Performance of laser inter-satellite links with dynamic beam waist adjustment.

In this paper, we propose the idea of dynamic beam waist adjustment for laser inter-satellite communications, and study the performance of this dynamic-beam scheme. The beam waist adjustment is based on continuous detection of the instantaneous pointing error angle, which is performed at the transmitter side. Using a square to approximate the circular detector region, we obtain a closed-form expression for calculating the proportion of power that can be collected by the receiver aperture, and derive a simple algebraic solution for the optimum dynamic beam waist. Due to its simple form, the dynamic beam waist value can be computed in real time at the transmitter, and therefore, the adjustment is practically implementable. It is shown that the performance of laser inter-satellite links with dynamic beam waist is better than that with fixed beam waist.

[1]  P. Kam,et al.  A Robust GLRT Receiver With Implicit Channel Estimation and Automatic Threshold Adjustment for the Free Space Optical Channel with IM/DD , 2014, Journal of Lightwave Technology.

[2]  Fan Yang,et al.  Free-Space Optical Communication with Nonzero Boresight Pointing Errors , 2014, IEEE Transactions on Communications.

[3]  Mi Li,et al.  BER performance of MSK in ground-to-satellite uplink optical communication under the influence of atmospheric turbulence and detector noise. , 2013, Optics letters.

[4]  Julio C Gutiérrez-Vega,et al.  Ince-Gaussian beams. , 2004, Optics letters.

[5]  Yongxiong Ren,et al.  Influence of beam wander on uplink of ground-to-satellite laser communication and optimization for transmitter beam radius. , 2010, Optics letters.

[6]  N S Kopeika,et al.  Beam width and transmitter power adaptive to tracking system performance for free-space optical communication. , 1997, Applied optics.

[7]  K I Schultz,et al.  Satellite vibration measurements with an autodyne CO(2) laser radar. , 1994, Applied optics.

[8]  Yoshihisa Takayama,et al.  In-orbit measurements of spacecraft microvibrations for satellite laser communication links , 2010 .

[9]  Jing Ma,et al.  Influence of beam wander on bit-error rate in a ground-to-satellite laser uplink communication system. , 2008, Optics letters.

[10]  Keizo Nakagawa,et al.  Optimum divergence angle of a Gaussian beam wave in the presence of random jitter in free-space laser communication systems. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[11]  Shlomi Arnon,et al.  Laser satellite communication network-vibration effect and possible solutions , 1997 .

[12]  Yoshio Karasawa,et al.  Ultrahigh-speed optical-beam steering by optical phased array antenna , 1996, Photonics West.

[13]  Wolfgang M. Neubert,et al.  Experimental demonstration of an optical phased array antenna for laser space communications. , 1994, Applied optics.

[14]  Mohamed-Slim Alouini,et al.  Ergodic Capacity Analysis of Free-Space Optical Links With Nonzero Boresight Pointing Errors , 2015, IEEE Transactions on Wireless Communications.