我用ZEMAX計(jì)算光纖的耦合效率，可是我發(fā)現(xiàn)當(dāng)接收光纖的數(shù)值孔徑增大時(shí)耦合效率反而降低了，這是怎么回事呢？

我也想知道，同問，呵呵

我是新手也想知道對于光耦合的問題

有沒有這方面的書籍？

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System Efficiency              :      0.999138 ZR -RzT1  
`-%dHvB^R  
Receiver Efficiency            :      0.945327 BdMd\1eMw  
2Y%7.YX"  
Coupling Efficiency            :      0.944512 (-0.2479 dB) c0Bqm  
|||m5(`S  
Maximum Efficiency              :      0.995227 L){V(*K '  
SHs [te[  
The system efficiency is the fraction of the energy in the source |{(JUXo6K  
beam that exits the optical system. This value is determined by gm pY[  
the input na, entrance pupil size and position, apodization, qtdkK LT  
transmission of the optics, and vignetting. U
#[T!E  
0ETT@/)]z  
The receiver efficiency is the fraction of the transmitted energy ?A;RTM  
that couples from the exit pupil to the receiving fiber. This k-a1^K3  
value is determined by aberrations and the na of the receiving fiber. G6
2;p#  
rHjDf[5+  
The coupling efficiency is the fraction of energy radiated Op8Gj `  
by the source that couples into the receiver. This is the >]anTF`d  
product of the system and receiver efficiencies. V)Oot|  
NC!B-3?x  
The maximum efficiency is the coupling efficiency if there 4CchE15  
were no aberrations. ;~DrsQb  
"=n%L +6%  
數(shù)值孔徑不是越大越好呀,當(dāng)耦合光學(xué)系統(tǒng)的模式與你光線的模式完全匹配時(shí),耦合效率最大. 5Pq6X  
耦合效率的計(jì)算有一個(gè)積分過程,還是比較復(fù)雜的.

            

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