波分复用技术已被用来解决骨干网和城域网中信息容量“瓶颈”问题。在实验室研究中，已经展示了几百Tb/s速率信号传输的可行性。然而，由于接入网对成本以及功耗的苛刻要求，波分复用技术在接入网中的应用仍然受到较大的限制。端口无关波分复用技术对波长、比特率和调制格式等透明，可使用单一收发器适配。主要关注免热电制冷器的波长透明工作的收发器，从而避免使用最昂贵的供电设备，并进一步开发能够极大减小器件和操作成本的实用端口无关收发器。此外，硅光子技术将为光波分复用接入网技术打开新的窗口。

WDM technologies have been employed to solve information capacity bottle neck in long haul and metro networks. In laboratory research, feasibility of hundreds Tb/s signal transmission is demonstrated. However, penetration of WDM technology in access networks is rather limited due to very strict requirement of cost including power consumption. The port agnostic WDM technologies enable adaptation of a single transceiver regardless of wavelength, bit rate, and modulation format. We have been focused on the wavelength transparent operation of transceivers without a thermoelectric cooler that is the most power hungry devices. Further development of true port agnostic transceiver will reduce both equipment and operation costs considerably. In addition, introduction of silicon photonics will open new windows for WDM access technologies.