Generation Of Accelerating Beam And Its Optical Interconnection Applications

With the rapid development of 5G communication,big data,cloud computing,and the Internet of Things,the explosive growth of traffic has imposed strict requirements on the capacity of data interconnection.As an emerging technology,optical interconnection technique has great potentials to overcome the challenging of traditional short-reach electrical interconnection,in terms of capacity,power consumption,and interconnection delay.Free-space optical interconnection(FSOI)scheme,which provides capabilities of flexible 3D interconnection and high-density parallel interconnection channels,is promising.Traditional FSOI schemes based on the use of Gaussian beam as the transmission carrier face additional link loss duo to the diffraction divergence and interruption of non-line-of-sight(NLOS)interconnection.Alternatively,accelerating beams,such as Airy beams,is an excellent candidate for short-reach FSOI applications,because of their non-diffractive,lateral self-acceleration,and self-healing properties.My thesis is focused on the Airy beam generation with flexible trajectory manipulation,and a reconfigurable full-duplex NLOS interconnection for short-reach FSOI applications.The main research outcomes of my thesis are summarized as follows:(1)We propose to use the accelerating beam as the transmission optical carrier,for the short-reach FSOI application,after theoretically explain the performance constraints of current FSOI scheme based on Gaussian beam.Meanwhile,singular properties of accelerating beams are elaborated,leading to a performance improvement of FSOI application.(2)We demonstrate the Airy beam generation scheme with flexible trajectory manipulation,with the help of the cubic phase mask.Our proposed scheme is able to generate 2D Airy beams and transmit along arbitrary parabolic trajectories in 3D free-space,by simply adjusting the cubic phase mask determined by the proposed beam generation vector.(3)We realize a wavelength-division-multiplexing enabled full-duplex 100 G FSOI system,based on the proposed Airy beam generation with flexible trajectory manipulation.Both downstream C-band and upstream O-band 2D Airy beams are experimentally transmitted over 40 cm free-space link,with a receiver sensitivity of-16.7d Bm.In particular,the NLOS interconnection performance of the 2D Airy beam based FSOI is superior to that of traditional Gaussian beam-based one.