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A fiber-compatible spectrally encoded imaging system using a 45° tilted fiber grating

Wang, Guoqing, Wang, Chao, Yan, Zhijun, Zhang, Lin (2016) A fiber-compatible spectrally encoded imaging system using a 45° tilted fiber grating. In: SPIE Proceedings Series. Proc. SPIE 9896, Optics, Photonics and Digital Technologies for Imaging Applications IV. . Spie-Int Soc Optical Engineering ISBN 978-1-5106-0141-3. (doi:10.1117/12.2225140)

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Abstract

We propose and demonstrate, for the first time to our best knowledge, the use of a 45° tilted fiber grating (TFG) as an infiber lateral diffraction element in an efficient and fiber-compatible spectrally encoded imaging (SEI) system. Under proper polarization control, the TFG has significantly enhanced diffraction efficiency (93.5%) due to strong tilted reflection. Our conceptually new fiber-topics-based design eliminates the need for bulky and lossy free-space diffraction gratings, significantly reduces the volume and cost of the imaging system, improves energy efficiency, and increases system stability. As a proof-of-principle experiment, we use the proposed system to perform an one dimensional (1D) line scan imaging of a customer-designed three-slot sample and the results show that the constructed image matches well with the actual sample. The angular dispersion of the 45° TFG is measured to be 0.054°/nm and the lateral resolution of the SEI system is measured to be 28 ?m in our experiment.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.1117/12.2225140
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK8300 Optoelectronic devices
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Chao Wang
Date Deposited: 28 Apr 2016 21:40 UTC
Last Modified: 29 May 2019 17:16 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/55188 (The current URI for this page, for reference purposes)
Wang, Chao: https://orcid.org/0000-0002-0454-8079
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