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

Wang, Guoqing, Wang, Chao, Yan, Zhijun and Zhang, Lin (2016). A fiber-compatible spectrally encoded imaging system using a 45° tilted fiber grating. IN: Optics, Photonics and Digital Technologies for Imaging Applications IV. Schelkens, Peter; Ebrahimi, Touradj; Cristóbal, Gabriel and et al, (eds) SPIE.

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 μm in our experiment.

Publication DOI: https://doi.org/10.1117/12.2225140
Divisions: Engineering & Applied Sciences > Institute of Photonics
Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: Guoqing Wang; Chao Wang; Zhijun Yan and Lin Zhang; "A fiber-compatible spectrally encoded imaging system using a 45° tilted fiber grating", Proc. SPIE 9896, Optics, Photonics and Digital Technologies for Imaging Applications IV, 98960J (April 29, 2016). Copyright 2016 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2225140
Event Title: Optics, Photonics and Digital Technologies for Imaging Applications IV
Event Type: Other
Event Dates: 2016-04-05 - 2016-04-06
Uncontrolled Keywords: angular dispersion,diffraction gratings,image detection systems,tilted fiber Bragg gratings,Electronic, Optical and Magnetic Materials,Condensed Matter Physics,Computer Science Applications,Applied Mathematics,Electrical and Electronic Engineering
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Related URLs: http://www.scopus.com/inward/record.url?scp=84991458176&partnerID=8YFLogxK (Scopus URL)
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2520331 (Publisher URL)
Published Date: 2016-04-03
Authors: Wang, Guoqing
Wang, Chao
Yan, Zhijun
Zhang, Lin ( 0000-0002-1691-5577)

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