非線性鏈路寬帶微波光子信號可調控傳輸研究

閆連山

摘 要：微波光子技術涉及微波信號產生、傳輸、控制和處理等，在軍事和民用領域有著重要的作用。尤其是，低噪聲、大動態范圍、精細可調控的微波光子鏈路的實現具有重大理論意義和應用價值。主要圍繞寬帶微波光子信號傳輸理論與機制等研究方向，從鏈路非線性、信號的調控方式與手段、新型編碼與傳輸機制等幾個方面開展理論和技術問題的研究。具體包括：研究實際非線性鏈路理論傳輸極限與鏈路和關鍵器件參數之間的關系；研究能夠提高頻譜效率、傳輸距離或容量的新型傳輸機理或編碼方式；研究保持高信噪比的大動態范圍信號調諧方式；研究面向動態重構和泛在接入的高精細鏈路頻譜操控方法；研究在線性能監測與自適應補償的鏈路優化技術。在研究過程中，主要采用的方式為：首先建立系統性和完善的非線性鏈路傳輸理論；其次引入新型編碼方式與傳輸機制；最后突出頻譜操控與自適應補償技術重要性。目前主要獲得了以下五個方面的進展：（1）微波光子鏈路非線性理論模型的建立和仿真軟件的開發；（2）光纖鏈路非線性效應實驗研究及應用；（3）微波光子鏈路色散和非線性補償；（4）微波信號光學調控與監控的研究；（5）MIMO傳輸與軌道交通光無線網絡示范。

關鍵詞：微波光子 非線性 可調控 鏈路優化

Abstract：Microwave photonics has been widely used in the fields of civil and military， including the generation， the transmission， the manipulation and the processing microwave signals using photonic technology. In particular， the microwave photonic links with low noise figure， large spur-free dynamic range （SFDR）， and fine tenability are of great significance both in theory and in practical applications. This subject mainly focuses on the transmission theory of broadband microwave photonic signals， such as link nonlinearity， signal manipulation， new coding and transmission mechanism， etc. More specifically， the contents are listed as follows： （1）the relationship between theoretical transmission limit of the nonlinear link and parameters of the key components； （2）the novel transmission mechanism or coding technology to improve the spectral efficiency， the transmission distance and the capacity； （3）the signal tenability technology with high signal-to-noise ratio （SNR） and large dynamic range； （4）the high-accuracy frequency manipulation schemes for reconfigurable and ubiquitous access； （5）the link optimization technology based on performance monitoring and adaptive compensation. We start from establishing a complete nonlinear transmission theory. Then novel coding methods and transmission mechanisms are introduced. Finally， the frequency manipulation and adaptive compensation techniques are highlighted. Up to now， five significant advances in this project have been reported， including； （1）the development of nonlinear theoretical model and the software for microwave photonic links； （2）the experimental investigations of the optical link nonlinearity and applications； （3）the chromatic and nonlinearity compensation of the microwave photonic link； （4）the photonic tuning and monitoring of the microwave signals； （5）the MIMO transmission system and the photonics-based wireless network demonstration system for rail applications.

Key Words：Microwave photonic； Nonlinearity； Tenability； Link optimization

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