Impacts of environmental factors to bi-directional 2×40 Gb/s WDM free-space optical communication

Abstract Bi-directional short-range free-space optical (FSO) communication with bi-directional 2×4×10 Gb/s wavelength division multiplexing (WDM) channel signals is demonstrated by using a transmission distance of 25 m. The single-mode-fiber components are used in the optical terminals for both optical transmitting and receiving functions. The measured power penalties for the 25-m bi-directional four-channel FSO communication compared with the back-to-back link and uni-directional transmission system are less than 0.8 dB and 0.2 dB, respectively. The environmental factor effects, including the oblique incidence through the building window glasses, thermally induced non-uniform air index as well as rainfall on the FSO performance are investigated and analyzed. The experimental results show that rainfall is influential for free space optical transmission.

[1]  B. Edĺen.  The Refractive Index of Air , 1966 .

[2]  P. Ciddor.  Refractive index of air: new equations for the visible and near infrared. , 1996, Applied optics.

[3]  Ke Wang,et al.  4$\,\times\,$ 12.5 Gb/s WDM Optical Wireless Communication System for Indoor Applications , 2011, Journal of Lightwave Technology.

[4]  Tianshu Wang,et al.  Single-source bidirectional free-space optical communications using reflective SOA-based amplified modulating retro-reflection , 2017 .

[5]  D Simeonidou,et al.  Field trial of a 1.5 Tb/s adaptive and gridless OXC supporting elastic 1000-fold all-optical bandwidth granularity. , 2011, Optics express.

[6]  Zabih Ghassemlooy,et al.  A Hybrid Optical Fiber and FSO System for Bidirectional Communications Used in Bridges , 2015, IEEE Photonics Journal.

[7]  Sang-Kook Han,et al.  Simultaneous Wired and Wireless 1.25-Gb/s Bidirectional WDM-RoF Transmission Using Multiple Optical Carrier Suppression in FP LD , 2009, Journal of Lightwave Technology.

[8]  K. P. Birch,et al.  An Updated Edln Equation for the Refractive Index of Air , 1993 .

[9]  E. Ciaramella,et al.  Carrier class availability in a transparent 1.25 Gb/s free space optical communication link over 320 m , 2012, 2012 International Workshop on Optical Wireless Communications (IWOW).

[10]  Z. Ghassemlooy,et al.  Performance Analysis of Ethernet/Fast-Ethernet Free Space Optical Communications in a Controlled Weak Turbulence Condition , 2012, Journal of Lightwave Technology.

[11]  Zabih Ghassemlooy,et al.  2 $\times$ 80 Gbit/s DWDM Bidirectional Wavelength Reuse Optical Wireless Transmission , 2013, IEEE Photonics Journal.

[12]  P. Jeppesen,et al.  40-Gb/s all-optical wavelength conversion based on a nonlinear optical loop mirror , 2000, Journal of Lightwave Technology.

[13]  Paul F. Szajowski,et al.  40-Gb/s DWDM free-space optical transmission link over 4.4 km , 2000, LASE.

[14]  Manav R. Bhatnagar,et al.  Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel , 2017, Journal of Lightwave Technology.

[15]  E. Ciaramella,et al.  1.28-Tb/s (32 $\times$ 40 Gb/s) Free-Space Optical WDM Transmission System , 2009, IEEE Photonics Technology Letters.