Improved approach to low-loss and high-uniformity MMI devices
2000; Elsevier BV; Volume: 181; Issue: 4-6 Linguagem: Inglês
10.1016/s0030-4018(00)00782-3
ISSN1873-0310
AutoresRui Yin, Jianyi Yang, Xiaoqing Jiang, Jin Li, Minghua Wang,
Tópico(s)Optical Coatings and Gratings
ResumoImproved approach to low-loss and high-uniformity multimode interference (MMI) devices is proposed in this paper. An optimized index contrast is selected to decrease the propagation constant errors of modes near cutoff in the MMI region. 1×N MMI splitters are analyzed by exact mode analysis. Results show that the loss and uniformity of this new structure are notably improved, especially when N is large. The loss of 0.0892 and uniformity of 0.0826 are acquired when N=32. A formulating approach for device-design is presented and it is suitable for all types of MMI couplers.
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