Design and analysis of coherent OCDM en/decoder based on photonic crystal
Design and analysis of coherent OCDM en/decoder based on photonic crystal
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DOI：
10.1016/j.optlaseng.2008.04.006
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发表时间：
2008-08
影响因子：
4.6
通讯作者：
Chongfu Zhang;K. Qiu
中科院分区：
文献类型：
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作者：
Chongfu Zhang;K. Qiu
本文介绍了一种基于光子晶体（PhC）的光码分复用（OCDM）新型相干光编码器/解码器的设计和性能分析。在该方案中，通过适当的制造设计，可以通过光子晶体移相器和时间延迟器灵活地控制光脉冲相位和时间延迟。根据PhC传输矩阵定理，应用杂质层和正常周期层的组合计算，并分析了基于PhC的光编码/解码器的性能。通过数值计算研究了光子带隙中调谐波的反射、透射、时延特性以及脉冲编解码的光谱。理论分析和数值结果表明，该光脉冲实现了适当的相位调制和时延，并获得了约8dB比率的自相关和互相关，这证明了真正的脉冲相位调制在许多应用中的适用性。
The design and performance analysis of a new coherent optical en/decoder based on photonic crystal (PhC) for optical code -division -multiple (OCDM) are presented in this paper. In this scheme, the optical pulse phase and time delay can be flexibly controlled by photonic crystal phase shifter and time delayer by using the appropriate design of fabrication. According to the PhC transmission matrix theorem, combination calculation of the impurity and normal period layers is applied, and performances of the PhC-based optical en/decoder are also analyzed. The reflection, transmission, time delay characteristic and optical spectrum of pulse en/decoded are studied for the waves tuned in the photonic band-gap by numerical calculation. Theoretical analysis and numerical results indicate that the optical pulse is achieved to properly phase modulation and time delay, and an auto-correlation of about 8dB ration and cross-correlation is gained, which demonstrates the applicability of true pulse phase modulation in a number of applications.