A research on the characteristics of an interleaver with a symmetrical resonator

Huai-wei Lu; Yun Wei; Kai-jun Wu; Chun-li Wang; Zhan-jun Jiang; Guan-wei Luo

doi:10.1007/s11801-013-2362-6

Optoelectronics Letters ›› 2013, Vol. 9 ›› Issue (1) : 21-24. DOI: 10.1007/s11801-013-2362-6

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A research on the characteristics of an interleaver with a symmetrical resonator

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Abstract

In order to improve the transmission performance of the conventional Mach-Zehnder interferometer (MZI), a novel interleaver combining an “8” form ring resonator with a planar 3×3 single fiber coupler is proposed. Based on the phase modulation provided by the ring resonator, a flat filtering response is obtained by optimizing the coupling angle of resonator. The output expression is derived and numerical simulation is performed. The simulation indicates that the 0.5 dB passband and 25 dB stopband of the proposed interleaver are simultaneously improved remarkably, which are much wider than those of the single-stage MZI and the two-stage MZI interleavers, and the filtering performance of the proposed interleaver, which achieves a nearly square spectrum response, is also much better. Compared with the interleaver based on an asymmetrical MZI with a resonator in one arm, there is no difference between the intensities of two coherent beams in the condition of considering the influence of the propagation loss. Theoretical analysis shows that the influence of the propagation loss on extinction ratio can be effectively reduced.

Keywords

Output Port / Ring Resonator / Extinction Ratio / Coherent Beam / Dense Wavelength Division Multiplex

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Huai-wei Lu, Yun Wei, Kai-jun Wu, Chun-li Wang, Zhan-jun Jiang, Guan-wei Luo. A research on the characteristics of an interleaver with a symmetrical resonator. Optoelectronics Letters, 2013, 9(1): 21‒24 https://doi.org/10.1007/s11801-013-2362-6

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This work has been supported by the National Natural Science Foundation of China (No.10972095) and the Research Projects of Graduate Teacher of Gansu Province of China (No.1204-01).