matched beam 中文意思是什麼
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First, i made and improved some beam propagation method ( bpm ) programs, consisting of 2d ( eim - bpm ) and 3d bpm, with transparent boundary condition ( tbc ) and perfectly matched layer ( pml ) boundary condition respectively
首先建立了光束傳播法（ bpm ）的模擬平臺，解決了邊界問題。利用建立的三維bpm平臺設計了漸變折射率波導的mmi耦合器。 -
In optical fiber aspect, the incident beam can be collimated, converted and focused by some kinds of lenses, making the mode of incident beam matched with or near the optical fiber ’ s modes. in this thesis, thorough theoretical analyses and experimental investigations were made for the external optical properties of a 980nm high - power tunnel junction regenerated multi - active - region quantum well stripe - geometry algaas / gaas / ingaas ld and three different stripe - width 980nm high - power
本論文圍繞本實驗室研發的新型隧道再生多有源區980nmalgaas / gaas / ingaas量子阱大功率半導體激光器和多種條寬的單有源區980nmalgaas / gaas / ingaas量子阱大功率半導體激光器的光場外特性、單模階躍折射率光纖和多模漸變折射率光纖的模場特性進行了深入的理論分析和實驗研究。 -
This dissertation studies the inversion of sound speed profile ( ssp ) in shallow water, including the effects of sediment parameters on the multi - path arrival structure, the algorithm of the ssp inversion using multi - path arrival time differences and the ssp inversion based on matched beam processing ( mbp ). 1
採用理論分析、數值模擬方法研究了沉積層參數對淺海多途到達結構的影響；推導和論證了到達時差反演淺海聲速剖面演算法、提出和研究了用匹配波束處理反演淺海聲速剖面演算法，並且應用東中國海實驗數據對這兩種演算法進行了驗證。
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