TUCAN

TUCAN解决了客户端设备（CPE）对高数据速率（1到10Gb/s） WDM PON接入网的组件需求。目前的光TDM接入网，例如GPON，使用单一的上游波长，使用低成本的固定波长激光器，每个激光器的成本低于10美元。为了接近WDM pon的这些成本，必须开发一种通用的CPE WDM发射机，可以在任何网络单元上使用，而不考虑工作波长，即它必须是“无色”或可调谐的。可调谐DBR激光器提供了一种解决方案，允许系统设计的灵活性，因此是一种广泛适用和面向未来的解决方案。然而，目前可用产品的成本，功耗和波长控制要求禁止在接入链路中使用它们。该项目的目标是开发一种低成本可调收发器技术，该技术将能够满足接入网成本目标，同时保持高性能并降低功率要求。这将通过针对当前产品的主要成本和功耗元素来实现。我们战略的关键要素包括将绝对波长的控制转移到网络，将光学元件集成到单个芯片上，从而简化封装要求，以及消除热冷却器。原型CPE构建将推动整个模块的开发，使其与商业和住宅应用的设备要求兼容，并为系统级试验提供单元。通过这种方式，该项目旨在展示基于可调谐DBR激光的CPE作为高带宽、长距离FTTH网络的关键推动者的技术和经济可行性。

TUCAN addresses the component needs for Customer Premises Equipment (CPE) for high data rate (1 to 10Gb/s) WDM PON access networks. Current optical TDM access networks, such as GPON, operate with a single upstream wavelength and utilise low cost, fixed wavelength lasers at cost levels of less than $10 per laser. To approach these costs for WDM PONs it is essential to develop a universal CPE WDM transmitter that can be used on any network unit, regardless of the operating wavelength, i.e. it must be either ‘colourless’ or tunable. Tunable DBR lasers provide a solution that allows flexibility in system design and hence are a widely applicable and future proof solution. However, the cost, power consumption and wavelength control requirements of currently availableproducts prohibit their use in access links.The project targets the development of a low cost tunable transceiver technology that will be capable of meeting access network cost targets whilst maintaining high performance and reducing power requirements. This will be achieved by targeting the main cost and power consuming elements of current products. Key elements of our strategy include transfer of the control of absolute wavelength to the network, use of monolithic integration of the optical components on to a single chip, thereby simplifying the packaging requirements, and the elimination of thermocoolers. Prototype CPE build will drive the development of the overall module to be compatible with equipment requirements forboth business and residential applications and provide units for system level trials. In this way the project aims to demonstrate both the technical and economic feasibility of tunable DBR laser-based CPE as a key enabler for high bandwidth, long reach FTTH networks.