Lasers, Fiber Optics, and Communications

Wideband slow-light propagation with no distortion in a nanofiber-plane-grating composite waveguide

[+] Author Affiliations
Chengju Ma, Wenge Guo, Haiwei Fu, Yinggang Liu, Xiaozhen Zhang

Xi’an Shiyou University, School of Science, No. 18, DianZiEr Road, Yan-Ta Zone, Xi’an 710065, China

Liyong Ren

Xi’an Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, No. 17, XinXi Road, New Industrial Park, High-tech Zone, Xi’an 710119, China

Yiping Xu

Yangtze University, School of Physics and Optoelectronic Engineering, No. 1, Nanhuan Road, Jingzhou, Hubei 434023, China

Opt. Eng. 55(6), 066120 (Jun 28, 2016). doi:10.1117/1.OE.55.6.066120
History: Received March 31, 2016; Accepted June 8, 2016
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Abstract.  A nanofiber-plane-grating composite slow-light waveguide to achieve wideband slowlight propagation with no distortion is proposed. The waveguide is formed by embedding a tapered nanofiber into a V-groove on a plane-grating surface. By optimizing the waveguide structural parameters, a slow-light effect with bandwidth of about 1453 GHz is obtained. Based on finite-difference time-domain (FDTD) method, we analyze the waveguide’s optical properties and slow-light characteristics. Simulation results show that a picosecond optical pulse propagating in the slow-light waveguide can be delayed for about 980 fs and without distortion. The group velocity of the optical pulse can be reduced to about 0.3c (c is the speed of light in vacuum). This study will provide important theoretical basis and innovative ideas for the development of new-type slow-light elements.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Chengju Ma ; Liyong Ren ; Wenge Guo ; Haiwei Fu ; Yiping Xu, et al.
"Wideband slow-light propagation with no distortion in a nanofiber-plane-grating composite waveguide", Opt. Eng. 55(6), 066120 (Jun 28, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.066120


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