(mg/mL)and a detection limit of 0.043 mg/***,it illustrated superior measurement performance of higher sensitivity in the presence of glucose and urea as the interference,which showed static sensitivities of~1.476 nm/(mg/mL)and 1.504 nm/(mg/mL),*** proposed GMLPG demonstrated a great potential for being employed as a sensor for biomedical and biochemical applications.

关键词： Graphene oxide bovine serum albumin biosensor

Single-scan polarization-resolved degenerate four-wave mixing spectroscopy using a vector optical field

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Photonics Research 2022年第1期10卷 230-236页

作者： JIAQI YUAN XUEMEI CHENG XING WANG TENGFEI JIAO zhaoyu ren State Key Laboratory of Photon-Technology in Western China Energy International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics&Photon-TechnologyNorthwest UniversityXi’an 710069China State Key Laboratory of Transient Optics and Photonics Chinese Academy of SciencesXi’an 710119China

We report on a new method to achieve the single-scan polarization-resolved degenerate four-wave mixing(DFWM)spectroscopy in a Rb atomic medium using a vector optical field,in which two pump beams are kept linearly polarized and a vector beam is employed as the probe *** the polarization and intensity of the DFWM signal are closely dependent on the polarization state of the probe beam,a vector probe beam with space-variant states of polarization is able to generate a DFWM signal with space-variant states of polarization and intensity across the DFWM ***,the polarization-resolved spectra can be retrieved from a single DFWM *** the best of our knowledge,this is the first time that the single-scan polarizationresolved spectrum detection has been realized experimentally with a vector *** work provides a simple but efficient single-scan polarization-resolved spectroscopic method,which would be of great utility for the samples of poor light stability and fast optical processes.

关键词： resolved mixing degenerate

Stimulated Brillouin scattering induced all-optical modulation in graphene microfiber

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Photonics Research 2019年第1期7卷 8-13页

作者： JIWEN ZHU XUEMEI CHENG YALI LIU RUIDUO WANG MAN JIANG DIAO LI BAOLE LU zhaoyu ren State Key Lab Incubation Base of Photoelectric Technology and Functional Materials National Photoelectric Technology and Functional Materials& Application International Cooperation Center Institute of Photonics & Photon-Technology Northwest University

Graphene microfibers are burgeoning modulators with great potential in all-optical communication. One of the critical issues that remains to be understood is the dynamic mechanism of light–graphene interaction. Here, we propose a power dependent modulation by using 980 nm pump light and 1064 nm signal light via graphene microfiber, and the results show a strong transmission reduction and frequency blue shift with the increase of pump power. The experimental observation is attributed to a stimulated Brillouin scattering process induced by the pump light. Power and frequency variations are a result of energy transition of the scattered phonon in the fiber. This work reveals the nonlinear effect process in the light–graphene interaction and provides a new method for power and frequency control with graphene all-optical modulation.

关键词： Graphene microfibers burgeoning modulators great potential

Enhancement of phase conjugation degenerate four-wave mixing using a Bessel beam

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Photonics Research 2018年第3期6卷 162-167页

作者： QIAN ZHANG XUEMEI CHENG HAOWEI CHEN Bo HE zhaoyu ren YING ZHANG JINTAO BAI State Key Laboratory Incubation Base of Photoelectric Technology and Functional Materials National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation CenterInstitute of Photonics&Photon-TechnologyNorthwest UniversityXi'an 710069China School of Science Engineering University of PAPXi'an 710086China

We report on the enhancement of phase conjugation degenerate four-wave mixing(DFWM) in hot atomic Rb vapor by using a Bessel beam as the probe beam. The Bessel beam was generated using cross-phase modulation based on the thermal nonlinear optical effect. Our results demonstrated that the DFWM signal generated by the Bessel beam is about twice as large as that generated by the Gaussian beam, which can be attributed to the extended depth and tight focusing features of the Bessel beam. We also found that a DFWM signal with reasonable intensity can be detected even when the Bessel beam encounters an obstruction on its way, thanks to the selfhealing property of the Bessel beam. This work not only indicates that DFWM using a Bessel beam would be of great potential in the fields of high-fidelity communication, adaptive optics, and so on, but also suggests that a Bessel beam would be of significance to enhance the nonlinear process, especially in thick and scattering media.

关键词： Enhancement of phase conjugation degenerate four-wave mixing using a Bessel beam

Study of High-Order Harmonic at VUV/XUV

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Chinese Journal of Lasers 1996年第3期 224-229页

作者： ZHUANG Dounan LEI Shizhan YU Guiqiu ren zhaoyu MA Jingmin(Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800)

Ｓｔｕｄｙ　ｏｆ　Ｈｉｇｈ－Ｏｒｄｅｒ　Ｈａｒｍｏｎｉｃ　ａｔ　ＶＵＶ／ＸＵＶＳｔｕｄｙｏｆＨｉｇｈ－ＯｒｄｅｒＨａｒｍｏｎｉｃａｔＶＵＶ／ＸＵＶ￥ＺＨＵＡＮＧＤｏｕｎａｎ；ＬＥＩＳｈｉｚｈａｎ；ＹＵＧｕｉｑｉｕ；Ｒ... 详细信息

Ｓｔｕｄｙ　ｏｆ　Ｈｉｇｈ－Ｏｒｄｅｒ　Ｈａｒｍｏｎｉｃ　ａｔ　ＶＵＶ／ＸＵＶＳｔｕｄｙｏｆＨｉｇｈ－ＯｒｄｅｒＨａｒｍｏｎｉｃａｔＶＵＶ／ＸＵＶ￥ＺＨＵＡＮＧＤｏｕｎａｎ；ＬＥＩＳｈｉｚｈａｎ；ＹＵＧｕｉｑｉｕ；ＲＥＮＺｈａｏｙｕ；ＭＡＪｉｎｇｍｉ...

关键词： high-order harmonics VUV/XUV coherent light nonlinear gas medium

Enhanced Emission of Eu^(3+) in Boron Ions-Doped Sol-Gel SiO_2 Phosphors

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Journal of Rare Earths 2005年第6期23卷 705-705页

作者： Hu Xiaoyun Fan Jun Bai Jintao ren zhaoyu Hou Xun Institute of Photonics ＆ Photon-Technology Northwest University Xi＇ an 710069 China Department of Physics Northwest University Xi＇an 710069 China Chemical Engineering College Northwest University Xi＇an 710069 China State Key Laboratory of Transient Optics and Technology Xi＇an Institute of Optics ＆ Precision Mechanics Academy of Sciences of China Xi＇an 710068 China

Al-doped and B, Al-codoped silica xerogel was fabricated by sol-gel process. The influence of B ions and annealing temperature on luminescent properties of phosphors were studied by using fluorescence spectrum, X-ray diffraction, DSC, TG/DTG analysis and IR spectrum. The heat treatment has a large effect on the luminescent properties. Under 248 nm excitation, the emission spectrum of samples heated shows characteristic emission peaks of Eu^3＋ ions are, which are due to the transitions of ^5D0→^7FJ（J = 0, 1, 2, 3, 4） of Eu^3＋ , respectively. The transition of ^5D0→^7F1 is split into two peaks.

关键词： Boron ions sol-gel method luminescent properties (Eu^3+,Eu^2+,SiO2)xerogel rare earths

基于石墨烯全光调制的主/被动调Q光纤激光器(特邀)

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光子学报 2022年第10期51卷 87-95页

作者：王天祺李对对刘贝贝江曼孙志培任兆玉西北大学光子学与光子技术研究所西安710127 省部共建西部能源光子技术国家重点实验室西安710127 阿尔托大学电子与纳米工程系芬兰埃斯波FI-02150

报道了一种基于石墨烯全光调制器的主/被动调Q光纤激光器。石墨烯调制器不仅可以作为激光腔中的被动调Q器件,还可以作为全光调制器件。引入另一束被周期性调制的激光通过石墨烯调制器,以改变石墨烯在激光腔内的饱和吸收特性实现对激光... 详细信息

报道了一种基于石墨烯全光调制器的主/被动调Q光纤激光器。石墨烯调制器不仅可以作为激光腔中的被动调Q器件,还可以作为全光调制器件。引入另一束被周期性调制的激光通过石墨烯调制器,以改变石墨烯在激光腔内的饱和吸收特性实现对激光脉冲的调制。该石墨烯调Q激光器具有全光纤结构、重复频率精确可控等优点。在不改变激光器泵浦功率的情况下,通过主动改变调制光的重复频率,获得了与调制光重复频率一致的调Q脉冲输出。此外,调制器采用不同透过率的石墨烯薄膜获得了不同的调制深度,调制深度越大,输出脉冲的重复频率变化范围越大(最大范围为31.6~92.6 kHz),并且精确可调。这对选用合适调制深度的石墨烯调制器具有重要的参考意义。

关键词：石墨烯全光调制主/被动调Q 脉冲重复频率调制深度光纤激光器

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