In this paper,we have proposed a hybrid optical wavelength demultiplexer and power combiner for a hybrid timeand wavelength-division multiplexing(TWDM)passive optical network(PON),i.e.,a single passive optical device ...In this paper,we have proposed a hybrid optical wavelength demultiplexer and power combiner for a hybrid timeand wavelength-division multiplexing(TWDM)passive optical network(PON),i.e.,a single passive optical device that functions as a 1×N wavelength demultiplexer for distributing the downstream signal in multiple wavelengths from the optical line terminal(OLT)to the N optical network units(ONUs),and simultaneously as an N×1 power combiner for collecting the upstream signal in the same wavelength from the N ONUs to the OLT.Through a design example of a 32 channel hybrid optical wavelength demultiplexer and power combiner on the silicon-on-insulator platform,our numerical simulation result shows that the insertion loss and adjacent channel crosstalk of the downstream wavelength demultiplexer are as low as 4.6 and-16.3 dB,respectively,while the insertion loss and channel non-uniformity of the upstream power combiner can reach 3.5 and 2.1 dB,respectively.The proposed structure can readily be extended to other material platforms such as the silica-based planar lightwave circuit.Its fabrication process is fully compatible with standard clean-room technologies such as photolithography and etching,without any complicated and/or costly approach involved.展开更多
为有效解决时分波分复用无源光网络(time and wavelength division multiplexed passive optical network,TWDM-PON)中因采用节能算法而导致的业务时延恶化问题,提出一种考虑业务QoS的光线路终端(optical line terminal,OLT)节能算法。...为有效解决时分波分复用无源光网络(time and wavelength division multiplexed passive optical network,TWDM-PON)中因采用节能算法而导致的业务时延恶化问题,提出一种考虑业务QoS的光线路终端(optical line terminal,OLT)节能算法。通过建立针对局端设备光线路终端的新型能耗模型,使发射机和接收机能够独立地关闭或开启,从而在上下行业务不对称的情况下能够最大化地降低光线路终端能耗;通过区分业务、调整轮询周期的大小以及工作收发机的数目,保证不同业务QoS的要求。仿真表明,算法在保证业务QoS的前提下,最大化地降低了TWDM-PON中OLT的能耗。展开更多
文摘In this paper,we have proposed a hybrid optical wavelength demultiplexer and power combiner for a hybrid timeand wavelength-division multiplexing(TWDM)passive optical network(PON),i.e.,a single passive optical device that functions as a 1×N wavelength demultiplexer for distributing the downstream signal in multiple wavelengths from the optical line terminal(OLT)to the N optical network units(ONUs),and simultaneously as an N×1 power combiner for collecting the upstream signal in the same wavelength from the N ONUs to the OLT.Through a design example of a 32 channel hybrid optical wavelength demultiplexer and power combiner on the silicon-on-insulator platform,our numerical simulation result shows that the insertion loss and adjacent channel crosstalk of the downstream wavelength demultiplexer are as low as 4.6 and-16.3 dB,respectively,while the insertion loss and channel non-uniformity of the upstream power combiner can reach 3.5 and 2.1 dB,respectively.The proposed structure can readily be extended to other material platforms such as the silica-based planar lightwave circuit.Its fabrication process is fully compatible with standard clean-room technologies such as photolithography and etching,without any complicated and/or costly approach involved.
文摘为有效解决时分波分复用无源光网络(time and wavelength division multiplexed passive optical network,TWDM-PON)中因采用节能算法而导致的业务时延恶化问题,提出一种考虑业务QoS的光线路终端(optical line terminal,OLT)节能算法。通过建立针对局端设备光线路终端的新型能耗模型,使发射机和接收机能够独立地关闭或开启,从而在上下行业务不对称的情况下能够最大化地降低光线路终端能耗;通过区分业务、调整轮询周期的大小以及工作收发机的数目,保证不同业务QoS的要求。仿真表明,算法在保证业务QoS的前提下,最大化地降低了TWDM-PON中OLT的能耗。
