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INTEGRATED CONTROL CIRCUIT FOR THERMALLY ACTUATED OPTICAL PACKET SWITCH

机译：热驱动光学分组开关的集成控制电路

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摘要

The advance in communication technology and growth of internet traffic have continuously driven the fast evolution of networks. Compared to the traditional optoelectronic switch, all-optical switch provides high throughput, rich routing functionalities, and excellent flexibility for rapid signal exchange in fiber optical network system. Among various all-optical switches, thermal actuated ring type switch provides the advantages of high accuracy, easy actuation, and reasonable switching speed. However, when scale up, thermal ring switch may encounter issues related to fabrication error, non-accurate wavelength response, and large terminal numbers in the control circuit. In this article we propose the employment of an integrated control circuit to compensate the fabrication error and tuning the wavelength response in a thermal actuated ring type optical switch. Additional functionalities can also be added in this circuit by tailoring externally the roundtrip loss or coupling constants of the ring. The design concept can be easily scaled up for large array format optical switch system without much change in the terminal numbers thanks to the three dimensional hierarchy of control circuit design, which effectively reduces the terminal numbers into the cubic root of the total control unit numbers. The integrated circuit has been designed, simulated, as well as fabricated, and demonstrated a decent performance with Free Spectral Range (FSR) equal to 1.5nm at a wavelength of 1534nm and center wavelength shift of the ring up to 0.3nm for thermal actuated ring type optical switch.
机译：通信技术的进步和互联网流量的增长不断推动着网络的快速发展。与传统的光电交换机相比，全光交换机具有高吞吐量，丰富的路由功能以及出色的灵活性，可在光纤网络系统中快速交换信号。在各种全光开关中，热动环型开关具有精度高，操纵容易，开关速度合理的优点。然而，当按比例放大时，热环开关可能会遇到与制造误差，不精确的波长响应以及控制电路中的大端子数有关的问题。在本文中，我们建议采用集成控制电路来补偿制造误差并调节热激励环形光开关中的波长响应。通过在外部调整环的往返损耗或耦合常数，还可以在此电路中添加其他功能。借助控制电路设计的三维层次结构，可以轻松地将大型阵列格式光开关系统的设计理念扩大到端子数量，而无需更改端子数量，从而有效地将端子数量减少为总控制单元数量的立方根。该集成电路已经过设计，仿真和制造，并在1534nm波长下的自由光谱范围（FSR）等于1.5nm以及热激活环的中心波长偏移高达0.3nm的情况下表现出不错的性能型光开关。

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