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| 1 | Photonic integrated technology for multi-wavelength laser emission显示文摘We summarized the design, fabrication challenges and important technologies for multi-wavelength laser transmitting photonic integration. Technologies discussed include multi-wavelength laser arrays, monolithic integration and modularizing coupling and packaging. Fabrication technique requirements have significantly declined with the rise of reconstruction-equivalent-chirp and second nanoimprint mask technologies. The monolithic integration problem between active and passive waveguides can be overcome with Butt-joint and InP array waveguide grating technologies. The dynamic characteristics of multi-factors will be simultaneously measured with multi-port analyzing modules. The performance of photonic integration chips is significantly improved with the autoecious factors compensation packaging technique. | CHEN XiangFei LIU Wen AN JunMing LIU Yu XU Kun WANG Xin LIU JianGuo JI YueFeng ZHU NingHua | 2011 | Chinese Science Bulletin2011，56，28： | 9 |
| 2 | Recent advances in microwave photonics显示文摘微波 photonics (MWP ) 是联合微波工程和 photonics 的二个不同区域的一块学科交差的地。它由转移在光域和微波领域之间的信号有几特色,它为产生导致宽广操作带宽的优点,处理,微波的分发发信号并且为光光谱测量的高分辨率。在这篇论文,我们包括地由从大多数活跃 MWP 研究组介绍代表性的工作在中国考察过去和 MWP 的当前的地位。未来未来也从国家策略被讨论给我们开发了的创新技术调音。 | Ming LI Ninghua ZHU | 2016 | Frontiers of Optoelectronics2016，9，2： | 7 |
| 3 | Simulation of the spin-boson model with superconducting phase qubit coupled to a transmission line显示文摘Based on the rapid experimental developments of circuit QED,we propose a feasible scheme to simulate the spin-boson model with superconducting circuits,which can be used to detect quantum Kosterlitz-Thouless(KT) phase transition.We design the spinboson model by using a superconducting phase qubit coupled to a semi-infinite transmission line,which is regarded as a bosonic reservoir with a continuum spectrum.By tuning the bias current or the coupling capacitance,the quantum KT transition can be directly detected through tomography measurement on the states of the phase qubit.We also estimate the experimental parameters using the numerical renormalization group method. | YU LongBao TONG NingHua XUE ZhengYuan WANG ZiDan ZHU ShiLiang | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，9： | 6 |
| 4 | Overall optimization of high-speed semiconductor laser modules显示文摘Based on the high frequency techniques such as frequency response measurement,equivalent circuit modeling and packaging parasitics compensation,a comprehensive optimization method for packaging high-speed semiconductor laser module is presented in this paper.The experiments show that the small-signal magnitude frequency response of the TO packaged laser module is superior to that of laser diode in frequencies,and the in-band flatness and the phase-frequency linearity are also improved significantly. | LIU Yu CHEN ShuoFu WANG Xin YUAN HaiQing XIE Liang ZHU NingHua | 2009 | Chinese Science Bulletin2009，54，20： | 6 |
| 5 | Observation of parity-time symmetry in microwave photonics显示文摘Symmetry plays a crucial role in explorations of the laws of nature.Parity-time(PT)symmetry phenomena can lead to entirely real spectra in non-Hermitian systems,which attracts considerable attention in the fields of optics and electronics because these phenomena provide a new tool for the manipulation of oscillation modes and nonreciprocal signal transmission.A potential new field of application is microwave photonics,an interdisciplinary field in which the interaction between microwaves and optical signals is exploited.In this article,we report the experimental use of PT symmetry in an optoelectronic oscillator(OEO),a key microwave photonics system that can generate singlefrequency sinusoidal signals with high spectral purity.PT symmetry is theoretically analyzed and experimentally observed in an OEO with two mutually coupled active oscillation cavities via a precise manipulation of the interplay between gain and loss in the two oscillation cavities.Stable single-frequency microwave oscillation is achieved without using any optical/electrical filters for oscillation mode selection,which is an indispensable requirement in traditional OEOs.This observation opens new avenues for signal generation and processing based on the PT symmetry principle in microwave photonics. | Yanzhong Liu Tengfei Hao Wei Li Jose Capmany Ninghua Zhu Ming Li | 2018 | Light(Science & Applications)2018，7，1： | 5 |
| 6 | Experimental optimization of phase noise performance of optoelectronic oscillator based on directly modulated laser显示文摘The experimental optimization of a 10 GHz optoelectronic oscillator (OEO) based on a 1.55 μm directly modulated distributed feedback (DFB) laser is demonstrated in this paper. The phase noise of the directly modulated laser (DML) based OEO is significantly reduced by proper selection of the laser's bias current and by using a dispersion shifted fiber as a delay line. The phase noise performance of the DML OEO achieved after optimization is close to that of a conventional OEO constructed using a commercial DFB laser and a LiNbO 3 Mach-Zehnder modulator. The DML based OEO is most promising for future realization of a miniature OEO architecture with the components integrated on a semiconductor substrate. | WANG LiXian ZHU NingHua LIU JianGuo LI Wei ZHU HongLiang WANG Wei | 2012 | Chinese Science Bulletin2012，57，31： | 4 |
| 7 | Calibration of microwave network analyzer显示文摘This paper presents a systematic description of the methods for calibrating microwave network analyzer and test fixtures, and discusses the problems arising in the calibration. The general criteria for choosing calibration standards and corresponding algorithms are discussed and suggestions to overcome these problems and improve the calibration accuracy are also given. It has been found that for reciprocal test fixtures, the four equations obtained with the thru standard can be used at the same time. Meanwhile,the calibration accuracy can be improved. It has been shown that using the same calibration procedures but different algorithms may lead to the occurrence of frequency limitation. | ZHU Ninghua WANG Youlin CHEN Zhenyu | 2004 | Science China(Technological Sciences)2004，47，2： | 4 |
| 8 | Ultra-low V_(pp)and high-modulation-depth InP-based electro-optic microring modulator显示文摘A modulator is an essential building block in the integrated photonics,connecting the electrical with optical signals.The microring modulator gains much attention because of the small footprint,low drive voltage and high extinction ratio.An ultra-low V_(pp)and high-modulation-depth indium phosphide-based racetrack microring modulator is demonstrated in this paper.The proposed device mainly comprises one racetrack microring,incorporating a semiconductor amplifier,and coupling with a bus waveguide through a multimode interference coupler.Traveling wave electrodes are employed to supply bidirectional bias ports,terminating with a 50-Ω impedance.The on/off extinction ratio of the microring reaches 43.3 dB due to the delicately tuning of the gain.An 11 mV V_(pp),a maximum 42.5 dB modulation depth and a 6.6 GHz bandwidth are realized,respectively.This proposed microring modulator could enrich the functionalities and designability of the fundamental integrated devices. | Dapeng Liu Jian Tang Yao Meng Wei Li Ninghua Zhu Ming Li | 2021 | Journal of Semiconductors2021，42，8： | 3 |
| 9 | Reconfigurable single-shot incoherent optical signal processing system for chirped microwave signal compression显示文摘We propose and demonstrate a reconfigurable and single-shot incoherent optical signal processing system for chirped microwave signal compression, using a programmable optical filter and a multiwavelength laser(MWL). The system is implemented by temporally modulating a specially shaped MWL followed by a suitable linear dispersive medium. A microwave dispersion value up to 1.33 ns/GHz over several GHz bandwidth is achieved based on this approach. Here we demonstrate a singleshot compression for different linearly chirped microwave signals over several GHz bandwidth. In addition, the robustness of the proposed system when input RF signals are largely distorted is also discussed. | Ming Li Shuqian Sun Antonio Malacarne Sophie LaRochelle Jianping Yao Ninghua Zhu Jose Azana | 2017 | Science Bulletin2017，62，4： | 3 |
| 10 | A selective area growth double stack active layer electroabsorption modulator integrated with a distributed feedback laser显示文摘A new method for fabricating electroabsorption modulator integrated with a distributed feedback laser(EML) was proposed.With the method we fabricated a selective area growth double stack active layer EML(SAG-DSAL-EML).Through comparing with other fabrication methods of EMLs,the characters and the merits of the new method presented in this paper were discussed. | ZHU HongLiang LIANG Song ZHAO Ling Juan KONG DuanHua ZHU NingHua WANG Wei | 2009 | Chinese Science Bulletin2009，54，20： | 3 |
| 11 | Compact packaging for multi-wavelength DML TOSA显示文摘A compact multi-wavelength hybrid-integrated directly-modulated distributed-feedback laser(DML)transmitter optical sub-assembly(TOSA)has been achieved in our laboratory.The 8-channel distributed feedback(DFB)lasers are monolithically integrated based on the reconstruction-equivalent-chirp(REC)technology.With the high-density and high-speed packaging technique,the laser array and a multi-mode interference(MMI)multiplexer are assembled in the TOSA.The channel spacing of the TOSA is 200 GHz between adjacent lasers.It meets the 8 9 12.5 Gb/s operation demand and gives rather low channel crosstalk of less than-25 dB.This compact TOSA is of effective cost and shows good stability for mass production,which is expected to improve the performance of devices in access networks,data centers and supercomputing. | Jiasheng Wang Yu Liu Xiangfei Chen Jianguo Liu Ninghua Zhu | 2014 | Chinese Science Bulletin2014，59，20： | 3 |
| 12 | Optical length-change measurement based on an incoherent single-bandpass microwave photonic filter with high resolution显示文摘An optical length-change measurement technique is proposed based on an incoherent microwave photonic filter(MPF).The optical length under testing is inserted into an optical link of a single-bandpass MPF based on a polarization-processed incoherent light source.The key feature of the proposed technique is to transfer the length measurement in the optical domain to the electrical domain.In the electrical domain,the measurement resolution is extremely high thanks to the high-resolution measurement of microwave frequency response.In addition,since the MPF is a single-bandpass MPF,the optical length is uniquely determined by the central frequency of the MPF.A detailed investigation of the relation between the center frequency of the MPF and the optical length change is implemented.A measurement experiment is also demonstrated,and the experimental results show that the proposed technique has a measurement sensitivity of 1 GHz/mm with a high length-measurement resolution of 1 pm in theory.The proposed approach has the advantages of high sensitivity,high resolution,and immunity to power variation in electronic and optical links. | Ye Deng Ming Li Ningbo Huang Hui Wang Ninghua Zhu | 2014 | Photonics Research2014，2，4： | 3 |
| 13 | Recent progresses on optical arbitrary waveform generation显示文摘这份报纸在光任意的波形产生(美国线规) 上考察最近的进步技术,它能被用来为波形产生打破电子学技术的速度和带宽瓶颈。为光学地产生的主要启用技术光并且微波波形在这被介绍并且考察纸例如印射技术的 wavelength-to-time , space-to-time 印射技术,塑造的时间的脉搏( TPS )系统,光电子振荡器( OEO ),可编程的光过滤器,光微分器和综合者和万用的电镀物品眼的调整实现。这些光美国线规技术的主要优点和挑战也被讨论。 | Ming LI Jose AZANA Ninghua ZHU Jianping YAO | 2014 | Frontiers of Optoelectronics2014，7，3： | 2 |
| 14 | Serial time-encoded amplified microscopy for ultrafast imaging based on multi-wavelength laser显示文摘In this paper,a serial time-encoded amplified microscopy(STEAM)by employing a multi-wavelength laser as the light source is proposed and experimentally demonstrated.This system achieves ultrafast optical imaging with a tunable frame rate.The measuring range depends on the spectrum width of the multi-wavelength laser.Through tuning the speed of the modulating signal,the frame rate ranges from 100to 250 MHz.In addition,the spatial resolution can be improved by increasing the group velocity dispersion and reducing the wavelength spacing.Finally,with the development of photonic integrate circuits(PIC),the multi-wavelength laser source has the potential for integration on a photonic chip and thus the size of the proposed STEAM could be reduced in the future. | Ye Deng Ming Li Ningbo Huang JosAzana Ninghua Zhu | 2014 | Chinese Science Bulletin2014，59，22： | 2 |
| 15 | Prevalence rate of osteoporosis in the mid-aged and elderly in selected parts of China显示文摘 | Li Ninghua Ou Pinzhong Zhu Hanmin | 2002 | Clin Med J (Engl)2002，115，5： | 1 |
| 16 | Editor's note显示文摘It is a great honor to present this Special Topic of Chinese Science Bulletin on high-speed optoelectronic devices and technologies. | ZHU NingHua | 2009 | Chinese Science Bulletin2009，54，20： | 1 |
| 17 | Study on the preva- lence of primary osteopomsis in the elderly population in some areas of China显示文摘 | Li Ninghua Zhu Hanmin Ou Pinzhong | 2001 | Chinese Journal of Department of orthopedics2001，5，： | 1 |
| 18 | Analysis of velocity-matched Ti:LiNbO3 optical intensity modulators with an extended point-matching method,Optical and Quantum Electronics显示文摘 | Zhu Ninghua Qiu Wei Edwin Yue Bun Pun | 1996 | 28(2):137-1461996，28，2： | 1 |
| 19 | High-speed photodetectors in optical communication system显示文摘This paper presents a review and discussion for high-speed photodetectors and their applications on optical communications and microwave photonics. A detailed and comprehensive demonstration of high-speed photodetectors from development history, research hotspots to packaging technologies is provided to the best of our knowledge. A few typical applications based on photodetectors are also illustrated, such as free-space optical communications, radio over fiber and millimeter terahertz signal generation systems. | Zeping Zhao Jianguo Liu Yu Liu Ninghua Zhu | 2017 | Journal of Semiconductors2017，38，12： | 1 |
| 20 | Optoelectronic parametric oscillator显示文摘Oscillators are one of the key elements in various applications as a signal source to generate periodic oscillations.Among them,an optical parametric oscillator(OPO)is a driven harmonic oscillator based on parametric frequency conversion in an optical cavity,which has been widely investigated as a coherent light source with an extremely wide wavelength tuning range.However,steady oscillation in an OPO is confined by the cavity delay,which leads to difficulty in frequency tuning,and the frequency tuning is discrete with the minimum tuning step determined by the cavity delay.Here,we propose and demonstrate a counterpart of an OPO in the optoelectronic domain,i.e.,an optoelectronic parametric oscillator(OEPO)based on parametric frequency conversion in an optoelectronic cavity to generate microwave signals.Owing to the unique energy-transition process in the optoelectronic cavity,the phase evolution in the OEPO is not linear,leading to steady single-mode oscillation or multimode oscillation that is not bounded by the cavity delay.Furthermore,the multimode oscillation in the OEPO is stable and easy to realize owing to the phase control of the parametric frequency-conversion process in the optoelectronic cavity,while stable multimode oscillation is difficult to achieve in conventional oscillators such as an optoelectronic oscillator(OEO)or an OPO due to the mode-hopping and mode-competition effect.The proposed OEPO has great potential in applications such as microwave signal generation,oscillator-based computation,and radio-frequency phase-stable transfer. | Tengfei Hao Qizhuang Cen Shanhong Guan Wei Li Yitang Dai Ninghua Zhu Ming Li | 2020 | Light(Science & Applications)2020，9，1： | 1 |
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