Superdiffraction emitting in space laser communication

Ximin Liu; Liren Liu; Dong Zhao; Jiming Wang

doi:10.1117/12.678298

9 September 2006 Superdiffraction emitting in space laser communication

Ximin Liu, Liren Liu, Dong Zhao, Jiming Wang

Proceedings Volume 6290, Laser Beam Shaping VII; 62900W (2006) https://doi.org/10.1117/12.678298
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Superdiffraction emitting, i.e. far-field spot compression without energy loss in main lob, in space laser communication can increase the main lob energy density. A smaller far-field spot in conjunction with a higher main lob energy density can improve the detection accuracy greatly, and enhance the communication capability of space laser communication system as a result. So superdiffraction emitting is of great significance to space laser communication. In most of the spot compression approaches, the main lob will suffer considerable loss of energy caused by the compression. Aiming at the superdiffraction emitting in space laser communication, we propose two schemes to obtain far-field spot compression without energy loss in main lob. One scheme is based on SA algorithm. We first design the intensity distribution in the far-field receiving plane to meet the particular requirement of space laser communication. According to the desired intensity distribution, we obtain the phase profile of the diffractive phase element (DPE) using the SA algorithm. Placing the designed DPE on the emitting plane, the superdiffraction emitting is achieved. The other scheme is based on YG algorithm. By using the algorithm, we convert the Gaussian beam into an appropriately designed high quality uniform beam in emitting plane. Using the high quality uniform beam as the emitting beam, we then gain far-field spot compression without energy loss in main lob. By means of the two schemes we proposed, the superdiffracion emitting in space laser communication is obtained.

Citation Download Citation

Ximin Liu, Liren Liu, Dong Zhao, and Jiming Wang "Superdiffraction emitting in space laser communication", Proc. SPIE 6290, Laser Beam Shaping VII, 62900W (9 September 2006); https://doi.org/10.1117/12.678298

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KEYWORDS

Laser communications

Gaussian beams

Telecommunications

Diffraction

Laser systems engineering

Solids

Annealing

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