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.
Original language | English |
---|---|
Title of host publication | Optics, Photonics and Digital Technologies for Imaging Applications IV |
Editors | Peter Schelkens, Touradj Ebrahimi, Gabriel Cristóbal, et al |
Publisher | SPIE |
Number of pages | 7 |
ISBN (Print) | 978-1-5106-0141-3 |
DOIs | |
Publication status | Published - 3 Apr 2016 |
Event | Optics, Photonics and Digital Technologies for Imaging Applications IV - Brussels, Belgium Duration: 5 Apr 2016 → 6 Apr 2016 |
Conference
Conference | Optics, Photonics and Digital Technologies for Imaging Applications IV |
---|---|
Country/Territory | Belgium |
City | Brussels |
Period | 5/04/16 → 6/04/16 |
Bibliographical note
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
Keywords
- angular dispersion
- diffraction gratings
- image detection systems
- tilted fiber Bragg gratings