In-fibre diffraction grating enables high-efficiency optical wireless communication and time stretch imaging

Wang, Chao (2017) In-fibre diffraction grating enables high-efficiency optical wireless communication and time stretch imaging. In: 2017 International Conference on Optical Instruments and Technology, 28 – 30 Oct 2017, Beijing, China. (In press) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

Optical diffraction elements (ODEs) are key components for innovative applications based on spectral encoding. Two most recent examples are wavelength-controlled laser beam steering for optical wireless communication and wavelength-to-space mapping for photonic time stretch imaging. Most commonly used ODEs are free-space ruled or holographic diffraction gratings, which however suffer from some inherent drawbacks, such as bulky construction, limited diffraction efficiency (up to 75%) due to the inherent zeroth-order reflection, and high coupling loss between free-space diffraction gratings and optical fibres in the system. In this paper, we report the use of a 45° tilted fiber grating (TFG) as a highly efficient, low cost and compact in-fiber diffractive device. Its superior performance in both passive infrared laser beam steering for optical wireless transmission and ultrafast photonic time-stretch imaging is presented with experimental demonstrations. Compared to conventional free-space diffractive devices, the 45° TFG provides significant advantages of high diffraction efficiency (>95%), compactness, low cost and inherent fiber-compatibility and holds great promise in spectral encoded applications.

Item Type: Conference or workshop item (Paper)
Uncontrolled keywords: diffraction gratings, dispersion, optical beam steering, optical wireless communications, photonic time stretch, tilted fiber grating, ultrafast imaging
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunications > TK5103.59 Optical communications, Fibre-optics
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 Aug 2017 19:13 UTC
Last Modified: 29 Aug 2017 11:48 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/62959 (The current URI for this page, for reference purposes)
Wang, Chao: https://orcid.org/0000-0002-0454-8079
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