Beam wander relieved optical switch using Bessel beams in turbulent atmosphere  

作　　者：Youpeng Xie Ting Lei Chuanwu Yang Luping Du Xiaocong Yuan 谢友朋;雷霆;杨传武;杜路平;袁小聪(Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology,Shenzhen University)

机构地区：[1]Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology,Shenzhen University

出　　处：《Chinese Optics Letters》2019年第9期10-14,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. U1701661, 61427819, 11774240, and 11604218);the Science and Technology Innovation Commission of Shenzhen (Nos. KQTD2015071016560101 and KQJSCX20170727100838364);the support given by the Leading Talents of Guangdong Province Program (No. 00201505);the Natural Science Foundation of Guangdong Province (Nos. 2016A030312010 and 2017A030313351)

摘　　要：The digital micro-mirror device(DMD)-based optical switch has the advantages of high-speed channels reallocation, miniaturization, stability, and large capacity for short reach optical communication in the datacenter.However, thermal turbulent atmosphere in the datacenter would cause perturbations and channel crosstalk for the optical switch. The self-healing optical beams such as the Bessel beams have the non-diffraction property to mitigate the turbulence issue. Here, we propose and demonstrate a Bessel beams enabled DMD-based optical switch to improve the stability and performance of optical communication in turbulent atmosphere. We statistically characterize the beam wanders of the Gaussian and Bessel beams in turbulent atmosphere at temperatures of 60°C and 80°C. We build the two-channel optical switch communication system and measure the bit error rate of the 15 Gbit/s on–off keying signals transmitted by the Gaussian and Bessel beams at temperatures of 60°C and 80°C, respectively. The optical switch using the Bessel beams shows lower bit error rates with weaker fluctuations compared with the Gaussian beams. The DMD-based optical switch using the Bessel beams has the potential for practical optical communication applications in the datacenter.The digital micro-mirror device(DMD)-based optical switch has the advantages of high-speed channels reallocation, miniaturization, stability, and large capacity for short reach optical communication in the datacenter.However, thermal turbulent atmosphere in the datacenter would cause perturbations and channel crosstalk for the optical switch. The self-healing optical beams such as the Bessel beams have the non-diffraction property to mitigate the turbulence issue. Here, we propose and demonstrate a Bessel beams enabled DMD-based optical switch to improve the stability and performance of optical communication in turbulent atmosphere. We statistically characterize the beam wanders of the Gaussian and Bessel beams in turbulent atmosphere at temperatures of 60°C and 80°C. We build the two-channel optical switch communication system and measure the bit error rate of the 15 Gbit/s on–off keying signals transmitted by the Gaussian and Bessel beams at temperatures of 60°C and 80°C, respectively. The optical switch using the Bessel beams shows lower bit error rates with weaker fluctuations compared with the Gaussian beams. The DMD-based optical switch using the Bessel beams has the potential for practical optical communication applications in the datacenter.

关 键 词：BEAM WANDER optical SWITCH BESSEL BEAMS 

分 类 号：O4[理学—物理]