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

Luo，Yi Han1,2; Shi，Baoqi1,3; Sun，Wei1; Chen，Ruiyang1,2; Huang，Sanli1,4; Wang，Zhongkai1; Long，Jinbao1; Shen，Chen1; Ye，Zhichao5; Guo，Hairun6; Liu，Junqiu1,4

2024-12-01

10.1038/s41377-024-01435-z

Light: Science and Applications   影响因子和分区

2095-5545

2047-7538

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.

SCI

英语

其他

2-s2.0-85189648793

Scopus

1.International Quantum Academy,Shenzhen,518048,China
2.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei,230026,China
4.Hefei National Laboratory,University of Science and Technology of China,Hefei,230088,China
5.Qaleido Photonics,Shenzhen,518048,China
6.Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai,200444,China

Luo，Yi Han,Shi，Baoqi,Sun，Wei,et al. A wideband, high-resolution vector spectrum analyzer for integrated photonics[J]. Light: Science and Applications,2024,13(1).

Luo，Yi Han.,Shi，Baoqi.,Sun，Wei.,Chen，Ruiyang.,Huang，Sanli.,...&Liu，Junqiu.(2024).A wideband, high-resolution vector spectrum analyzer for integrated photonics.Light: Science and Applications,13(1).

Luo，Yi Han,et al."A wideband, high-resolution vector spectrum analyzer for integrated photonics".Light: Science and Applications 13.1(2024).