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| 1 | Broadband photonic radio frequency(RF) channelization based on coherent optical frequency combs and polarization I/Q demodulation显示文摘In this work,we analyze and demonstrate a novel photonic-assisted broadband and high-resolution radio frequency(RF) channelization scheme based on dual coherent optical frequency combs(OFCs),regular optical de-muxes,and polarization I/Q demodulators in theory and experiment.The use of two coherent combs avoids precise optical alignment,and a numerical filter in digital signal processor(DSP) enables an ideal rectangular frequency response in each channel without any ultra-narrow optical filters.Besides,due to the use of polarization I/Q demodulation,ambiguous frequency estimate in direct detection can be avoided and the amplitude,phase mismatch in traditional I/Q demodulation can be mitigated.In experiment,we use two coherent OFCs with the free spectrum range(FSR) of about 40 GHz to demonstrate the channelization scheme with seven channels,500 MHz channel spacing and frequency coverage from 3.75 GHz to 7.25 GHz.The input RF tones are accurately down-converted to an intermediate frequency(IF) with a maximum frequency error of 110 kHz.Meanwhile,crosstalk and spurious free dynamic range(SFDR) of the scheme are also discussed. | DAI YiTang XU Kun XIE XiaoJun YAN Li WANG RuiXin LIN JinTong | 2013 | Chinese Science Bulletin2013，58，7： | 5 |
| 2 | Microwave photonics: radio-over-fiber links, systems, and applications [Invited]显示文摘Microwave photonics(MWPs)uses the strength of photonic techniques to generate,process,control,and distribute microwave signals,combining the advantages of microwaves and photonics.As one of the main topics of MWP,radio-over-fiber(RoF)links can provide features that are very difficult or even impossible to achieve with traditional technologies.Meanwhile,a considerable number of signal-processing subsystems have been carried out in the field of MWP as they are instrumental for the implementation of many functionalities.However,there are still several challenges in strengthening the performance of the technology to support systems and applications with more complex structures,multiple functionality,larger bandwidth,and larger processing capability.In this paper,we identify some of the notable challenges in MWP and review our recent work.Applications and future direction of research are also discussed. | Kun Xu Ruixin Wang Yitang Dai Feifei Yin Jianqiang Li Yuefeng Ji Jintong Lin | 2014 | Photonics Research2014，2，4： | 4 |
| 3 | A Detection-Switching-Assisted DCF Mechanism for Simulcast WLAN-over-Fiber Based Distributed Antenna Systems显示文摘Distributed antenna systems(DASs) using Radio-over-fiber(Ro F) links is a promising candidate to provide flexible coverage and high data rates. For simulcast Wireless local-area network(WLAN) use in Ro F systems, the stations covered by different Remote antenna units(RAUs) contend for the wireless medium using Media access control(MAC) mechanism. Severe inter-RAU hidden nodes problem will happen due to the stations in different RAUs cannot detect each other very well. In order to alleviate this inter-RAU collision problem, a promising detection-switching-assisted Distributed coordination function(DCF) mechanism is presented using in the uplink. The control delay issues of the proposed mechanism are also discussed in this paper. | FAN Yuting LI Jianqiang XU Kun DAI Yitang | 2017 | Chinese Journal of Electronics2017，26，4： | 3 |
| 4 | A Review on Fiber Lasers显示文摘After a half century of development, fiber laser has evolved from a concept to a great family penetrating into various fields of applications. This paper reviews the history and current development of fiber lasers, with topics covering both continuous wave and short pulse fiber lasers. Important issues such as the major rare earth dopants, fiber laser brightness, polarization effects, clad pumping technology, beam combination, mode locking and pulse shaping are discussed in this paper. | Lin Jintong Lu Dan Dai Yitang | 2012 | China Communications2012，9，8： | 3 |
| 5 | Preface显示文摘Owing to the fast economic growing and the concern over greenhouse gases and air pollution,the development of nuclear energy is one important option to meet the expanded energy consumption in our future.To achieve that goal,continuing and reliable supplies of uranium are critical to future nuclear power projects.As is well known,global terrestrial reserves of uranium are limited and the deposits in China are relatively small.Given the projected big growth in nuclear power in the future,reliable supply of uranium at a reasonable price is essential for China. | DAI YiTang XU Kun XIE XiaoJun YAN Li WANG RuiXin LIN JinTong | 2013 | Science China Chemistry2013，56，11： | 2 |
| 6 | Optical arbitrary waveform generation based on sampled fiber Bragg gratings显示文摘 | Dai Yitang Chen Xianfei Ji Heng | 2007 | IEEE Photon Teehnol Lett2007，19，23： | 1 |
| 7 | High-performance,high-chip-count optical code division multiple access encoders-decoders based on a reconstruction equivalent-chirp technique显示文摘 | Dai Yitang Chen Xiangfei Sun Jie | 2006 | Optics Letters2006，31，11： | 1 |
| 8 | High chan-nel-count comb filter based on chirped sampled fiber Bragggrating and phase shift 显示文摘 | Dai Yitang Chen Xiangfei Xu Ximing | 2005 | IEEE Photonics Technology Let-ters2005，17，5： | 1 |
| 9 | Dual-wavelength erbium-doped fiber laser with a simple linear cavity and its application in microwave generation显示文摘 | Yu Yao Xiangfei Chen Yitang Dai | 2006 | IEEE Photon Technol Lett2006，18，1： | 1 |
| 10 | Equivalent phase shift in a fiber Bragg grating achieved by changing the sampling period 显示文摘 | Yitang Dai Xiang fei Chen Dianjie Jiang | 2004 | IEEE Photonics Technology Letters2004，16，10： | 1 |
| 11 | Dissipative Soliton in Actively Mode-Locked Fiber Laser 显示文摘 | WANG Ruixin DAI Yitang YAN Ii | 2012 | Optics Express2012，20，6： | 1 |
| 12 | Optical generation of binary phase-coded direct-sequence UWB signals using a multichannel chirped fiber bragg grating 显示文摘 | Dai Yitang Yao Jianping | 2008 | J Lightw Technol2008，26，15： | 1 |
| 13 | High channel-count comb filter based on chirped sampled fiber bragg grating and phase shift 显示文摘 | Dai Yitang Chen Xiangfei Xu Ximing | 2005 | IEEE Photon Technol Lett2005，17，5： | 1 |
| 14 | Tunable dispersion compensation in 40 Gb/s system using a thermally controlled fiber Bragg grating显示文摘 | Jie Sun Yitang Dai Yejin Zhang | 2005 | SPIE2005，6021，： | 1 |
| 15 | 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 |
| 16 | Tunable dispersion compensation in 40 Gb/s system using a thermally controlled fiber Bragg grating显示文摘 | Jie Sun Yitang Dai Yejin Zhang | 2005 | SPIE2005，6021，： | 1 |
| 17 | Digital Joint Compensation of IMD3 and XMD in Broadband Channelized RF Photonic Link显示文摘 | XIE XIAOJUN DAI YITANG XU KUN | 2012 | Optics Express2012，20，25： | 1 |
| 18 | Microwave pulse phase encoding using a photonic microwave delay-line filter 显示文摘 | Dai Yitang Yao Jianping | 2007 | Optics Letters2007，32，24： | 1 |
| 19 | Equivalent Phase Shift in a Fiber Bragg Grating Achieved by Changing the Sampling Period显示文摘 | Yitang Dai Xiangfei Chen Dianjie Jiang Shizhong Xie Chongcheng Fan | 2004 | IEEE PHOTONICS TECHNOLOGY LETTERS2004，16，10： | 1 |
| 20 | Sampled Bragg grating with desired response in one channel by use of a reconstruction algorithm and equivalent chirp显示文摘 | Yitang Dai Xiangfei Chen Li Xia Yejin Zhang and Shizhong Xie | 2004 | OPTICS LETTERS2004，29，12： | 1 |
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