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Optical frequency comb technology: from ground to space
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作者 Xiaodong Shao Yu Yan +1 位作者 Hainian Han Zhiyi Wei 《Astronomical Techniques and Instruments》 CSCD 2024年第2期105-116,共12页
Optical frequency combs,as powerful tools for precision spectroscopy and research into optical frequency standards,have driven continuous progress and significant breakthroughs in applications such as time-frequency t... Optical frequency combs,as powerful tools for precision spectroscopy and research into optical frequency standards,have driven continuous progress and significant breakthroughs in applications such as time-frequency transfer,measurement of fundamental physical constants,and high-precision ranging,achieving a series of milestone results in ground-based environments.With the continuous maturation and evolution of femtosecond lasers and related technologies,optical frequency combs are moving from ground-based applications to astronomical and space-based applications,playing an increasingly important role in atomic clocks,exoplanet observations,gravitational wave measurements,and other areas.This paper,focusing on astronomical and space-based applications,reviews research progress on astronomical frequency combs,optical clock time-frequency networks,gravitational waves,dark matter measurement,dual-comb large-scale absolute ranging,and high-resolution atmospheric spectroscopy.With enhanced performance and their gradual application in the field of space-based research,optical frequency combs will undoubtedly provide more powerful support for astronomical science and cosmic exploration in the future. 展开更多
关键词 Optical frequency comb Astronomical comb Optical clock-based time and frequency network Gravitational waves and dark matter Dual-comb ranging
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Phase-coherence dynamics of frequency-comb emission via high-order harmonic generation in few-cycle pulse trains
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作者 梁畅通 张晶晶 李鹏程 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期205-211,共7页
Frequency-comb emission via high-order harmonic generation(HHG)provides an alternative method for the coherent vacuum ultraviolet(VUV)and extreme ultraviolet(XUV)radiation at ultrahigh repetition rates.In particular,t... Frequency-comb emission via high-order harmonic generation(HHG)provides an alternative method for the coherent vacuum ultraviolet(VUV)and extreme ultraviolet(XUV)radiation at ultrahigh repetition rates.In particular,the temporal and spectral features of the HHG were shown to carry profound insight into frequency-comb emission dynamics.Here we present an ab initio investigation of the temporal and spectral coherence of the frequency comb emitted in HHG of He atom driven by few-cycle pulse trains.We find that the emission of frequency combs features a destructive and constructive coherences caused by the phase interference of HHG,leading to suppression and enhancement of frequency-comb emission.The results reveal intriguing and substantially different nonlinear optical response behaviors for frequency-comb emission via HHG.The dynamical origin of frequency-comb emission is clarified by analyzing the phase coherence in HHG processes in detail.Our results provide fresh insight into the experimental realization of selective enhancement of frequency comb in the VUV–XUV regimes. 展开更多
关键词 high-order harmonic generation frequency comb time-dependent Schro¨dinger equation intense laser field systems
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Comb-Based Filter Design Using Sharpening Technique and Certain Palindromic Polynomial
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作者 Gordana Jovanovic Dolecek 《Journal of Applied Mathematics and Physics》 2023年第11期3773-3781,共9页
This paper presents a novel approach to improve aliasing rejection in comb-based decimation filters. The method is established on certain palindromic polynomials with all zeros on the unit circle and the sharpening te... This paper presents a novel approach to improve aliasing rejection in comb-based decimation filters. The method is established on certain palindromic polynomials with all zeros on the unit circle and the sharpening technique. As a result, aliasing rejection and the passband characteristic are improved. The method is illustrated with various examples and compared with the methods from the literature. . 展开更多
关键词 comb Filter ALIASING Passband Droop Palindromic Polynomial SHARPENING
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一种改进的Fixed-base Comb安全快速算法 被引量:1
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作者 殷新春 王圆圆 侯红祥 《小型微型计算机系统》 CSCD 北大核心 2007年第6期1080-1083,共4页
本文从分析椭圆曲线上Fixed-baseComb算法出发,根据其特点,利用牺牲乘法操作以降低求逆操作的方法,分别用2kP、2P+Q的快速算法对Fixed-baseComb算法的预计算阶段和赋值阶段进行改进,极大地提高了计算效率:在素数域上预计算阶段提高70%~... 本文从分析椭圆曲线上Fixed-baseComb算法出发,根据其特点,利用牺牲乘法操作以降低求逆操作的方法,分别用2kP、2P+Q的快速算法对Fixed-baseComb算法的预计算阶段和赋值阶段进行改进,极大地提高了计算效率:在素数域上预计算阶段提高70%~80%,而赋值阶段提高38%~43%,同时,改进算法通过对k的预处理,使得算法能够抵抗边际信道攻击. 展开更多
关键词 ECC 标量乘法 底层域运算 直接计算 Fixed—base comb算法 边际信道攻击
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Sub-femtometer-resolution absolute spectroscopy with sweeping electro-optic combs 被引量:4
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作者 Bingxin Xu Xinyu Fan +1 位作者 Shuai Wang Zuyuan He 《Opto-Electronic Advances》 SCIE EI CAS 2022年第12期35-43,共9页
Optical frequency comb with evenly spaced lines over a broad bandwidth has revolutionized the fields of optical metrology and spectroscopy.Here,we propose a fast interleaved dual-comb spectroscopy with sub-femtometer-... Optical frequency comb with evenly spaced lines over a broad bandwidth has revolutionized the fields of optical metrology and spectroscopy.Here,we propose a fast interleaved dual-comb spectroscopy with sub-femtometer-resolution and absolute frequency,in which two electro-optic frequency combs are swept.Electrically-modulated stabilized laser enables ultrahigh resolution of 0.16 fm(or 20 k Hz in optical frequency)and single-shot measurement in 90 ms.Total 20 million points are recorded spanning 3.2 nm(or 400 GHz)bandwidth,corresponding to a spectral sampling rate of 2.5×10^(8)points/s under Nyquist-limitation.Besides,considering the trade-off between the measurement time and spectral resolution,a fast single-shot measurement is also realized in 1.6 ms with 8 fm(or 1 MHz)resolution.We demonstrate the 25-averaged result with 30.6 d B spectral measurement signal-to-noise ratio(SNR)by reducing the filter bandwidth in demodulation.The results show great prospect for precise measurement with flexibly fast refresh time,high spectral resolution,and high SNR. 展开更多
关键词 dual-comb spectroscopy optical frequency comb interferometry
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无移位操作的快速comb乘法算法
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作者 李忠 彭代渊 郝悦彤 《计算机科学》 CSCD 北大核心 2009年第3期158-160,共3页
有限域GF(2n)上乘法运算是影响GF(2n)上椭圆曲线密码实现效率的关键运算之一。基于窗口技术的comb乘法算法,被认为是目前有限域GF(2n)上乘法运算最快的算法之一。但是,它仍然使用了移位操作,而移位操作恰好又是域GF(2n)乘法运算中很耗... 有限域GF(2n)上乘法运算是影响GF(2n)上椭圆曲线密码实现效率的关键运算之一。基于窗口技术的comb乘法算法,被认为是目前有限域GF(2n)上乘法运算最快的算法之一。但是,它仍然使用了移位操作,而移位操作恰好又是域GF(2n)乘法运算中很耗时的操作。提出并实现了一种新的基于窗口技术的快速comb乘法算法,该算法避免了移位操作,且不增加异或运算次数。理论分析和实验结果表明,新算法有很好的实现效率,适合于有限域GF(2n)上椭圆曲线密码算法的软件实现。 展开更多
关键词 GF(2n)乘法运算 移位操作 comb乘法算法 椭圆曲线密码
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一种基于折半运算的Comb标量乘算法
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作者 殷新春 朱虹 侯红祥 《微电子学与计算机》 CSCD 北大核心 2008年第9期206-208,212,共4页
通过将折半运算应用于Comb算法,提出了一种新的Comb标量乘算法,它可以提高域F2^m上的椭圆曲线标量乘法的效率.在预计算阶段和赋值阶段,新算法分别用高效的折半运算取代倍点运算.对新算法运行时间进行分析,并与传统的Comb算法进行比较,... 通过将折半运算应用于Comb算法,提出了一种新的Comb标量乘算法,它可以提高域F2^m上的椭圆曲线标量乘法的效率.在预计算阶段和赋值阶段,新算法分别用高效的折半运算取代倍点运算.对新算法运行时间进行分析,并与传统的Comb算法进行比较,当窗口宽度w=4时,新算法效率提高58%-63%. 展开更多
关键词 椭圆曲线 标量乘 折半运算 comb算法
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抗SPA攻击的固定基comb标量乘算法
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作者 李杨 王劲林 +1 位作者 曾学文 叶晓舟 《网络新媒体技术》 2017年第6期19-26,共8页
简单能量分析攻击(SPA)是椭圆曲线密码体制中比较常见的一种攻击方式。基于Mohamed提出的优化固定基comb标量乘算法,提出一种优化的标量编码算法,使得编码后标量中所有的项均不为零;并在此基础上提出一种能够抵抗SPA攻击的固定基comb算... 简单能量分析攻击(SPA)是椭圆曲线密码体制中比较常见的一种攻击方式。基于Mohamed提出的优化固定基comb标量乘算法,提出一种优化的标量编码算法,使得编码后标量中所有的项均不为零;并在此基础上提出一种能够抵抗SPA攻击的固定基comb算法,在保证算法性能的基础上提高算法的安全性。最终OCTEON平台上实验结果表明,对比能够抗SPA攻击的Joye-Tunstall算法,本文提出的算法在需要存储预计算点数量相同的情况下,计算性能得到了大幅度的提高。 展开更多
关键词 SPA攻击 固定基comb算法 标量乘算法 椭圆曲线密码
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“战斗力”能译成“combativeness”吗?
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作者 侯松山 王全利 李成兵 《海外英语》 2016年第2期88-89,共2页
新华网英文版在一篇报道中把军事术语"战斗力"译成了"combativeness"。通过分析十四部英汉词典中"combativeness"的释义、八部汉英词典给出的"战斗力"的译法以及基于问卷调查的结果,作者指出... 新华网英文版在一篇报道中把军事术语"战斗力"译成了"combativeness"。通过分析十四部英汉词典中"combativeness"的释义、八部汉英词典给出的"战斗力"的译法以及基于问卷调查的结果,作者指出了新华网这一译法的错误,补充了汉英词典未收录的"战斗力"的两种译法,并强调加强外宣翻译中政治意识的重要性。 展开更多
关键词 战斗力 combativeness 英汉和汉英词典 问卷调查 政治意识
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梳形聚合物comb-1的溶液性能对比评价 被引量:2
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作者 付美龙 王荣海 +1 位作者 吴超 韩成 《石油天然气学报》 CAS CSCD 北大核心 2010年第3期134-137,共4页
通过试验手段对比梳形聚合物comb-1与大庆生产的HPAM和日本三菱公司生产的MO-4000的溶液性能,主要包括溶液粘度对浓度的依赖性、剪切稳定性、抗盐性及粘度对温度依赖性的研究。试验表明,在实验室自来水中和在盐水中梳形聚合物comb-1的... 通过试验手段对比梳形聚合物comb-1与大庆生产的HPAM和日本三菱公司生产的MO-4000的溶液性能,主要包括溶液粘度对浓度的依赖性、剪切稳定性、抗盐性及粘度对温度依赖性的研究。试验表明,在实验室自来水中和在盐水中梳形聚合物comb-1的剪切稳定性、抗盐性、高温粘度保持性等均优于日本MO-4000和大庆HPAM。日本MO-4000和大庆HPAM是目前油田应用的较为普遍的聚丙烯酰胺,通过对比研究,说明梳形聚合物comb-1的性能更好,有望成为聚丙烯酰胺的替代品。 展开更多
关键词 梳形聚合物 剪切稳定性 抗盐性 耐温性
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A long-term frequency-stabilized erbium-fiber-laser-based optical frequency comb with an intra-cavity electro-optic modulator 被引量:6
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作者 张颜艳 闫露露 +6 位作者 赵文宇 孟森 樊松涛 张龙 郭文阁 张首刚 姜海峰 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第6期366-370,共5页
We demonstrate an optical frequency comb based on an erbium-doped-fiber femtosecond laser with the nonlinear polarization evolution scheme. The repetition rate of the laser is about 209 MHz. By controlling an intra-ca... We demonstrate an optical frequency comb based on an erbium-doped-fiber femtosecond laser with the nonlinear polarization evolution scheme. The repetition rate of the laser is about 209 MHz. By controlling an intra-cavity electro- optic modulator and a piezo-transducer, the repetition rate can be stabilized with a high-bandwidth servo in a frequency range of 3 kHz, enabling long-term repetition rate phase-locking. The in-loop frequency stability of repetition rate is about 1.6× 10-13 in an integration time of 1 s, limited by the measurement system; and it is inversely proportional to integration time in the short term. Furthermore, using a common path f-2f interferometer, the carrier envelope offset frequency of the comb is obtained with a signal-to-noise ratio of 40 dB in a 3-MHz resolution bandwidth. Stabilized cartier envelope offset frequency exhibits a deviation of 0.6 mHz in an integration time of 1 s. 展开更多
关键词 optical frequency comb fiber laser frequency stabilization frequency instability
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梳形聚合物comb-1的结构表征 被引量:4
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作者 付美龙 刘杰 《西安石油大学学报(自然科学版)》 CAS 北大核心 2009年第2期67-70,共4页
对实验室合成梳形聚合物comb-1的化学结构、形貌特征及抗盐性能进行了研究.通过FT-IR傅立叶变换红外光谱和Inova-600型核磁共振波谱分析得出梳形聚合物comb-1的化学结构是丙烯酰胺与单体B的共聚物;通过Nanoscope IIIa型多功能原子力显... 对实验室合成梳形聚合物comb-1的化学结构、形貌特征及抗盐性能进行了研究.通过FT-IR傅立叶变换红外光谱和Inova-600型核磁共振波谱分析得出梳形聚合物comb-1的化学结构是丙烯酰胺与单体B的共聚物;通过Nanoscope IIIa型多功能原子力显微镜观察该梳形聚合物形貌,发现该聚合物确实是梳形结构;利用Quanta-200型扫描电镜对梳形聚合物comb-1进行观察,发现其抗盐性能较好,并且在模拟南阳油田水质条件下,相比日本三菱公司生产的MO-4000而言,梳形聚合物comb-1确实具有更好的抗盐能力. 展开更多
关键词 梳形聚合物 化学结构 形貌特征 抗盐能力
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A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy 被引量:3
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作者 侯磊 韩海年 +4 位作者 王薇 张龙 庞利辉 李德华 魏志义 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第2期202-206,共5页
A laser frequency comb with several tens GHz level is demonstrated,based on a Yb-doped femtosecond fiber laser and two low-finesse Fabry-Perot cavities(FPCs) in series.The original 250-MHz mode-line-spacing of the s... A laser frequency comb with several tens GHz level is demonstrated,based on a Yb-doped femtosecond fiber laser and two low-finesse Fabry-Perot cavities(FPCs) in series.The original 250-MHz mode-line-spacing of the source comb is filtered to 4.75 GHz and 23.75 GHz,respectively.According to the multi-beam interferences theory of FPC,the side-mode suppression rate of FPC schemes is in good agreement with our own theoretical results from 27 dB of a single FPC to43 dB of paired FPCs.To maintain long-term stable operation and determine the absolute frequency mode number in the23.75-GHz comb,the Pound-Drever-Hall(PDH) locking technology is utilized.Such stable tens GHz frequency combs have important applications in calibrating astronomical spectrographs with high resolution. 展开更多
关键词 laser frequency comb Fabry-P6rot cavity high repetition rate high resolution spectroscopy
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基于奇系数Comb的椭圆曲线密码抗功耗攻击方案 被引量:5
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作者 梁芳 沈济南 《计算机应用与软件》 CSCD 2016年第3期288-290,293,共4页
针对资源受限的密码芯片在抵抗功耗攻击中存在效率和安全两个方面的矛盾。通过将标量采用奇系数梳状算法进行编码,然后结合预计算表将椭圆曲线标量乘法运算转化为一组小标量乘法运算,并利用基点掩码技术实施抗功耗攻击,提出一种基于奇系... 针对资源受限的密码芯片在抵抗功耗攻击中存在效率和安全两个方面的矛盾。通过将标量采用奇系数梳状算法进行编码,然后结合预计算表将椭圆曲线标量乘法运算转化为一组小标量乘法运算,并利用基点掩码技术实施抗功耗攻击,提出一种基于奇系数Comb的椭圆曲线密码抗功耗攻击方案。算法性能分析结果表明:与传统的抗功耗攻击方案相比,给出的抗功耗攻击方案不仅可以抵抗简单功耗攻击、差分功耗攻击、零值寄存器功耗攻击和零值点功耗攻击,并且能够在存储空间和主循环运算量基本保持不变的情况下具有更高效的运算效率,在各种资源受限的应用系统中具有较好的实际应用价值。 展开更多
关键词 椭圆曲线密码 功耗攻击 奇系数梳状算法 预计算表 基点掩码
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Tunable and broadband microwave frequency combs based on a semiconductor laser with incoherent optical feedback 被引量:3
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作者 赵茂戎 吴正茂 +2 位作者 邓涛 周桢力 夏光琼 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第5期363-368,共6页
Based on a semiconductor laser (SL) with incoherent optical feedback, a novel all-optical scheme for generating tunable and broadband microwave frequency combs (MFCs) is proposed and investigated numerically. The ... Based on a semiconductor laser (SL) with incoherent optical feedback, a novel all-optical scheme for generating tunable and broadband microwave frequency combs (MFCs) is proposed and investigated numerically. The results show that, under suitable operation parameters, the SL with incoherent optical feedback can be driven to operate at a regular pulsing state, and the generated MFCs have bandwidths broader than 40 GHz within a 10 dB amplitude variation. For a fixed bias current, the line spacing (or repetition frequency) of the MFCs can be easily tuned by varying the feedback delay time and the feedback strength, and the tuning range of the line spacing increases with the increase in the bias current. The linewidth of the MFCs is sensitive to the variation of the feedback delay time and the feedback strength, and a linewidth of tens of KHz can be achieved through finely adjusting the feedback delay time and the feedback strength. In addition, mappings of amplitude variation, repetition frequency, and linewidth of MFCs in the parameter space of the feedback delay time and the feedback strength are presented. 展开更多
关键词 semiconductor laser incoherent optical feedback microwave frequency combs
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Review of low timing jitter mode-locked fiber lasers and applications in dual-comb absolute distance measurement 被引量:9
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作者 Haosen Shi Youjian Song +6 位作者 Runmin Li Yuepeng Li Hui Cao Haochen Tian Bowen Liu Lu Chai Minglie Hu 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2018年第4期205-217,共13页
Passively mode-locked fiber lasers emit femtosecond pulse trains with excellent short-term stability. The quantum-limited timing jitter of a free running femtosecond erbium-doped fiber laser working at room temperatur... Passively mode-locked fiber lasers emit femtosecond pulse trains with excellent short-term stability. The quantum-limited timing jitter of a free running femtosecond erbium-doped fiber laser working at room temperature is considerably below one femtosecond at high Fourier frequency. The ultrashort pulse train with ultralow timing jitter enables absolute time-of-flight measurements based on a dual-comb implementation, which is typically composed of a pair of optical frequency combs generated by femtosecond lasers. Dead-zone-free absolute distance measurement with sub-micrometer precision and kHz update rate has been routinely achieved with a dual-comb configuration, which is promising for a number of precision manufacturing applications, from large step-structure measurements prevalent in microelectronic profilometry to three coordinate measurements in large-scale aerospace manufacturing and shipbuilding. In this paper, we first review the sub-femtosecond precision timing jitter characterization methods and approaches for ultralow timing jitter mode-locked fiber laser design. Then, we provide an overview of the state-of-the-art dual-comb absolute ranging technology in terms of working principles, experimental implementations, and measurement precisions. Finally, we discuss the impact of quantum-limited timing jitter on the dual-comb ranging precision at a high update rate. The route to highprecision dual-comb range finder design based on ultralow jitter femtosecond fiber lasers is proposed. 展开更多
关键词 TIMING JITTER MODE-LOCKED lasers Dual-comb ABSOLUTE distance measurement
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Interaction Between Waves and A Comb-Type Breakwater 被引量:7
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作者 董国海 李玉成 +3 位作者 孙昭晨 孙洋 牛恩宗 毛铠 《China Ocean Engineering》 SCIE EI 2003年第4期517-526,共10页
The characteristics of wave transmission, reflection and energy dissipation of comb-type caisson breakwaters are studied through laboratory physical model tests. Regular and irregular waves, with a wide range of wave ... The characteristics of wave transmission, reflection and energy dissipation of comb-type caisson breakwaters are studied through laboratory physical model tests. Regular and irregular waves, with a wide range of wave heights and periods and a constant water depth, are considered. Different dimensions of each portion of the comb-type caisson breakwater are tested. Empirical formulae for calculating the reduction coefficient k, which is the ratio of horizontal wave force on unit length of the comb-type breakwater to that on unit length of the vertical wall breakwater, and for calculating the reflection coefficient of waves k, are obtained from the measurements. The comb-type caisson breakwater has been found to be very efficient in dissipating incident wave energy and in reducing wave reflection, and has already been used for the construction of an island breakwater in the Dayao Bay of Dalian Port, Liaoning Province, China. Compared with the cost of a common caisson breakwater, about 24.5% of the investment has been saved owing to the use of this comb-type breakwater. 展开更多
关键词 comb-type breakwater physical model wave force wave reflection
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Precise determination of characteristic laser frequencies by an Er-doped fiber optical frequency comb 被引量:3
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作者 曹士英 韩羿 +2 位作者 丁永今 林百科 方占军 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第7期327-335,共9页
Femtosecond optical frequency combs correlate the microwave and optical frequencies accurately and coherently.Therefore,any optical frequency in visible to near-infrared region can be directly traced to a microwave fr... Femtosecond optical frequency combs correlate the microwave and optical frequencies accurately and coherently.Therefore,any optical frequency in visible to near-infrared region can be directly traced to a microwave frequency.As a result,the length unit“meter”is directly related to the time unit“second”.This paper validates the capability of the national wavelength standards based on a home-made Er-doped fiber femtosecond optical frequency comb to measure the laser frequencies ranging from visible to near-infrared region.Optical frequency conversion in the femtosecond optical frequency comb is achieved by combining spectral broadening in a highly nonlinear fiber with a single-point frequencydoubling scheme.The signal-to-noise ratio of the beat notes between the femtosecond optical frequency comb and the lasers at 633,698,729,780,1064,and 1542 nm is better than 30 d B.The frequency instability of the above lasers is evaluated by using a hydrogen clock signal with a instability of better than 1×10^(-13)at 1-s averaging time.The measurement is further validated by measuring the absolute optical frequency of an iodine-stabilized 532-nm laser and an acetylenestabilized 1542-nm laser.The results are within the uncertainty range of the international recommended values.Our results demonstrate the accurate optical frequency measurement of lasers at different frequencies using the femtosecond optical frequency comb,which is not only important for the precise and accurate traceability and calibration of the laser frequencies,but also provides technical support for establishing the national wavelength standards based on the femtosecond optical frequency comb. 展开更多
关键词 optical frequency measurement phase lock Er-doped fiber laser fiber optical frequency comb
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Eigenvalue spectrum analysis for temporal signals of Kerr optical frequency combs based on nonlinear Fourier transform 被引量:1
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作者 王佳 盛爱国 +2 位作者 黄鑫 李荣玉 何广强 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第3期225-231,共7页
Based on the nonlinear Schr?dinger equation(NLSE) with damping, detuning, and driving terms describing the evolution of signals in a Kerr microresonator, we apply periodic nonlinear Fourier transform(NFT) to the study... Based on the nonlinear Schr?dinger equation(NLSE) with damping, detuning, and driving terms describing the evolution of signals in a Kerr microresonator, we apply periodic nonlinear Fourier transform(NFT) to the study of signals during the generation of the Kerr optical frequency combs(OFCs). We find that the signals in different states, including the Turing pattern, the chaos, the single soliton state, and the multi-solitons state, can be distinguished according to different distributions of the eigenvalue spectrum. Specially, the eigenvalue spectrum of the single soliton pulse is composed of a pair of conjugate symmetric discrete eigenvalues and the quasi-continuous eigenvalue spectrum with eye-like structure.Moreover, we have successfully demonstrated that the number of discrete eigenvalue pairs in the eigenvalue spectrum corresponds to the number of solitons formed in a round-trip time inside the Kerr microresonator. This work shows that some characteristics of the time-domain signal can be well reflected in the nonlinear domain. 展开更多
关键词 NONLINEAR FOURIER transform KERR optical frequency combS NONLINEAR signal processing
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Recent progress in integrated electro-optic frequency comb generation 被引量:2
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作者 Hao Sun Mostafa K.halil +1 位作者 Zifei Wang Lawrence R.Chen 《Journal of Semiconductors》 EI CAS CSCD 2021年第4期5-16,共12页
Optical frequency combs have emerged as an important tool enabling diverse applications from test-and-measurement,including spectroscopy,metrology,precision distance measurement,sensing,as well as optical and microwav... Optical frequency combs have emerged as an important tool enabling diverse applications from test-and-measurement,including spectroscopy,metrology,precision distance measurement,sensing,as well as optical and microwave waveform synthesis,signal processing,and communications.Several techniques exist to generate optical frequency combs,such as mode-locked lasers,Kerr micro-resonators,and electro-optic modulation.Important characteristics of optical frequency combs include the number of comb lines,their spacing,spectral shape and/or flatness,and intensity noise.While mode-locked lasers and Kerr micro-resonators can be used to obtain a large number of comb lines compared to electro-optic modulation,the latter provides increased flexibility in tuning the comb spacing.For some applications in optical communications and microwave photonics,a high degree of integration may be more desirable over a very large number of comb lines.In this paper,we review recent progress on integrated electro-optic frequency comb generators,including those based on indium phosphide,lithium niobate,and silicon photonics. 展开更多
关键词 electro-optic frequency comb generation integrated photonics silicon photonics integrated lithium niobate indium phosphide
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