Compact linear polarization spectrometer based on radiation mode shaped in-fiber diffraction grating

Abstract

We propose a compact linear polarization spectrometer based on the in-fiber polarization-dependent diffraction grating. The beam profile of radiated light of the grating is shaped to be a Gaussian profile to improve the performance of the spectrometer, where the size of the focused light spot is reduced from 44 um to 33 um with the shaped radiation mode of the grating. Based on the experimental results, the proposed spectrometer can achieve 0.05 nm resolution and 115 nm wavelength responding range from 1495 nm to 1610 nm. To verify the performance of the proposed fiber spectrometer, we measure the transmission spectra of an excessively tilted fiber grating, which has a pair of orthogonal polarization transmission spectra. Compared with the traditional measuring method, the proposed fiber spectrometer integrates the polarizing and spectral analyzing functions in the measuring system and achieves the polarization-sensitive spectral analysis, which shows good wavelength consistency and perfect polarization characteristics.

Publication DOI: https://doi.org/10.1364/OL.44.005129
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
Additional Information: This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [article URL]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. Funding: National Key Research and Development Program of China (2018YFB2100902); Major Projects of Technical Innovation of Hubei (2019AAA053 and 2018AAA040); National Natural Science Foundation of China (NSFC) (61505244); Science Fund for Creative Research Groups of the Nature Science Foundation of Hubei (2018CFA004).
Publication ISSN: 1539-4794
Full Text Link:
Related URLs: https://www.osa ... i=ol-44-21-5129 (Publisher URL)
PURE Output Type: Article
Published Date: 2019-11-01
Published Online Date: 2019-09-30
Accepted Date: 2019-09-30
Authors: Qin, Huabao
He, Qinyun
Moreno, Yarien
Xing, Zhikun
Guo, Xi
Yan, Zhijun
Sun, Qizhen
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Liu, Deming
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)

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