期刊文献+
共找到690篇文章
< 1 2 35 >
每页显示 20 50 100
Robust free-space optical frequency transfer in time-varying link distances conditions
1
作者 童周 刘雷 +6 位作者 王家亮 操前 金志成 应康 韩申生 韩正甫 桂有珍 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第2期271-276,共6页
Future inter-satellite clock comparison on high orbit will require optical time and frequency transmission technology between moving objects.Here,we demonstrate robust optical frequency transmission under the conditio... Future inter-satellite clock comparison on high orbit will require optical time and frequency transmission technology between moving objects.Here,we demonstrate robust optical frequency transmission under the condition of variable link distance.This variable link is accomplished by the relative motion of a single telescope fixed on the experimental platform to a corner-cube reflector(CCR)installed on a sliding guide.Two acousto–optic modulators with different frequencies are used to separate forward signal from backward signal.With active phase noise suppression,when the CCR moves back and forth at a constant velocity of 20 cm/s and an acceleration of 20 cm/s^(2),we achieve the best frequency stability of 1.9×10^(-16) at 1 s and 7.9×10^(-19) at 1000 s indoors.This work paves the way for future studying optical frequency transfer between ultra-high-orbit satellites. 展开更多
关键词 free-space optical frequency transfer variable link distance
原文传递
Concept and Design of a Novel High-Bandwidth,High-Sensitivity Differential Receiver for Optical Interconnections 被引量:1
2
作者 余长亮 毛陆虹 +1 位作者 宋瑞良 肖新东 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第5期903-907,共5页
A novel high-bandwidth, high-sensitivity differential optical receiver without any additional cost compared to general optical receivers, is proposed for high-speed optical communications and interconnections. High ba... A novel high-bandwidth, high-sensitivity differential optical receiver without any additional cost compared to general optical receivers, is proposed for high-speed optical communications and interconnections. High bandwidth and high sensitivity are achieved through a fully differential transimpedance amplifier with balanced input loads and two photodetectors to convert the incident light into a pair of differential photogenerated currents,respectively. In addition,a corresponding 0.35μm standard CMOS optoelectronic integrated receiver with two 60μm × 30μm, 1. 483pF fingered p^+/n- well/p-substrate photodiodes is also presented. The simulation results demonstrate that it achieves a 1.37GHz bandwidth and a 81.9dBΩ transimpedance gain,supporting data rates up to at least 2Gbit/s. The device consumes a core area of 0. 198mm^2 and the optical sensitivity is at least - 13dBm for a 10^-12 bit error rate under a 2^15 - 1 PRBS input signal. 展开更多
关键词 high-bandwidth HIGH-SENSITIVITY CMOS optical receiver
下载PDF
A 10Gb/s GaAs PHEMT High Gain Preamplifier for Optical Receivers
3
作者 焦世龙 杨先明 +5 位作者 赵亮 李辉 陈镇龙 陈堂胜 邵凯 叶玉堂 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2007年第12期1902-1911,共10页
A high gain cascade connected preamplifier for optical receivers is developed with 0.5μm GaAs PHEMT technology from the Nanjing Electronic Devices Institute. To begin with, the transimpedance amplifier has a -3dB ban... A high gain cascade connected preamplifier for optical receivers is developed with 0.5μm GaAs PHEMT technology from the Nanjing Electronic Devices Institute. To begin with, the transimpedance amplifier has a -3dB bandwidth of 10GHz, with a small signal gain of around 9dB. The post-stage distributed amplifier (DA) has a -3dB bandwidth of close to 20GHz,with a small signal gain of around 12dB. As a whole,the cascade preamplifier has a measured small signal gain of 21.3dB and a transimpedance of 55.3dBΩ in a 50Ω system. With a higher signal-to-noise ratio than that of the TIA and a markedly improved waveform distortion compared with that of the DA, the measured output eye diagram for 10Gb/s NRZ pseudorandom binary sequence is clear and symmetric. 展开更多
关键词 GaAs PHEMT optical receiver PREAMPLIFIER eye diagram CASCADE
下载PDF
2.5 Gbit/s monolithic ICs for optical fiber transmitter and receiver in 0.35 μm CMOS process
4
作者 冯军 王志功 +5 位作者 王欢 李连鸣 黄璐 盛志伟 章丽 熊明珍 《Journal of Southeast University(English Edition)》 EI CAS 2005年第3期268-271,共4页
2.5 Gbit/s monolithic integrated circuits (ICs) for optical fiber transmitter and receiver in 0.35 μm CMOS (complementary metal-oxide-semiconductor transistor) process are presented. The transmitter, which includ... 2.5 Gbit/s monolithic integrated circuits (ICs) for optical fiber transmitter and receiver in 0.35 μm CMOS (complementary metal-oxide-semiconductor transistor) process are presented. The transmitter, which includes a 4: 1 multiplexer and a laser diode driver (LDD), has four 622 Mbit/s random signals as its inputs and gets a 2.5 Gbit/s driving signal as its output; the receiver detects a 2.5 Gbit/s random signal and gets four 622 Mbit/s signals at the output. The main circuits include a trans-impedance amplifier (TIA), a limiting amplifier, a clock and data recovery (CDR) unit, and a 1: 4 demultiplexer (DEMUX). Test results prove the logic functions of the transmitter to be right, and the 10% to 90% rise and fall times of transmitter's output data eye diagram are 211.1 ps and 200 ps, respectively. The sensitivity of the receiver is measured to be better than 20 mV. The root mean square jitter of the DEMUX's output data is 15.6 ps and that of the clock after 1: 4 frequency dividing is 1.9 ps. Two chips are both applicable to 2.5 Gbit/s optical fiber communication systems. 展开更多
关键词 optical fiber communication monolithic: transmitter receiver
下载PDF
Relationship Between Noise Figure and Equivalent Input Noise Current Spectral Density for Optical Receiver Design
5
作者 孙玲 王志功 +1 位作者 景为平 高建军 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第12期2085-2088,共4页
Based on the equivalent circuit model of a two-port optical receiver front-end,the relationship between the equivalent input noise current spectral density and the noise figure is analyzed. The derived relationship ha... Based on the equivalent circuit model of a two-port optical receiver front-end,the relationship between the equivalent input noise current spectral density and the noise figure is analyzed. The derived relationship has universal validity for determining the equivalent input noise current spectral density for optical receiver designs, as verified by measuring a 155Mb/s high-impedance optical receiver front.end. Good agreement between calculated and simulated results has been achieved. 展开更多
关键词 optical receiver noise figure equivalent input noise current
下载PDF
A 0.5mV High Sensitivity 200Mbps CMOS Limiting Amplifier with RSSI for Optical Receivers
6
作者 王蓉 王志功 +1 位作者 徐建 管志强 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第2期262-268,共7页
A 0. 5mV high sensitivity,200Mbps CMOS limiting amplifier (LA) with 72dB ultra wide dynamic range is described. A novel active DC offset cancellation loop is elaborately analyzed and designed to achieve this perform... A 0. 5mV high sensitivity,200Mbps CMOS limiting amplifier (LA) with 72dB ultra wide dynamic range is described. A novel active DC offset cancellation loop is elaborately analyzed and designed to achieve this performance. Using a signal path, a received signal strength indicator (RSSI), based on the piecewise-linear approximation, is realized with a ± 2dB logarithmic accuracy in a 60dB indicating range. The architecture of the LA and RSSI employed is determined by the optimal sensitivity and RSSI accuracy for a specified speed, gain, and power consumption. It consumes 60mW from a single 5V supply. The active area is 1.05mm^2 using standard 5V 0.6μm CMOS technology. 展开更多
关键词 LA RSSI optical receivers piecewise-linear approximation
下载PDF
Free-Space Optical communication using visible light 被引量:2
7
作者 HU Guo-yong CHEN Chang-ying CHEN Zhen-qiang 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第2期186-191,共6页
The possibility of visible red light laser being used as signal light source for Free-Space Optical (FSO) communication is proposed. Based on analysis of transmission in atmospheric channel concerning 650 nm laser bea... The possibility of visible red light laser being used as signal light source for Free-Space Optical (FSO) communication is proposed. Based on analysis of transmission in atmospheric channel concerning 650 nm laser beam, performance of wireless laser communication link utilizing a low power red laser diode was evaluated. The proposed system can achieve a maximum range of 300 m at data rate 100 Mb/s theoretically. An experimental short-range link at data rate 10 Mb/s covering 300 m has been implemented in our university. It is feasible to enhance the system performance such as link range and data rate by increasing transmitting power and decreasing laser beam divergence angle or through other approaches. 展开更多
关键词 Visible light communication Red light laser free-space optical communication Wireless laser communication
下载PDF
A 26-Gb/s CMOS optical receiver with a reference-less CDR in 65-nm CMOS 被引量:2
8
作者 Quan Pan Xiongshi Luo +4 位作者 Zhenghao Li Zhengzhe Jia Fuzhan Chen Xuewei Ding C.Patrick Yue 《Journal of Semiconductors》 EI CAS CSCD 2022年第7期68-77,共10页
This paper presents a 26-Gb/s CMOS optical receiver that is fabricated in 65-nm technology. It consists of a tripleinductive transimpedance amplifier(TIA), direct current(DC) offset cancellation circuits, 3-stage gm-T... This paper presents a 26-Gb/s CMOS optical receiver that is fabricated in 65-nm technology. It consists of a tripleinductive transimpedance amplifier(TIA), direct current(DC) offset cancellation circuits, 3-stage gm-TIA variable-gain amplifiers(VGA), and a reference-less clock and data recovery(CDR) circuit with built-in equalization technique. The TIA/VGA frontend measurement results demonstrate 72-dB? transimpedance gain, 20.4-GHz-3-dB bandwidth, and 12-dB DC gain tuning range. The measurements of the VGA’s resistive networks also demonstrate its efficient capability of overcoming the voltage and temperature variations. The CDR adopts a full-rate topology with 12-dB imbedded equalization tuning range. Optical measurements of this chipset achieve a 10-12 BER at 26 Gb/s for a 2;-1 PRBS input with a-7.3-dBm input sensitivity. The measurement results with a 10-dB @ 13 GHz attenuator also demonstrate the effectiveness of the gain tuning capability and the built-in equalization. The entire system consumes 140 mW from a 1/1.2-V supply. 展开更多
关键词 clock and data recovery EQUALIZER optical receiver transimpedance amplifier variable-gain amplifier
下载PDF
The 8×10 GHz Receiver Optical Subassembly Based on Silica Hybrid Integration Technology for Data Center Interconnection 被引量:3
9
作者 Chao-Yi Li Jun-Ming An +8 位作者 Jiu-Qi Wang Liang-Liang Wang Jia-Shun Zhang Jian-Guang Li Yuan-Da Wu Yue Wang Xiao-Jie Yin Yong Li Fei Zhong 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第10期39-43,共5页
An 8×10 GHz receiver optical sub-assembly (ROSA) consisting of an 8-channel arrayed waveguide grating (AWG) and an 8-channel PIN photodetector (PD) array is designed and fabricated based on silica hybrid in... An 8×10 GHz receiver optical sub-assembly (ROSA) consisting of an 8-channel arrayed waveguide grating (AWG) and an 8-channel PIN photodetector (PD) array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection. 展开更多
关键词 AWG GHz receiver optical Subassembly Based on Silica Hybrid Integration Technology for Data Center Interconnection The 8 PD
原文传递
Design of Si-bipolar Monolithic Main Amplifier IC for Optical Fiber Receivers 被引量:1
10
作者 ZHANGYaqi ZHAOHongmin 《Semiconductor Photonics and Technology》 CAS 1999年第1期51-57,共7页
A broadband amplifier with transadmittance and transimpedance stages is designed and two types of improved AGC amplifiers are developed on the base of theory study. Making use of the basic amplifier cells, a main ampl... A broadband amplifier with transadmittance and transimpedance stages is designed and two types of improved AGC amplifiers are developed on the base of theory study. Making use of the basic amplifier cells, a main amplifier IC for optical-fiber receivers is deliberated. By computer simulating the performances of the designed main amplifier meet the necessity of high gain and wide dynamic range . They are maximum voltage gain of 42 dB, the bandwidth of 730 MHz,the input signal( V p-p )range from 5 mV to 1 V,the output amplitude about 1 V, the dynamic range of 46 dB. The designed circuit containing no inductance and large capacitance will be convenient for realizing integration. A monolithic integrated design of 622 Mb/s main amplifier is completed. 展开更多
关键词 Digital optical Fiber receiver Main Amplifier Monolithic Integrated Circuit
下载PDF
Generalized Block Markov Superposition Transmission over Free-Space Optical Links
11
作者 Jinshun Zhu Shancheng Zhao Xiao Ma 《China Communications》 SCIE CSCD 2017年第9期80-93,共14页
In free-space optical(FSO) communications, the performance of the communication systems is severely degraded by atmospheric turbulence. Channel coding and diversity techniques are commonly used to combat channel fadin... In free-space optical(FSO) communications, the performance of the communication systems is severely degraded by atmospheric turbulence. Channel coding and diversity techniques are commonly used to combat channel fading induced by atmospheric turbulence. In this paper, we present the generalized block Markov superposition transmission(GBMST) of repetition codes to improve time diversity. In the GBMST scheme, information sub-blocks are transmitted in the block Markov superposition manner, with possibly different transmission memories. Based on analyzing an equivalent system, a lower bound on the bit-error-rate(BER) of the proposed scheme is presented. Simulation results demonstrate that, under a wide range of turbulence conditions, the proposed scheme improves diversity gain with only a slight reduction of transmission rate. In particular, with encoding memory sequence(0, 0, 8) and transmission rate 1/3, a diversity order of eleven is achieved under moderate turbulence conditions. Numerical results also show that, the GBMST systems with appropriate settings can approach the derived lower bound, implying that full diversity is achievable. 展开更多
关键词 atmospheric turbulence channel block Markov superposition transmission(BMST) free-space optical communications gamma-gamma channel model sliding-window decoding algorithm time diversity
下载PDF
A Novel Outage Capacity Objective Function for Optimal Performance Monitoring and Predictive Fault Detection in Hybrid Free-Space Optical and RF Wireless Networks
12
作者 Barnet M. Schmidt 《Communications and Network》 2013年第4期305-315,共11页
This study develops an optimal performance monitoring metric for a hybrid free space optical and radio wireless network, the Outage Capacity Objective Function. The objective function—the dependence of hybrid channel... This study develops an optimal performance monitoring metric for a hybrid free space optical and radio wireless network, the Outage Capacity Objective Function. The objective function—the dependence of hybrid channel outage capacity upon the error rate, jointly quantifies the effects of atmospheric optical impairments on the performance of the free space optical segment as well as the effect of RF channel impairments on the radio frequency segment. The objective function is developed from the basic information-theoretic capacity of the optical and radio channels using the gamma-gamma model for optical fading and Ricean statistics for the radio channel fading. A simulation is performed by using the hybrid network. The objective function is shown to provide significantly improved sensitivity to degrading performance trends and supports of proactive link failure prediction and mitigation when compared to current thresholding techniques for signal quality metrics. 展开更多
关键词 free-space optical NETWORKS OUTAGE Capacity HYBRID NETWORKS Performance Monitoring Fault MANAGEMENT MIMO Wireless NETWORKS Network MANAGEMENT
下载PDF
Switched-mode AGC circuits with internally created reset module for burst-mode unbalanced data optical receiver
13
作者 Wang Rong Wang Zhigong +2 位作者 Wang Weibai Xu Jian Guan Zhiqiang 《High Technology Letters》 EI CAS 2011年第3期317-324,共8页
This paper presents an innovative switched-mode auto gain control (AGC) circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced (BMU) optical data transmission. Conventional AGC circuit is... This paper presents an innovative switched-mode auto gain control (AGC) circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced (BMU) optical data transmission. Conventional AGC circuit is inappropriate for BMU data transmission because it is based on average level detection and requires considerable time to settle on a predefined gain. Therefore, we adopt a fast switched-mode AGC based on peak level detection. After the gain is adjusted, the peak level detectors need to re-detect the peak level of the input signal. Thus, we develop an internally created reset module. This AGC with reset module exhibits a fast operation and achieves an adjusted stable gain within one-bit, avoiding any bit loss up to 10Mb/s data rate. During power-up, the peak level detectors possibly hold an uncertain level resulting in the bit-errors. We propose a power-up reset circuit to solve this problem. Designed in a 0.5μm CMOS technology, the circuit achieves an optical sensitivity of better than -30dBm and a wide dynamic range of over 30dB with a power dissipation of only 30 mW from a 5V supply. 展开更多
关键词 burst-mode unbalanced (BMU) data optical receiver auto gain control (AGC) internally created reset module bit loss
下载PDF
DP-DQPSK Optical Access System Integrated with Fiber and Free-Space Downlink for High Spectral Efficiency Application
14
作者 Yufeng Shao Fuping Chen +4 位作者 Luo Chen Shilu Shen Anrong Wang Yingxiang Luo Zefu Tan 《Optics and Photonics Journal》 2016年第8期108-113,共7页
In this letter, we present the generation, the balanced detection, and the transmission performance evaluation of dual polarization differential quadrature phase shift keying (DP-DQPSK) signals in optical access syste... In this letter, we present the generation, the balanced detection, and the transmission performance evaluation of dual polarization differential quadrature phase shift keying (DP-DQPSK) signals in optical access system integrated with fiber and free-space downlink. Polarization-multip- lexed (POLMUX) technique is introduced in the system for high spectral efficiency access utilization. 10 Gb/s DP-DQPSK downlink signals are successfully transmitted over 50 km SMF-28 and a 800 m wireless optical channel under the bad weather condition, such as fog and haze. The results show that the potentiality of DP-DQPSK optical access system is integrated with fiber and free- space downlink for providing flexible user access with high bandwidth efficiency. 展开更多
关键词 free-space optical Communication optical Access System Phase Modulation Spectral Efficiency
下载PDF
Optimizing Optical Attocells Positioning of Indoor Visible Light Communication System 被引量:1
15
作者 Mohammed S.M.Gismalla Asrul I.Azmi +5 位作者 Mohd R.Salim Farabi Iqbal Mohammad F.L.Abdullah Mosab Hamdan Muzaffar Hamzah Abu Sahmah M.Supa’at 《Computers, Materials & Continua》 SCIE EI 2023年第2期3607-3625,共19页
Visible light communication(VLC),which is a prominent emerging solution that complements the radio frequency(RF)technology,exhibits the potential to meet the demands of fifth-generation(5G)and beyond technologies.The ... Visible light communication(VLC),which is a prominent emerging solution that complements the radio frequency(RF)technology,exhibits the potential to meet the demands of fifth-generation(5G)and beyond technologies.The random movement of mobile terminals in the indoor environment is a challenge in the VLC system.The model of optical attocells has a critical role in the uniform distribution and the quality of communication links in terms of received power and signal-to-noise ratio(SNR).As such,the optical attocells positions were optimized in this study with a developed try and error(TE)algorithm.The optimized optical attocells were examined and compared with previous models.This novel approach had successfully increased minimum received power from−1.29 to−0.225 dBm,along with enhanced SNR performance by 2.06 dB.The bit error rate(BER)was reduced to 4.42×10−8 and 6.63×10−14 by utilizing OOK-NRZ and BPSK modulation techniques,respectively.The optimized attocells positions displayed better uniform distribution,as both received power and SNR performances improved by 0.45 and 0.026,respectively.As the results of the proposed model are optimal,it is suitable for standard office and room model applications. 展开更多
关键词 Visible light communication(VLC) optical attocell received power signal-to-noise ratio(SNR) bit error rate(BER) coefficient of variation(CV)
下载PDF
Optical Neural Networks:Analysis and Prospects for 5G Applications
16
作者 Doaa Sami Khafaga Zongming Lv +2 位作者 Imran Khan Shebnam M.Sefat Amel Ali Alhussan 《Computers, Materials & Continua》 SCIE EI 2023年第12期3723-3740,共18页
With the capacities of self-learning,acquainted capacities,high-speed looking for ideal arrangements,solid nonlin-ear fitting,and mapping self-assertively complex nonlinear relations,neural systems have made incredibl... With the capacities of self-learning,acquainted capacities,high-speed looking for ideal arrangements,solid nonlin-ear fitting,and mapping self-assertively complex nonlinear relations,neural systems have made incredible advances and accomplished broad application over the final half-century.As one of the foremost conspicuous methods for fake insights,neural systems are growing toward high computational speed and moo control utilization.Due to the inborn impediments of electronic gadgets,it may be troublesome for electronic-implemented neural systems to make the strides these two exhibitions encourage.Optical neural systems can combine optoelectronic procedures and neural organization models to provide ways to break the bottleneck.This paper outlines optical neural networks of feedforward repetitive and spiking models to give a clearer picture of history,wildernesses,and future optical neural systems.The framework demonstrates neural systems in optic communication with the serial and parallel setup.The graphene-based laser structure for fiber optic communication is discussed.The comparison of different balance plans for photonic neural systems is made within the setting of hereditary calculation and molecule swarm optimization.In expansion,the execution comparison of routine photonic neural,time-domain with and without extending commotion is additionally expounded.The challenges and future patterns of optical neural systems on the growing scale and applications of in situ preparing nonlinear computing will hence be uncovered. 展开更多
关键词 OPTOELECTRONICS 5G networks free-space optical TRANSDUCER neural networks
下载PDF
2.5 Gb/s Optical Transponder技术与设计 被引量:2
17
作者 朱宏娜 樊龙飞 +1 位作者 张金利 胡永明 《光电子技术与信息》 2004年第1期31-33,共3页
网络容量增长的同时也促进了光纤通信技术的发展,使得宽带传输和接入方式处于越来越重要的地位,如何有效地解决光纤干线上和大部分基于电缆局域网的信号转换成为亟待解决的问题,光收发器(opticaltransponder)很好地解决了宽带传输和接... 网络容量增长的同时也促进了光纤通信技术的发展,使得宽带传输和接入方式处于越来越重要的地位,如何有效地解决光纤干线上和大部分基于电缆局域网的信号转换成为亟待解决的问题,光收发器(opticaltransponder)很好地解决了宽带传输和接入的这一“瓶颈”问题。2.5 Gb/s是目前最流行的传输速率,其相应transponder用于SDH/Sonet OC-48/STM-16的光/电接口。文章介绍了2.5 Gb/s optical transponder的功能、结构等技术和相应的设计方案。 展开更多
关键词 光收发器 2.5 Gb/s光收发一体模块 IP over SDH
下载PDF
Interaction of two edge dislocations in free-space propagation 被引量:3
18
作者 何德 高曾辉 +1 位作者 闫红卫 吕百达 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第1期352-357,共6页
This paper studies in detail the interaction of two edge dislocations nested in a Gaussian beam propagating in free space. It shows that in free-space propagation the edge dislocations are unstable and vanish, and two... This paper studies in detail the interaction of two edge dislocations nested in a Gaussian beam propagating in free space. It shows that in free-space propagation the edge dislocations are unstable and vanish, and two noncanonical vortices with opposite topological charge take place when off-axis distances cl and c2 of two edge dislocations are nonzero, and the condition k2w08+ 32c1c2(w02- 2C1C2)Z2 〉 0 is fulfilled (k-wave number, w0-waist width). A noncanonical vortex appears when one off-axis distance is zero. However, one edge dislocation is stable when two edge dislocations are perpendicular and one off-axis distance is zero. Two perpendicular edge dislocations both with zero off-axis distance are also stable. The analytical results are illustrated by numerical examples. 展开更多
关键词 edge dislocation interaction optical vortex free-space propagation
原文传递
A 58-dBΩ20-Gb/s inverter-based cascode transimpedance amplifier for optical communications 被引量:3
19
作者 Quan Pan Xiongshi Luo 《Journal of Semiconductors》 EI CAS CSCD 2022年第1期53-58,共6页
This work presents a high-gain broadband inverter-based cascode transimpedance amplifier fabricated in a 65-nm CMOS process.Multiple bandwidth enhancement techniques,including input bonding wire,input series on-chip i... This work presents a high-gain broadband inverter-based cascode transimpedance amplifier fabricated in a 65-nm CMOS process.Multiple bandwidth enhancement techniques,including input bonding wire,input series on-chip inductive peak-ing and negative capacitance compensation,are adopted to overcome the large off-chip photodiode capacitive loading and the miller capacitance of the input device,achieving an overall bandwidth enhancement ratio of 8.5.The electrical measure-ment shows TIA achieves 58 dBΩup to 12.7 GHz with a 180-fF off-chip photodetector.The optical measurement demonstrates a clear open eye of 20 Gb/s.The TIA dissipates 4 mW from a 1.2-V supply voltage. 展开更多
关键词 bandwidth enhancement CMOS optical receiver CASCODE inductive peaking negative capacitance transimpedance amplifier(TIA)
下载PDF
Multi-Hop Free Space Optical Communications Using Serial Decode-and-Forward Relay Transmissions 被引量:1
20
作者 王俊波 焦媛 +2 位作者 陈明 王金元 曹哲 《China Communications》 SCIE CSCD 2011年第5期102-110,共9页
This paper investigates the performance of multi-hop Free Space Optical(FSO) communications using serial Decode-and-Forward(DF) relay transmissions.A statistical model for the optical intensity fluctuation at the rece... This paper investigates the performance of multi-hop Free Space Optical(FSO) communications using serial Decode-and-Forward(DF) relay transmissions.A statistical model for the optical intensity fluctuation at the receiver due to the combined effects of atmospheric turbulence-induced fading,mis alignment fading and pass-loss is presented.Under given weather and mis alignment conditions,a closed-form analytical expression for the end-to-end outage probability of serial Decode-and-Forward(DF) multi-hop FSO communications is derived.Numerical results show that the serial DF multi-hop transmission is a promising technology to enhance the performance of FSO communications.Moreover,the derived analytical expression can provide close approximations to the simulation results. 展开更多
关键词 free-space optical systems pointing errors atmospheric turbulence outage probability multi-hop transmission
下载PDF
上一页 1 2 35 下一页 到第
使用帮助 返回顶部