Coherent optical frequency combs: From principles to applications

Zhang, Hao; Chang, Bing; Li, Zhaoyu; Liang, Yupei; Qin, Chenye; Wang, Chun; Xia, Handing; Tan, Teng; Yao, Baicheng

doi:10.1016/j.jnlest.2022.100157

Cited by 18 publications

(4 citation statements)

References 123 publications

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“…The MRR had a quality of ~1.5 × 10 6 . A continuous-wave (CW) light was amplified to ~32.1 dBm by an er In principle, the microcomb-based MWP signal processor in Figure 1 can work with different types of optical microcombs, such as single soliton [48][49][50], dark soliton [51,52], and soliton crystal [53,54]. Before spectral shaping is used to achieve the desired tap coefficients, the initial comb with non-uniform power distributions in the comb lines can be amplified and pre-shaped to obtain a uniform power distribution.…”

Section: Resultsmentioning

confidence: 99%

Processing Accuracy of Microcomb-Based Microwave Photonic Signal Processors for Different Input Signal Waveforms

Li,

Sun,

et al. 2023

Photonics

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Microwave photonic (MWP) signal processors, which process microwave signals based on photonic technologies, bring advantages intrinsic to photonics such as low loss, large processing bandwidth, and strong immunity to electromagnetic interference. Optical microcombs can offer a large number of wavelength channels and compact device footprints, which make them powerful multi-wavelength sources for MWP signal processors to realize a variety of processing functions. In this paper, we experimentally demonstrate the capability of microcomb-based MWP signal processors to handle diverse input signal waveforms. In addition, we quantify the processing accuracy for different input signal waveforms, including Gaussian, triangle, parabolic, super Gaussian, and nearly square waveforms. Finally, we analyse the factors contributing to the difference in the processing accuracy among the different input waveforms, and our theoretical analysis well elucidates the experimental results. These results provide guidance for microcomb-based MWP signal processors when processing microwave signals of various waveforms.

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Section: Resultsmentioning

confidence: 99%

Processing Accuracy of Microcomb-Based Microwave Photonic Signal Processors for Different Input Signal Waveforms

Li,

Sun,

et al. 2023

Photonics

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“…Over recent decades, the advent of the optical frequency comb has delivered unrivaled rulers for ultra-precise time-frequency measurements 6 . Specifically, Frequency combs intrinsically generate highly coherent pulse sequences, yielding revolutionary light sources for absolute distance and displacement detection 7 – 9 . Recently, the development of comb stabilization technology 10 , 11 , further enables ultrahigh accuracy for LIDARs 12 – 15 .…”

Section: Introductionmentioning

confidence: 99%

Dispersive Fourier transform based dual-comb ranging

Chang,

Tan,

et al. 2024

Nat Commun

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Laser-based light detection and ranging (LIDAR) offers a powerful tool to real-timely map spatial information with exceptional accuracy and owns various applications ranging from industrial manufacturing, and remote sensing, to airborne and in-vehicle missions. Over the past two decades, the rapid advancements of optical frequency combs have ushered in a new era for LIDAR, promoting measurement precision to quantum noise limited level. For comb LIDAR systems, to further improve the comprehensive performances and reconcile inherent conflicts between speed, accuracy, and ambiguity range, innovative demodulation strategies become crucial. Here we report a dispersive Fourier transform (DFT) based LIDAR method utilizing phase-locked Vernier dual soliton laser combs. We demonstrate that after in-line pulse stretching, the delay of the flying pulses can be identified via the DFT-based spectral interferometry instead of temporal interferometry or pulse reconstruction. This enables absolute distance measurements with precision starting from 262 nm in single shot, to 2.8 nm after averaging 1.5 ms, in a non-ambiguity range over 1.7 km. Furthermore, our DFT-based LIDAR method distinctly demonstrates an ability to completely eliminate dead zones. Such an integration of frequency-resolved ultrafast analysis and dual-comb ranging technology may pave a way for the design of future LIDAR systems.

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“…Over recent decades, the advent of the optical frequency comb has delivered unrivalled rulers for ultra-precise timefrequency measurements [ 6 ]. Speci cally, Frequency combs intrinsically generate highly coherent pulse sequences, yielding revolutionary light sources for absolute distance and displacement detection [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Dispersive Fourier transform based dual-comb ranging

Yao,

Chang,

Tan

et al. 2023

Preprint

Self Cite

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Laser-based light detection and ranging (LIDAR) offering a powerful tool to real-timely map spatial information with exceptional accuracy, owns various applications ranging from industrial manufacturing, remote sensing, to airborne and in-vehicle missions. Over the past two decades, the rapid advancements of optical frequency combs have ushered in a new era for LIDAR, promoting measurement precision to quantum noise limited level. For comb LIDAR systems, to further improve the comprehensive performances and reconcile inherent conflicts between speed, accuracy, and ambiguity range, innovative demodulation strategies become crucial. Here we report a dispersive Fourier transform (DFT) based LIDAR method utilizing phase-locked Vernier dual soliton laser combs. We demonstrate that after in-line pulse stretching, the delay of the flying pulses can be identified via the DFT-based spectrally interferometric measurement instead of pulse-fitting in time domain. This enables absolute distance measurements with precision starting from 262 nm in single shot, to 2.8 nm after averaging 1041 times, in a non-ambiguity range over 1.7 km. Furthermore, our DFT-based LIDAR method distinctly demonstrates an ability to completely eliminate dead zones. Such an integration of frequency-resolved ultrafast analysis and dual comb ranging technology may pave a way for the design of future LIDAR systems.

show abstract

Coherent optical frequency combs: From principles to applications

Cited by 18 publications

References 123 publications

Processing Accuracy of Microcomb-Based Microwave Photonic Signal Processors for Different Input Signal Waveforms

Processing Accuracy of Microcomb-Based Microwave Photonic Signal Processors for Different Input Signal Waveforms

Dispersive Fourier transform based dual-comb ranging

Dispersive Fourier transform based dual-comb ranging

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