Sun Lili, Ye Tong, Wang Xiaowen, Zhou Linjie, Chen Jianping
Department of Electronic Engineering, State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China.
Opt Express. 2012 Mar 26;20(7):7663-71. doi: 10.1364/OE.20.007663.
This paper proposes a chirp-free optical return-to-zero (RZ) modulator using a double coupled microring resonator. Optical RZ modulation is achieved by applying a clock (CLK) driving signal to the input coupling region and a non-return-to-zero (NRZ) driving signal to the output coupling region. Static and time-domain coupled-mode theory (CMT) based dynamic analyse are performed to theoretically investigate its performance in RZ modulation. The criteria to realize RZ modulation are deduced. Various RZ modulation formats, including RZ phase-shift-keying (RZ-PSK), carrier-suppressed RZ (CSRZ), and RZ intensity modulation formats, can be implemented by using CLK and NRZ signals with different combinations of polarities. Numerical simulations are performed and the feasibility of our modulator at 10 Gbit/s for the multiple RZ modulation formats is verified.
本文提出了一种使用双耦合微环谐振器的无啁啾归零（RZ）光调制器。通过向输入耦合区域施加时钟（CLK）驱动信号，并向输出耦合区域施加非归零（NRZ）驱动信号来实现光RZ调制。基于静态和时域耦合模理论（CMT）进行动态分析，以从理论上研究其在RZ调制中的性能。推导了实现RZ调制的准则。通过使用具有不同极性组合的CLK和NRZ信号，可以实现各种RZ调制格式，包括RZ相移键控（RZ-PSK）、载波抑制RZ（CSRZ）和RZ强度调制格式。进行了数值模拟，并验证了我们的调制器在10 Gbit/s下对于多种RZ调制格式的可行性。
