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Reduction of coupling loss in a one-to-many collimating system for a wavelength division (de)multiplexer

机译:减少波分多路复用器一对多准直系统中的耦合损耗

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In a 1 x N wavelength division (de)multiplexer, N receiving (Rx-) gradient-index-rod lenses (GRIN's) are connected to a common transmitting (Tx-) GRIN. All GRIN's are a little longer (Delta Z(0) for the Tx- and Delta Z(i) with i = 1, 2,..., N for the Rx-GRIN's) than the quarter-pitch. To reduce the average coupling loss and the deviations, Delta Z(0) and Delta Z(i) are optimized independently (unequally) or equally by computer programming for small N, such as N = 4 and 8. For a larger N (e.g., 16), a relay GRIN is required, which is a little (Delta Z(r)) longer than the half-pitch. The best position of the relay GRIN is located between the seventh and the eighth Rx-GRIN's. Other parameters including Delta Z(0), Delta Z(t), and Delta Z(r) are all optimized. As a result the (de)multiplexer has lower losses. (C) 1998 Optical Society of America. [References: 18]
机译:在1 x N的波分(去)多路复用器中,N个接收(Rx-)梯度折射率棒状透镜(GRIN's)连接到公共发射(Tx-)GRIN。所有GRIN都比四分之一螺距长一些(Tx的Delta Z(0)和Rx-GRIN的Delta Z(i)i = 1,2,...,N)。为了减少平均耦合损耗和偏差,可通过计算机编程针对较小的N(例如N = 4和8)独立(不均等)或相等地优化Delta Z(0)和Delta Z(i)。对于较大的N(例如, (参见图16),需要一个继电器GRIN,该继电器的GRIN比半螺距长一点(Delta Z(r))。继电器GRIN的最佳位置位于第七和第八个Rx-GRIN之间。其他参数包括Delta Z(0),Delta Z(t)和Delta Z(r)均已优化。结果,(解)多路复用器具有较低的损耗。 (C)1998年美国眼镜学会。 [参考:18]

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