Abstract

This Letter proposes a method that balances miniaturization and high performance of fiber optic speckle spectrometers. The periodically tapered coreless fiber is used as the scattering element to excite more higher-order modes in the coreless fiber. As a result, a remarkable spectral resolution of 0.03 nm in the near-infrared spectrum can be achieved with a 5-cm-long fiber. Narrow linewidth and broadband spectra in the wavelength of 1540–1560 nm are reconstructed separately, demonstrating the excellent performance of the designed all-fiber spectrometer. The spectral resolution of our proposed spectrometer is comparable to that of a 2-m multimode fiber spectrometer and has a significant improvement in miniaturization.

© 2023 Optica Publishing Group

High resolution compact spectrometer system based on scattering and spectral reconstruction

Xin Wang, Qi Sun, Yushi Chu, Gilberto Brambilla, Pengfei Wang, and Martynas Beresna
Opt. Lett. 48(6) 1466-1469 (2023)

Compact fiber-integrated scattering device based on mixed-phase TiO₂ for speckle spectrometer

Runze Zhu, Yu Lei, Shengjie Wan, Yifeng Xiong, Yushu Wang, Ye Chen, and Fei Xu
Opt. Lett. 47(7) 1606-1609 (2022)

Broadband multimode fiber spectrometer

Seng Fatt Liew, Brandon Redding, Michael A. Choma, Hemant D. Tagare, and Hui Cao
Opt. Lett. 41(9) 2029-2032 (2016)

Ultra-compact on-chip spectrometer based on thermally tuned topological miniaturized bound states in the continuum cavity

Xinyi Zhou, Xiaoyu Zhang, Yi Zuo, Zihao Chen, Zhiyuan Qian, Zixuan Zhang, Chao Peng, and Hongbin Li
Opt. Lett. 48(19) 4993-4996 (2023)

Laser emission from tapered fiber-based liquid-crystal microsphere for sensing

Dong Zhou, Na Zhao, Yuzhou Chen, Jing Sun, Yuxiang Li, Zenghui Peng, and Yongjun Liu
Opt. Lett. 48(14) 3773-3776 (2023)