Optical Emission Apparatus Speckle Suppression
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Solution Overview
Problem
Coherent space optical communication systems face challenges in coupling light into single-mode fibers due to atmospheric effects like intensity flicker, phase fluctuation, and turbulence, which cause speckle phenomena and reduce receiving efficiency.
Innovation Solution
An optical emission apparatus is developed, comprising a first optical splitter, N optical emission units, and an adjustment unit. The apparatus splits a signal light into N parts based on a preset proportion and adjusts the light beams in real time based on returned optical power information to maximize the optical power entering the receiving apparatus and minimize the impact of speckle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adaptive optical technology is used to resolve light intensity jitter and phase fluctuation, then light intensity stability is improved, but the speckle problem cannot be resolved
Solution Approach 1:
The patent divides the optical emission into N independent optical emission units (where N > 1), each emitting light beams with different spatial distributions. This segmentation allows the system to overcome the speckle effect by combining multiple independent light beams, where the speckle patterns from each unit are statistically independent and thus average out when combined, resolving the speckle problem while maintaining light intensity stability.
2Productivity
If multiple optical emission units are used to suppress speckle, then receiving efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines N optical emission units into a single optical emission apparatus that transmits multiple light beams simultaneously through the same atmospheric channel. By merging the output of multiple units and combining their light beams at the receiving end, the system achieves speckle suppression and improved receiving efficiency while managing device complexity through integrated control.
Solution Approach 2:
The patent implements a feedback control mechanism where the receiving end measures the combined light signal quality and sends control signals back to the optical emission apparatus. The adjustment unit uses this feedback to dynamically optimize the emission parameters of the N optical emission units, ensuring maximum receiving efficiency while maintaining speckle suppression, thus managing system complexity through intelligent control.
Data Source
AI summary
This application provides an optical emission apparatus, an optical communication system, and an optical communication method. Light beams of N optical emission units in the optical emission apparatus are adjusted, so that an optical power of entering an optical receiving apparatus is maximized, and impact of a speckle caused by turbulence is minimized, thereby improving receiving efficiency of an optical antenna. The optical emission apparatus includes a first optical splitter and N optical emission units, where N is an integer greater than 1; the first optical splitter is configured to transmit received same signal light to the N optical emission units; and the N optical emission units are configured to output the signal light from the first optical splitter, to obtain light beams distributed based on a preset proportion.