Spectrum detection based on compressive sensing inside multimode fibers

被引:0
作者
Meng Fan [1 ]
Zhang Yun-Zuo [1 ]
Feng Wei-Wei [1 ]
Wu Peng-Fei [1 ]
Zou Ge-Yin [2 ]
机构
[1] Shijiazhuang Tiedao Univ, Sch Informat Sci & Technol, Shijiazhuang 050043, Hebei, Peoples R China
[2] Shijiazhuang Post & Telecommun Tech Coll, Training Dept, Shijiazhuang 050021, Hebei, Peoples R China
基金
中国国家自然科学基金;
关键词
multimode fiber; spectrometer; compressive sensing; OPTICS;
D O I
10.7498/aps.69.20200014
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
With the rapid development of integrated photonics, expensive and bulky commercial spectrometers force people to make more efforts to investigate high-performance, integrated and low-cost spectrometers. Spectrometers benefiting from the complementary metal-oxide semiconductor (CMOS) technology have greatly enriched the applications of spectrum detection while devices based on optical fibers still have potential development room. Owing to the strong dependence of multimode interference on wavelength generated in a multimode fiber, probe signals of arbitrary spectra could be detected by a detector array integrated on the top and reconstructed by using a compressive sensing (CS) algorithm. The CS algorithm has been widely used in signal processing, which saves more computing storage and time but maintains the same precision. With the interference pattern system, our spectrometer based on a fiber taper achieves a spectral resolution of 20 pm (one order of magnitude better than commercial spectrometers) and a detection bandwidth of more than 200 nm on a device length of 1 mm. After optimizing the energy function, the spectral reconstruction results show excellent detection capability and metamerism effect superior to RGB cameras or human eyes, providing a significant role for portable multi-functional on-chip systems in future.
引用
收藏
页数:6
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