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journal article·2019-01-01Open access

Multimode fiber spectrometer with scalable bandwidth using space-division multiplexing

Ziyi Meng, Jianqiang Li, Chunjing Yin, Tian Zhang, Zhenming Yu, Ming Tang, Weijun Tong, Kun Xu

AIP Advances· Volume 9· Issue 1
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Source abstract

Abstract

Multimode fiber (MMF) spectrometers suffer from the resolution-bandwidth trade-off due to the limited spatial speckle information used for spectral recovery. We demonstrate a design of an MMF spectrometer with scalable bandwidth using space-division multiplexing. A multicore fiber (MCF) is used to integrate with the MMF. The spatial degrees of freedom at the input are exploited to provide the independent speckle pattern, thus multiplying the spatial information and scaling the bandwidth. We have experimentally achieved 30 nm bandwidth with 0.02nm resolution at wavelength 1550 nm, only using 3 cores of a 7-core fiber and a single MMF. An efficient algorithm is developed to reconstruct the broadband sparse and dense spectrums accurately. The approach can enhance the operating bandwidth of MMF spectrometers without sacrificing the resolution, and simultaneously ensure the system complexity and stability.
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Research context

OpenAlex topics: Optical Coherence Tomography Applications · Advanced Fiber Optic Sensors · Optical Network Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications 1 , Beijing 100876, China

Next Generation Internet Access National Engineering Lab (NGIA), School of Optical and Electronic Information, Huazhong University of Sci&Tech (HUST) 2 , 1037 Luoyu Road, Wuhan 430074, China

Yangtze Optical Fibre and Cable Joint Stock Limited Company, State Key Laboratory of Optical Fiber and Cable Manufacture Technology 3 , Wuhan 430073, China

Funding

Fund of State Key Laboratory of Information Photonics and Optical Communications, BUPT · State Key Laboratory of Advanced Optical Communications and Networks, Shanghai Jiao Tong University · National Natural Science Foundation of China

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