Device for realizing dual-polarization Airy obstacle avoidance signal transmission based on single SLM spatial partition

Abstract

The invention relates to a device for realizing dual-polarization Airy obstacle avoidance signal transmission based on single SLM spatial partition, and belongs to the field of communication. The waveform generator generates a signal and loads the signal to the Mach-Zehnder modulator; signals are transmitted in an optical carrier, divided into two beams of mutually perpendicular Gaussian light ina polarization state through a polarization beam splitter, enter a space channel through a collimator, enter an upper half area and a lower half area of an SLM respectively, are reflected by the SLM,penetrate through a lens and form Airy beams, and the two beams of Airy beams in the polarization state are coupled through a beam combiner and then are transmitted to a receiving end through an optical fiber. Two Airy beams are formed through only one spatial light modulator to realize obstacle-bypassing transmission, and signals are loaded on the Airy beams in a dual-polarization state through apolarization multiplexing technology, so that the channel capacity is doubled, and the system and signal transmission cost is reduced.

Description

technical field [0001] The invention belongs to the communication field, and relates to a device for realizing dual-polarization Airy obstacle signal transmission based on a single SLM space partition. Background technique [0002] Diffraction is a fundamental property of light beams, which can be used to explain all classical wave phenomena. Due to the existence of diffraction, the beam spot gradually becomes larger and the energy gradually diverges during the propagation of the beam. Therefore, in the early days of laser invention, people have begun to think about how to eliminate or counteract the diffraction effect. In nonlinear media, researchers have achieved the suppression of beam diffraction by using the self-focusing nonlinearity of the medium, that is, the formation mechanism of spatial optical solitons. This approach was proven experimentally several years ago. However, it is more desirable to realize non-diffraction beams in free space, and this requirement a...

AI Technical Summary

Problems solved by technology

The price of the spatial light modulator is high. In a general Airy beam system, a spatial light modulator only performs phase modulation on a Gaussian beam, resulting in high system cost and unsatisfactory channel capacity.

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