在传统的并联微环结构中,可通过改变相干距离来实现慢光效应的调谐,但动态调谐无法实现。在包层中嵌入加热器的改进型微环阵列,利用热光调谐相邻环之间的相移器,实现连续调节任意信道的慢光效应。利用传输矩阵法建立密集波分复用器(DWDM)的函数模型,Matlab仿真分析1×4密集波分复用器的慢光效应。仿真结果表明:改变相应微环之间的附加相移,DWDM具有可调谐光延迟信道的特性,输出信道频谱强度的半峰全宽(FWHM)约为0.05 nm,信道间隔为100 GHz。该方法具有光延迟信道可切换、可动态调谐的特性,增强了光学器件的灵活性。

In the traditional parallel micro-ring structure, we can achieve the slow light effect tuning by adjusting the coherence distance, but cannot achieve dynamic tuning. Improved micro-ring array, embedding the heater in the cladding, uses thermo-optical tunability to adjust the adjacent ring between the phase shifter, in order to achieve continuous adjustment of any channel slow light effect. We use the transfer matrix method to establish the function model of dense wavelength division multiplexing (DWDM) and simulate the slow light effect of 1×4 DWDM by Matlab. The simulation results show that the DWDM with tunable optical delay channel is obtained by changing the additional phase shift between the corresponding microcircuits, the full width at half maximum (FWHM) of spectral intensity for out channel is about 0.05 nm, and the channel spacing is 100 GHz. The method can switch and dynamically adjust optical delay channel, and enhance the flexibility of the optical device.