Compact Broadband Wavelength Selective Switch based on In-fiber Diffraction Device


In this study, a compact and broadband wavelength selective switch (WSS) based on a radiated tiled fiber grating with 45° tilt angle (RTFG) is proposed and experimentally demonstrated. The 45 ° RTFG is employed as both radiating and receiving light, replacing the fiber arrays and bulky dispersion element in the traditional WSS system. We have theoretically and experimentally investigated the proposed WSS in terms of operating wavelength range, spectral resolution and insertion loss. In the experiment, a 1×2 compact WSS based on 45 ° RTFG and LCoS is achieved, which has a wide operation range between 1520nm and 1597nm, covering the C+L bandwidth. The measured spectral resolution and tuning accuracy are 0.4nm and 0.08nm, respectively. The insertion loss of the WSS system is about 20 dB, which is mainly caused by the aperture loss of 45 ° RTFG. Moreover, we have also investigated the spectral filtering performance of the proposed WSS, in which the filtered spectral of the channel spacing of 300GHz, 200GHz and 100GHz are realized. The proposed in-fiber 45° RTFG diffraction device based WSS has a compact structure and C+L covered bandwidth, which can be potentially used for optical fiber communication.

Publication DOI:
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Funding Information: National Natural Science Foundation of China (Grant Number: 62075071) National Key Research and Development Program of China (Grant Number: 2023YFE0105800). National Science Fund for Excellent Young Scholars (Grant Number: 61922033)
Additional Information: Copyright © 2024, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Bandwidth,Diffraction,Gratings,Lenses,Optical fiber dispersion,Optical fiber polarization,Optical switches,fiber gratings,wavelength selected switch,Atomic and Molecular Physics, and Optics
Publication ISSN: 0733-8724
Last Modified: 17 Jul 2024 07:19
Date Deposited: 29 May 2024 15:24
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Related URLs: https://ieeexpl ... ument/10497851/ (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2024-04-12
Published Online Date: 2024-04-12
Accepted Date: 2024-04-01
Authors: Song, Qingguo
Dai, Yuze
Xiao, Xiangpeng
Chen, Haoshuo
Liu, Chen
Shu, Xuewen
Sun, Qizhen
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Wan, Zhujun
Yan, Zhijun



Version: Accepted Version

Access Restriction: Restricted to Repository staff only until 12 April 2025.

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