首页|A wideband,high-resolution vector spectrum analyzer for integrated photonics

A wideband,high-resolution vector spectrum analyzer for integrated photonics

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  • 国家科技期刊平台
  • NETL
  • NSTL
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The analysis of optical spectra—emission or absorption—has been arguably the most powerful approach for discovering and understanding matter.The invention and development of many kinds of spectrometers have equipped us with versatile yet ultra-sensitive diagnostic tools for trace gas detection,isotope analysis,and resolving hyperfine structures of atoms and molecules.With proliferating data and information,urgent and demanding requirements have been placed today on spectrum analysis with ever-increasing spectral bandwidth and frequency resolution.These requirements are especially stringent for broadband laser sources that carry massive information and for dispersive devices used in information processing systems.In addition,spectrum analyzers are expected to probe the device's phase response where extra information is encoded.Here we demonstrate a novel vector spectrum analyzer(VSA)that is capable of characterizing passive devices and active laser sources in one setup.Such a dual-mode VSA can measure loss,phase response,and dispersion properties of passive devices.It also can coherently map a broadband laser spectrum into the RF domain.The VSA features a bandwidth of 55.1 THz(1260-1640 nm),a frequency resolution of 471 kHz,and a dynamic range of 56 dB.Meanwhile,our fiber-based VSA is compact and robust.It requires neither high-speed modulators and photodetectors nor any active feedback control.Finally,we employ our VSA for applications including characterization of integrated dispersive waveguides,mapping frequency comb spectra,and coherent light detection and ranging(LiDAR).Our VSA presents an innovative approach for device analysis and laser spectroscopy,and can play a critical role in future photonic systems and applications for sensing,communication,imaging,and quantum information processing.

Yi-Han Luo、Baoqi Shi、Wei Sun、Ruiyang Chen、Sanli Huang、Zhongkai Wang、Jinbao Long、Chen Shen、Zhichao Ye、Hairun Guo、Junqiu Liu

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International Quantum Academy,518048 Shenzhen,China

Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,518055 Shenzhen,China

Department of Optics and Optical Engineering,University of Science and Technology of China,230026 Hefei,China

Hefei National Laboratory,University of Science and Technology of China,230088 Hefei,China

Qaleido Photonics,518048 Shenzhen,China

Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,200444 Shanghai,China

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National Natural Science Foundation of ChinaInnovation Program for Quantum Science and TechnologyShenzhen-Hong Kong Cooperation Zone for Technology and InnovationGuangdong Provincial Key LaboratoryChina Postdoctoral Science Foundation

122611315032023ZD0301500HZQB-KCZYB20200502019B1212030022022M721482

2024

10.1038/s41377-024-01435-z

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(4)
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